School of Physics

Permanent URI for this community

https://dspace.uohyd.ac.in/handle/1/10

Browse

Browsing School of Physics by Author "Adamson, P."
  • Item
    Adjusting neutrino interaction models and evaluating uncertainties using NOvA near detector data
    ( 2020-12-01) Acero, M. A. ; Adamson, P. ; Agam, G. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Anfimov, N. ; Antoshkin, A. ; Asquith, L. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Bashar, S. ; Bays, K. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blair, J. ; Booth, A. C. ; Bour, P. ; Bowles, R. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Calvez, S. ; Carroll, T. J. ; Catano-Mur, E. ; Childress, S. ; Choudhary, B. C. ; Coan, T. E. ; Colo, M. ; Corwin, L. ; Cremonesi, L. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Doyle, D. ; Dukes, E. C. ; Dung, P. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Elkins, M. ; Feldman, G. J. ; Filip, P. ; Flanagan, W. ; Franc, J. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Hewes, J. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kullenberg, Ch ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Li, L. ; Lin, S. ; Lokajicek, M. ; Luchuk, S. ; Maan, K.
    The two-detector design of the NOvA neutrino oscillation experiment, in which two functionally identical detectors are exposed to an intense neutrino beam, aids in canceling leading order effects of cross-section uncertainties. However, limited knowledge of neutrino interaction cross sections still gives rise to some of the largest systematic uncertainties in current oscillation measurements. We show contemporary models of neutrino interactions to be discrepant with data from NOvA, consistent with discrepancies seen in other experiments. Adjustments to neutrino interaction models in GENIE are presented, creating an effective model that improves agreement with our data. We also describe systematic uncertainties on these models, including uncertainties on multi-nucleon interactions from a newly developed procedure using NOvA near detector data.
  • Item
    Adjusting neutrino interaction models and evaluating uncertainties using NOvA near detector data
    ( 2020-12-01) Acero, M. A. ; Adamson, P. ; Agam, G. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Anfimov, N. ; Antoshkin, A. ; Asquith, L. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Bashar, S. ; Bays, K. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blair, J. ; Booth, A. C. ; Bour, P. ; Bowles, R. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Calvez, S. ; Carroll, T. J. ; Catano-Mur, E. ; Childress, S. ; Choudhary, B. C. ; Coan, T. E. ; Colo, M. ; Corwin, L. ; Cremonesi, L. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Doyle, D. ; Dukes, E. C. ; Dung, P. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Elkins, M. ; Feldman, G. J. ; Filip, P. ; Flanagan, W. ; Franc, J. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Hewes, J. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kullenberg, Ch ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Li, L. ; Lin, S. ; Lokajicek, M. ; Luchuk, S. ; Maan, K.
    The two-detector design of the NOvA neutrino oscillation experiment, in which two functionally identical detectors are exposed to an intense neutrino beam, aids in canceling leading order effects of cross-section uncertainties. However, limited knowledge of neutrino interaction cross sections still gives rise to some of the largest systematic uncertainties in current oscillation measurements. We show contemporary models of neutrino interactions to be discrepant with data from NOvA, consistent with discrepancies seen in other experiments. Adjustments to neutrino interaction models in GENIE are presented, creating an effective model that improves agreement with our data. We also describe systematic uncertainties on these models, including uncertainties on multi-nucleon interactions from a newly developed procedure using NOvA near detector data.
  • Item
    Constraints on Oscillation Parameters from νe Appearance and νμ Disappearance in NOvA
    ( 2017-06-05) Adamson, P. ; Aliaga, L. ; Ambrose, D. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Augsten, K. ; Aurisano, A. ; Backhouse, C. ; Baird, M. ; Bambah, B. A. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Bolshakova, A. ; Bromberg, C. ; Brown, J. ; Brunetti, G. ; Buchanan, N. ; Butkevich, A. ; Bychkov, V. ; Campbell, M. ; Catano-Mur, E. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Coelho, J. A.B. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cremonesi, L. ; Cronin-Hennessy, D. ; Davies, G. S. ; Davies, J. P. ; Derwent, P. F. ; Dharmapalan, R. ; Ding, P. ; Djurcic, Z. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Frank, M. J. ; Gabrielyan, M. ; Gallagher, H. R. ; Germani, S. ; Ghosh, T. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Group, R. ; Grover, D. ; Guo, B. ; Habig, A. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Himmel, A. ; Holin, A. ; Hylen, J. ; Jediny, F. ; Judah, M. ; Kafka, G. K. ; Kalra, D. ; Kasahara, S. M.S. ; Kasetti, S. ; Keloth, R. ; Kolupaeva, L. ; Kotelnikov, S. ; Kourbanis, I. ; Kreymer, A. ; Kumar, A. ; Kurbanov, S. ; Lang, K. ; Lee, W. M. ; Lin, S. ; Liu, J. ; Lokajicek, M. ; Lozier, J. ; Luchuk, S. ; Maan, K. ; Magill, S. ; Mann, W. A. ; Marshak, M. L. ; Matera, K. ; Matveev, V. ; Méndez, D. P. ; Messier, M. D. ; Meyer, H. ; Miao, T. ; Miller, W. H.
    Results are reported from an improved measurement of νμ→νe transitions by the NOvA experiment. Using an exposure equivalent to 6.05×1020 protons on target, 33 νe candidates are observed with a background of 8.2±0.8 (syst.). Combined with the latest NOvA νμ disappearance data and external constraints from reactor experiments on sin22θ13, the hypothesis of inverted mass hierarchy with θ23 in the lower octant is disfavored at greater than 93% C.L. for all values of δCP.
  • Item
    Constraints on Oscillation Parameters from νe Appearance and νμ Disappearance in NOvA
    ( 2017-06-05) Adamson, P. ; Aliaga, L. ; Ambrose, D. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Augsten, K. ; Aurisano, A. ; Backhouse, C. ; Baird, M. ; Bambah, B. A. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Bolshakova, A. ; Bromberg, C. ; Brown, J. ; Brunetti, G. ; Buchanan, N. ; Butkevich, A. ; Bychkov, V. ; Campbell, M. ; Catano-Mur, E. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Coelho, J. A.B. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cremonesi, L. ; Cronin-Hennessy, D. ; Davies, G. S. ; Davies, J. P. ; Derwent, P. F. ; Dharmapalan, R. ; Ding, P. ; Djurcic, Z. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Frank, M. J. ; Gabrielyan, M. ; Gallagher, H. R. ; Germani, S. ; Ghosh, T. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Group, R. ; Grover, D. ; Guo, B. ; Habig, A. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Himmel, A. ; Holin, A. ; Hylen, J. ; Jediny, F. ; Judah, M. ; Kafka, G. K. ; Kalra, D. ; Kasahara, S. M.S. ; Kasetti, S. ; Keloth, R. ; Kolupaeva, L. ; Kotelnikov, S. ; Kourbanis, I. ; Kreymer, A. ; Kumar, A. ; Kurbanov, S. ; Lang, K. ; Lee, W. M. ; Lin, S. ; Liu, J. ; Lokajicek, M. ; Lozier, J. ; Luchuk, S. ; Maan, K. ; Magill, S. ; Mann, W. A. ; Marshak, M. L. ; Matera, K. ; Matveev, V. ; Méndez, D. P. ; Messier, M. D. ; Meyer, H. ; Miao, T. ; Miller, W. H.
    Results are reported from an improved measurement of νμ→νe transitions by the NOvA experiment. Using an exposure equivalent to 6.05×1020 protons on target, 33 νe candidates are observed with a background of 8.2±0.8 (syst.). Combined with the latest NOvA νμ disappearance data and external constraints from reactor experiments on sin22θ13, the hypothesis of inverted mass hierarchy with θ23 in the lower octant is disfavored at greater than 93% C.L. for all values of δCP.
  • Item
    Extended search for supernovalike neutrinos in NOvA coincident with LIGO/Virgo detections
    ( 2021-09-15) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Asquith, L. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Bashar, S. ; Bays, K. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blair, J. ; Booth, A. C. ; Bowles, R. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Calvez, S. ; Carroll, T. J. ; Catano-Mur, E. ; Choudhary, B. C. ; Christensen, A. ; Coan, T. E. ; Colo, M. ; Corwin, L. ; Cremonesi, L. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Dolce, M. ; Doyle, D. ; Dueñas Tonguino, D. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Elkins, M. ; Ewart, E. ; Feldman, G. J. ; Filip, P. ; Franc, J. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hall, A. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Hausner, H. ; Heller, K. ; Hewes, J. ; Himmel, A. ; Holin, A. ; Huang, J. ; Jargowsky, B. ; Jarosz, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Kalitkina, A. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kralik, R. ; Kullenberg, Ch ; Kubu, M. ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lasorak, P. ; Lesmeister, J. ; Lin, S. ; Lister, A.
    A search is performed for supernovalike neutrino interactions coincident with 76 gravitational wave events detected by the LIGO/Virgo Collaboration. For 40 of these events, full readout of the time around the gravitational wave is available from the NOvA Far Detector. For these events, we set limits on the fluence of the sum of all neutrino flavors of F < 7(4)×1010 cm-2 at 90% C.L. assuming energy and time distributions corresponding to the Garching supernova models with masses 9.6(27) M⊙. Under the hypothesis that any given gravitational wave event was caused by a supernova, this corresponds to a distance of r > 29(50) kpc at 90% C.L. Weaker limits are set for other gravitational wave events with partial Far Detector data and/or Near Detector data.
  • Item
    Extended search for supernovalike neutrinos in NOvA coincident with LIGO/Virgo detections
    ( 2021-09-15) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Asquith, L. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Bashar, S. ; Bays, K. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blair, J. ; Booth, A. C. ; Bowles, R. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Calvez, S. ; Carroll, T. J. ; Catano-Mur, E. ; Choudhary, B. C. ; Christensen, A. ; Coan, T. E. ; Colo, M. ; Corwin, L. ; Cremonesi, L. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Dolce, M. ; Doyle, D. ; Dueñas Tonguino, D. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Elkins, M. ; Ewart, E. ; Feldman, G. J. ; Filip, P. ; Franc, J. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hall, A. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Hausner, H. ; Heller, K. ; Hewes, J. ; Himmel, A. ; Holin, A. ; Huang, J. ; Jargowsky, B. ; Jarosz, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Kalitkina, A. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kralik, R. ; Kullenberg, Ch ; Kubu, M. ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lasorak, P. ; Lesmeister, J. ; Lin, S. ; Lister, A.
    A search is performed for supernovalike neutrino interactions coincident with 76 gravitational wave events detected by the LIGO/Virgo Collaboration. For 40 of these events, full readout of the time around the gravitational wave is available from the NOvA Far Detector. For these events, we set limits on the fluence of the sum of all neutrino flavors of F < 7(4)×1010 cm-2 at 90% C.L. assuming energy and time distributions corresponding to the Garching supernova models with masses 9.6(27) M⊙. Under the hypothesis that any given gravitational wave event was caused by a supernova, this corresponds to a distance of r > 29(50) kpc at 90% C.L. Weaker limits are set for other gravitational wave events with partial Far Detector data and/or Near Detector data.
  • Item
    First measurement of electron neutrino appearance in NOvA
    ( 2016-04-13) Adamson, P. ; Ader, C. ; Andrews, M. ; Anfimov, N. ; Anghel, I. ; Arms, K. ; Arrieta-Diaz, E. ; Aurisano, A. ; Ayres, D. S. ; Backhouse, C. ; Baird, M. ; Bambah, B. A. ; Bays, K. ; Bernstein, R. ; Betancourt, M. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Biery, K. ; Blackburn, T. ; Bocean, V. ; Bogert, D. ; Bolshakova, A. ; Bowden, M. ; Bower, C. ; Broemmelsiek, D. ; Bromberg, C. ; Brunetti, G. ; Bu, X. ; Butkevich, A. ; Capista, D. ; Catano-Mur, E. ; Chase, T. R. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Coelho, J. A.B. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cronin-Hennessy, D. ; Cunningham, A. ; Davies, G. S. ; Davies, J. P. ; Del Tutto, M. ; Derwent, P. F. ; Deepthi, K. N. ; Demuth, D. ; Desai, S. ; Deuerling, G. ; Devan, A. ; Dey, J. ; Dharmapalan, R. ; Ding, P. ; Dixon, S. ; Djurcic, Z. ; Dukes, E. C. ; Duyang, H. ; Ehrlich, R. ; Feldman, G. J. ; Felt, N. ; Fenyves, E. J. ; Flumerfelt, E. ; Foulkes, S. ; Frank, M. J. ; Freeman, W. ; Gabrielyan, M. ; Gallagher, H. R. ; Gebhard, M. ; Ghosh, T. ; Gilbert, W. ; Giri, A. ; Goadhouse, S. ; Gomes, R. A. ; Goodenough, L. ; Goodman, M. C. ; Grichine, V. ; Grossman, N. ; Group, R. ; Grudzinski, J. ; Guarino, V. ; Guo, B. ; Habig, A. ; Handler, T. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Howcroft, C. ; Huang, J. ; Huang, X. ; Hylen, J. ; Ishitsuka, M. ; Jediny, F. ; Jensen, C. ; Jensen, D. ; Johnson, C. ; Jostlein, H. ; Kafka, G. K.
    We report results from the first search for νμ→νe transitions by the NOvA experiment. In an exposure equivalent to 2.74×1020 protons on target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of 0.99±0.11(syst) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of 1.07±0.14(syst). The 3.3σ excess of events observed in the primary analysis disfavors 0.1π < δCP < 0.5π in the inverted mass hierarchy at the 90% C.L.
  • Item
    First measurement of electron neutrino appearance in NOvA
    ( 2016-04-13) Adamson, P. ; Ader, C. ; Andrews, M. ; Anfimov, N. ; Anghel, I. ; Arms, K. ; Arrieta-Diaz, E. ; Aurisano, A. ; Ayres, D. S. ; Backhouse, C. ; Baird, M. ; Bambah, B. A. ; Bays, K. ; Bernstein, R. ; Betancourt, M. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Biery, K. ; Blackburn, T. ; Bocean, V. ; Bogert, D. ; Bolshakova, A. ; Bowden, M. ; Bower, C. ; Broemmelsiek, D. ; Bromberg, C. ; Brunetti, G. ; Bu, X. ; Butkevich, A. ; Capista, D. ; Catano-Mur, E. ; Chase, T. R. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Coelho, J. A.B. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cronin-Hennessy, D. ; Cunningham, A. ; Davies, G. S. ; Davies, J. P. ; Del Tutto, M. ; Derwent, P. F. ; Deepthi, K. N. ; Demuth, D. ; Desai, S. ; Deuerling, G. ; Devan, A. ; Dey, J. ; Dharmapalan, R. ; Ding, P. ; Dixon, S. ; Djurcic, Z. ; Dukes, E. C. ; Duyang, H. ; Ehrlich, R. ; Feldman, G. J. ; Felt, N. ; Fenyves, E. J. ; Flumerfelt, E. ; Foulkes, S. ; Frank, M. J. ; Freeman, W. ; Gabrielyan, M. ; Gallagher, H. R. ; Gebhard, M. ; Ghosh, T. ; Gilbert, W. ; Giri, A. ; Goadhouse, S. ; Gomes, R. A. ; Goodenough, L. ; Goodman, M. C. ; Grichine, V. ; Grossman, N. ; Group, R. ; Grudzinski, J. ; Guarino, V. ; Guo, B. ; Habig, A. ; Handler, T. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Howcroft, C. ; Huang, J. ; Huang, X. ; Hylen, J. ; Ishitsuka, M. ; Jediny, F. ; Jensen, C. ; Jensen, D. ; Johnson, C. ; Jostlein, H. ; Kafka, G. K.
    We report results from the first search for νμ→νe transitions by the NOvA experiment. In an exposure equivalent to 2.74×1020 protons on target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of 0.99±0.11(syst) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of 1.07±0.14(syst). The 3.3σ excess of events observed in the primary analysis disfavors 0.1π < δCP < 0.5π in the inverted mass hierarchy at the 90% C.L.
  • Item
    First measurement of muon-neutrino disappearance in NOvA
    ( 2016-03-25) Adamson, P. ; Ader, C. ; Andrews, M. ; Anfimov, N. ; Anghel, I. ; Arms, K. ; Arrieta-Diaz, E. ; Aurisano, A. ; Ayres, D. S. ; Backhouse, C. ; Baird, M. ; Bambah, B. A. ; Bays, K. ; Bernstein, R. ; Betancourt, M. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Biery, K. ; Blackburn, T. ; Bocean, V. ; Bogert, D. ; Bolshakova, A. ; Bowden, M. ; Bower, C. ; Broemmelsiek, D. ; Bromberg, C. ; Brunetti, G. ; Bu, X. ; Butkevich, A. ; Capista, D. ; Catano-Mur, E. ; Chase, T. R. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Coelho, J. A.B. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cronin-Hennessy, D. ; Cunningham, A. ; Davies, G. S. ; Davies, J. P. ; Del Tutto, M. ; Derwent, P. F. ; Deepthi, K. N. ; Demuth, D. ; Desai, S. ; Deuerling, G. ; Devan, A. ; Dey, J. ; Dharmapalan, R. ; Ding, P. ; Dixon, S. ; Djurcic, Z. ; Dukes, E. C. ; Duyang, H. ; Ehrlich, R. ; Feldman, G. J. ; Felt, N. ; Fenyves, E. J. ; Flumerfelt, E. ; Foulkes, S. ; Frank, M. J. ; Freeman, W. ; Gabrielyan, M. ; Gallagher, H. R. ; Gebhard, M. ; Ghosh, T. ; Gilbert, W. ; Giri, A. ; Goadhouse, S. ; Gomes, R. A. ; Goodenough, L. ; Goodman, M. C. ; Grichine, V. ; Grossman, N. ; Group, R. ; Grudzinski, J. ; Guarino, V. ; Guo, B. ; Habig, A. ; Handler, T. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Howcroft, C. ; Huang, J. ; Huang, X. ; Hylen, J. ; Ishitsuka, M. ; Jediny, F. ; Jensen, C. ; Jensen, D. ; Johnson, C. ; Jostlein, H. ; Kafka, G. K.
    This paper reports the first measurement using the NOvA detectors of νμ disappearance in a νμ beam. The analysis uses a 14 kton-equivalent exposure of 2.74×1020 protons-on-target from the Fermilab NuMI beam. Assuming the normal neutrino mass hierarchy, we measure Δm322=(2.52-0.18+0.20)×10-3 eV2 and sin2θ23 in the range 0.38-0.65, both at the 68% confidence level, with two statistically degenerate best-fit points at sin2θ23=0.43 and 0.60. Results for the inverted mass hierarchy are also presented.
  • Item
    First measurement of muon-neutrino disappearance in NOvA
    ( 2016-03-25) Adamson, P. ; Ader, C. ; Andrews, M. ; Anfimov, N. ; Anghel, I. ; Arms, K. ; Arrieta-Diaz, E. ; Aurisano, A. ; Ayres, D. S. ; Backhouse, C. ; Baird, M. ; Bambah, B. A. ; Bays, K. ; Bernstein, R. ; Betancourt, M. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Biery, K. ; Blackburn, T. ; Bocean, V. ; Bogert, D. ; Bolshakova, A. ; Bowden, M. ; Bower, C. ; Broemmelsiek, D. ; Bromberg, C. ; Brunetti, G. ; Bu, X. ; Butkevich, A. ; Capista, D. ; Catano-Mur, E. ; Chase, T. R. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Coelho, J. A.B. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cronin-Hennessy, D. ; Cunningham, A. ; Davies, G. S. ; Davies, J. P. ; Del Tutto, M. ; Derwent, P. F. ; Deepthi, K. N. ; Demuth, D. ; Desai, S. ; Deuerling, G. ; Devan, A. ; Dey, J. ; Dharmapalan, R. ; Ding, P. ; Dixon, S. ; Djurcic, Z. ; Dukes, E. C. ; Duyang, H. ; Ehrlich, R. ; Feldman, G. J. ; Felt, N. ; Fenyves, E. J. ; Flumerfelt, E. ; Foulkes, S. ; Frank, M. J. ; Freeman, W. ; Gabrielyan, M. ; Gallagher, H. R. ; Gebhard, M. ; Ghosh, T. ; Gilbert, W. ; Giri, A. ; Goadhouse, S. ; Gomes, R. A. ; Goodenough, L. ; Goodman, M. C. ; Grichine, V. ; Grossman, N. ; Group, R. ; Grudzinski, J. ; Guarino, V. ; Guo, B. ; Habig, A. ; Handler, T. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Howcroft, C. ; Huang, J. ; Huang, X. ; Hylen, J. ; Ishitsuka, M. ; Jediny, F. ; Jensen, C. ; Jensen, D. ; Johnson, C. ; Jostlein, H. ; Kafka, G. K.
    This paper reports the first measurement using the NOvA detectors of νμ disappearance in a νμ beam. The analysis uses a 14 kton-equivalent exposure of 2.74×1020 protons-on-target from the Fermilab NuMI beam. Assuming the normal neutrino mass hierarchy, we measure Δm322=(2.52-0.18+0.20)×10-3 eV2 and sin2θ23 in the range 0.38-0.65, both at the 68% confidence level, with two statistically degenerate best-fit points at sin2θ23=0.43 and 0.60. Results for the inverted mass hierarchy are also presented.
  • Item
    First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA
    ( 2019-10-11) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Altakarli, S. ; Anfimov, N. ; Antoshkin, A. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Bashar, S. ; Bays, K. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Blair, J. ; Booth, A. C. ; Bour, P. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Calvez, S. ; Campbell, M. ; Carroll, T. J. ; Catano-Mur, E. ; Cedeno, A. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cremonesi, L. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Doyle, D. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Elkins, M. ; Feldman, G. J. ; Filip, P. ; Flanagan, W. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Hewes, J. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kourbanis, I. ; Kreymer, A. ; Kulenberg, Ch ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lin, S. ; Lokajicek, M.
    The NOvA experiment has seen a 4.4σ signal of ν̄e appearance in a 2 GeV ν̄μ beam at a distance of 810 km. Using 12.33×1020 protons on target delivered to the Fermilab NuMI neutrino beamline, the experiment recorded 27 ν̄μ→ν̄e candidates with a background of 10.3 and 102 ν̄μ→ν̄μ candidates. This new antineutrino data are combined with neutrino data to measure the parameters |Δm322|=2.48-0.06+0.11×10-3 eV2/c4 and sin2θ23 in the ranges from (0.53-0.60) and (0.45-0.48) in the normal neutrino mass hierarchy. The data exclude most values near δCP=π/2 for the inverted mass hierarchy by more than 3σ and favor the normal neutrino mass hierarchy by 1.9σ and θ23 values in the upper octant by 1.6σ.
  • Item
    First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA
    ( 2019-10-11) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Altakarli, S. ; Anfimov, N. ; Antoshkin, A. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Bashar, S. ; Bays, K. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Blair, J. ; Booth, A. C. ; Bour, P. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Calvez, S. ; Campbell, M. ; Carroll, T. J. ; Catano-Mur, E. ; Cedeno, A. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cremonesi, L. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Doyle, D. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Elkins, M. ; Feldman, G. J. ; Filip, P. ; Flanagan, W. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Hewes, J. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kourbanis, I. ; Kreymer, A. ; Kulenberg, Ch ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lin, S. ; Lokajicek, M.
    The NOvA experiment has seen a 4.4σ signal of ν̄e appearance in a 2 GeV ν̄μ beam at a distance of 810 km. Using 12.33×1020 protons on target delivered to the Fermilab NuMI neutrino beamline, the experiment recorded 27 ν̄μ→ν̄e candidates with a background of 10.3 and 102 ν̄μ→ν̄μ candidates. This new antineutrino data are combined with neutrino data to measure the parameters |Δm322|=2.48-0.06+0.11×10-3 eV2/c4 and sin2θ23 in the ranges from (0.53-0.60) and (0.45-0.48) in the normal neutrino mass hierarchy. The data exclude most values near δCP=π/2 for the inverted mass hierarchy by more than 3σ and favor the normal neutrino mass hierarchy by 1.9σ and θ23 values in the upper octant by 1.6σ.
  • Item
    Measurement of neutrino-induced neutral-current coherent π0 production in the NOvA near detector
    ( 2020-07-01) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Basher, S. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blair, J. ; Booth, A. C. ; Bolshakova, A. ; Bour, P. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Campbell, M. ; Carroll, T. J. ; Catano-Mur, E. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Colo, M. ; Corwin, L. ; Cremonesi, L. ; Cronin-Hennessy, D. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Doyle, D. ; Dukes, E. C. ; Dung, P. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Flanagan, W. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kreymer, A. ; Kullenberg, Ch ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lin, S. ; Lokajicek, M. ; Lozier, J. ; Luchuk, S. ; Maan, K. ; Magill, S.
    The cross section of neutrino-induced neutral-current coherent π0 production on a carbon-dominated target is measured in the NOvA near detector. This measurement uses a narrow-band neutrino beam with an average neutrino energy of 2.7 GeV, which is of interest to ongoing and future long-baseline neutrino oscillation experiments. The measured, flux-averaged cross section is σ=13.8±0.9(stat)±2.3(syst)×10-40 cm2/nucleus, consistent with model prediction. This result is the most precise measurement of neutral-current coherent π0 production in the few-GeV neutrino energy region.
  • Item
    Measurement of neutrino-induced neutral-current coherent π0 production in the NOvA near detector
    ( 2020-07-01) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Basher, S. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blair, J. ; Booth, A. C. ; Bolshakova, A. ; Bour, P. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Campbell, M. ; Carroll, T. J. ; Catano-Mur, E. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Colo, M. ; Corwin, L. ; Cremonesi, L. ; Cronin-Hennessy, D. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Doyle, D. ; Dukes, E. C. ; Dung, P. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Flanagan, W. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kreymer, A. ; Kullenberg, Ch ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lin, S. ; Lokajicek, M. ; Lozier, J. ; Luchuk, S. ; Maan, K. ; Magill, S.
    The cross section of neutrino-induced neutral-current coherent π0 production on a carbon-dominated target is measured in the NOvA near detector. This measurement uses a narrow-band neutrino beam with an average neutrino energy of 2.7 GeV, which is of interest to ongoing and future long-baseline neutrino oscillation experiments. The measured, flux-averaged cross section is σ=13.8±0.9(stat)±2.3(syst)×10-40 cm2/nucleus, consistent with model prediction. This result is the most precise measurement of neutral-current coherent π0 production in the few-GeV neutrino energy region.
  • Item
    Measurement of the Neutrino Mixing Angle θ23 in NOvA
    ( 2017-04-10) Adamson, P. ; Aliaga, L. ; Ambrose, D. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Augsten, K. ; Aurisano, A. ; Backhouse, C. ; Baird, M. ; Bambah, B. A. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Bolshakova, A. ; Bromberg, C. ; Brown, J. ; Brunetti, G. ; Buchanan, N. ; Butkevich, A. ; Bychkov, V. ; Campbell, M. ; Catano-Mur, E. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Coelho, J. A.B. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cremonesi, L. ; Cronin-Hennessy, D. ; Davies, G. S. ; Davies, J. P. ; Derwent, P. F. ; Desai, S. ; Dharmapalan, R. ; Ding, P. ; Djurcic, Z. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Frank, M. J. ; Gabrielyan, M. ; Gallagher, H. R. ; Germani, S. ; Ghosh, T. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Group, R. ; Grover, D. ; Guo, B. ; Habig, A. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Himmel, A. ; Holin, A. ; Hylen, J. ; Jediny, F. ; Judah, M. ; Kafka, G. K. ; Kalra, D. ; Kasahara, S. M.S. ; Kasetti, S. ; Keloth, R. ; Kolupaeva, L. ; Kotelnikov, S. ; Kourbanis, I. ; Kreymer, A. ; Kumar, A. ; Kurbanov, S. ; Lang, K. ; Lee, W. M. ; Lin, S. ; Liu, J. ; Lokajicek, M. ; Lozier, J. ; Luchuk, S. ; Maan, K. ; Magill, S. ; Mann, W. A. ; Marshak, M. L. ; Matera, K. ; Matveev, V. ; Méndez, D. P. ; Messier, M. D. ; Meyer, H. ; Miao, T.
    This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×1020 protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ23 mixing (θ23=π/4). Assuming the normal mass hierarchy, we find Δm322=(2.67±0.11)×10-3 eV2 and sin2θ23 at the two statistically degenerate values 0.404-0.022+0.030 and 0.624-0.030+0.022, both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.
  • Item
    Measurement of the Neutrino Mixing Angle θ23 in NOvA
    ( 2017-04-10) Adamson, P. ; Aliaga, L. ; Ambrose, D. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Augsten, K. ; Aurisano, A. ; Backhouse, C. ; Baird, M. ; Bambah, B. A. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Bolshakova, A. ; Bromberg, C. ; Brown, J. ; Brunetti, G. ; Buchanan, N. ; Butkevich, A. ; Bychkov, V. ; Campbell, M. ; Catano-Mur, E. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Coelho, J. A.B. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cremonesi, L. ; Cronin-Hennessy, D. ; Davies, G. S. ; Davies, J. P. ; Derwent, P. F. ; Desai, S. ; Dharmapalan, R. ; Ding, P. ; Djurcic, Z. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Frank, M. J. ; Gabrielyan, M. ; Gallagher, H. R. ; Germani, S. ; Ghosh, T. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Group, R. ; Grover, D. ; Guo, B. ; Habig, A. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Himmel, A. ; Holin, A. ; Hylen, J. ; Jediny, F. ; Judah, M. ; Kafka, G. K. ; Kalra, D. ; Kasahara, S. M.S. ; Kasetti, S. ; Keloth, R. ; Kolupaeva, L. ; Kotelnikov, S. ; Kourbanis, I. ; Kreymer, A. ; Kumar, A. ; Kurbanov, S. ; Lang, K. ; Lee, W. M. ; Lin, S. ; Liu, J. ; Lokajicek, M. ; Lozier, J. ; Luchuk, S. ; Maan, K. ; Magill, S. ; Mann, W. A. ; Marshak, M. L. ; Matera, K. ; Matveev, V. ; Méndez, D. P. ; Messier, M. D. ; Meyer, H. ; Miao, T.
    This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×1020 protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ23 mixing (θ23=π/4). Assuming the normal mass hierarchy, we find Δm322=(2.67±0.11)×10-3 eV2 and sin2θ23 at the two statistically degenerate values 0.404-0.022+0.030 and 0.624-0.030+0.022, both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.
  • Item
    New constraints on oscillation parameters from νe appearance and νμ disappearance in the NOvA experiment
    ( 2018-08-01) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Bambah, B. A. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Blair, J. ; Bolshakova, A. ; Bour, P. ; Bromberg, C. ; Brown, J. ; Buchanan, N. ; Butkevich, A. ; Bychkov, V. ; Campbell, M. ; Carroll, T. J. ; Catano-Mur, E. ; Cedeno, A. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cremonesi, L. ; Cronin-Hennessy, D. ; Davies, G. S. ; Davies, J. P. ; De Rijck, S. ; Derwent, P. F. ; Dharmapalan, R. ; Ding, P. ; Djurcic, Z. ; Dukes, E. C. ; Dung, P. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Grover, D. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kourbanis, I. ; Kreymer, A. ; Kulenberg, Ch ; Kumar, A. ; Kuruppu, C. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lin, S. ; Lokajicek, M.
    We present updated results from the NOvA experiment for νμ→νμ and νμ→νe oscillations from an exposure of 8.85×1020 protons on target, which represents an increase of 46% compared to our previous publication. The results utilize significant improvements in both the simulations and analysis of the data. A joint fit to the data for νμ disappearance and νe appearance gives the best-fit point as normal mass hierarchy, Δm322=2.44×10-3 eV2/c4, sin2θ23=0.56, and δCP=1.21π. The 68.3% confidence intervals in the normal mass hierarchy are Δm322[2.37,2.52]×10-3 eV2/c4, sin2θ23[0.43,0.51][0.52,0.60], and δCP[0,0.12π][0.91π,2π]. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.
  • Item
    New constraints on oscillation parameters from νe appearance and νμ disappearance in the NOvA experiment
    ( 2018-08-01) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Bambah, B. A. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Blair, J. ; Bolshakova, A. ; Bour, P. ; Bromberg, C. ; Brown, J. ; Buchanan, N. ; Butkevich, A. ; Bychkov, V. ; Campbell, M. ; Carroll, T. J. ; Catano-Mur, E. ; Cedeno, A. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Colo, M. ; Cooper, J. ; Corwin, L. ; Cremonesi, L. ; Cronin-Hennessy, D. ; Davies, G. S. ; Davies, J. P. ; De Rijck, S. ; Derwent, P. F. ; Dharmapalan, R. ; Ding, P. ; Djurcic, Z. ; Dukes, E. C. ; Dung, P. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Grover, D. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kourbanis, I. ; Kreymer, A. ; Kulenberg, Ch ; Kumar, A. ; Kuruppu, C. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lin, S. ; Lokajicek, M.
    We present updated results from the NOvA experiment for νμ→νμ and νμ→νe oscillations from an exposure of 8.85×1020 protons on target, which represents an increase of 46% compared to our previous publication. The results utilize significant improvements in both the simulations and analysis of the data. A joint fit to the data for νμ disappearance and νe appearance gives the best-fit point as normal mass hierarchy, Δm322=2.44×10-3 eV2/c4, sin2θ23=0.56, and δCP=1.21π. The 68.3% confidence intervals in the normal mass hierarchy are Δm322[2.37,2.52]×10-3 eV2/c4, sin2θ23[0.43,0.51][0.52,0.60], and δCP[0,0.12π][0.91π,2π]. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.
  • Item
    Observation of seasonal variation of atmospheric multiple-muon events in the NOvA Near Detector
    ( 2019-06-28) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Altakarli, S. ; Anfimov, N. ; Antoshkin, A. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Bashar, S. ; Bays, K. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blair, J. ; Booth, A. C. ; Bour, P. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Calvez, S. ; Campbell, M. ; Carroll, T. J. ; Catano-Mur, E. ; Cedeno, A. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Colo, M. ; Corwin, L. ; Cremonesi, L. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Doyle, D. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Filip, P. ; Flanagan, W. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Hewes, J. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kreymer, A. ; Kulenberg, Ch ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lin, S. ; Lokajicek, M. ; Lozier, J. ; Luchuk, S. ; Magill, S. ; Mann, W. A.
    Using two years of data from the NOvA Near Detector at Fermilab, we report a seasonal variation of cosmic ray induced multiple-muon (Nμ≥2) event rates which has an opposite phase to the seasonal variation in the atmospheric temperature. The strength of the seasonal multiple-muon variation is shown to increase as a function of the muon multiplicity. However, no significant dependence of the strength of the seasonal variation of the multiple-muon variation is seen as a function of the muon zenith angle, or the spatial or angular separation between the correlated muons.
  • Item
    Observation of seasonal variation of atmospheric multiple-muon events in the NOvA Near Detector
    ( 2019-06-28) Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Altakarli, S. ; Anfimov, N. ; Antoshkin, A. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Baldi, P. ; Bambah, B. A. ; Bashar, S. ; Bays, K. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blair, J. ; Booth, A. C. ; Bour, P. ; Bromberg, C. ; Buchanan, N. ; Butkevich, A. ; Calvez, S. ; Campbell, M. ; Carroll, T. J. ; Catano-Mur, E. ; Cedeno, A. ; Childress, S. ; Choudhary, B. C. ; Chowdhury, B. ; Coan, T. E. ; Colo, M. ; Corwin, L. ; Cremonesi, L. ; Davies, G. S. ; Derwent, P. F. ; Ding, P. ; Djurcic, Z. ; Doyle, D. ; Dukes, E. C. ; Duyang, H. ; Edayath, S. ; Ehrlich, R. ; Feldman, G. J. ; Filip, P. ; Flanagan, W. ; Frank, M. J. ; Gallagher, H. R. ; Gandrajula, R. ; Gao, F. ; Germani, S. ; Giri, A. ; Gomes, R. A. ; Goodman, M. C. ; Grichine, V. ; Groh, M. ; Group, R. ; Guo, B. ; Habig, A. ; Hakl, F. ; Hartnell, J. ; Hatcher, R. ; Hatzikoutelis, A. ; Heller, K. ; Hewes, J. ; Himmel, A. ; Holin, A. ; Howard, B. ; Huang, J. ; Hylen, J. ; Jediny, F. ; Johnson, C. ; Judah, M. ; Kakorin, I. ; Kalra, D. ; Kaplan, D. M. ; Keloth, R. ; Klimov, O. ; Koerner, L. W. ; Kolupaeva, L. ; Kotelnikov, S. ; Kreymer, A. ; Kulenberg, Ch ; Kumar, A. ; Kuruppu, C. D. ; Kus, V. ; Lackey, T. ; Lang, K. ; Lin, S. ; Lokajicek, M. ; Lozier, J. ; Luchuk, S. ; Magill, S. ; Mann, W. A.
    Using two years of data from the NOvA Near Detector at Fermilab, we report a seasonal variation of cosmic ray induced multiple-muon (Nμ≥2) event rates which has an opposite phase to the seasonal variation in the atmospheric temperature. The strength of the seasonal multiple-muon variation is shown to increase as a function of the muon multiplicity. However, no significant dependence of the strength of the seasonal variation of the multiple-muon variation is seen as a function of the muon zenith angle, or the spatial or angular separation between the correlated muons.