Centre for Advanced Studies in Electronics Science and Technology

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Browsing Centre for Advanced Studies in Electronics Science and Technology by Subject "2HDM"
  • Item
    Search for a pseudoscalar boson decaying into a Z boson and the 125 GeV Higgs boson in ℓ < sup > + < /sup > ℓ < sup > − < /sup > bb‾ final states
    ( 2015-09-02) Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Asilar, E. ; Bergauer, T. ; Brandstetter, J. ; Brondolin, E. ; Dragicevic, M. ; Erö, J. ; Flechl, M. ; Friedl, M. ; Frühwirth, R. ; Ghete, V. M. ; Hartl, C. ; Hörmann, N. ; Hrubec, J. ; Jeitler, M. ; Knünz, V. ; König, A. ; Krammer, M. ; Krätschmer, I. ; Liko, D. ; Matsushita, T. ; Mikulec, I. ; Rabady, D. ; Rahbaran, B. ; Rohringer, H. ; Schieck, J. ; Schöfbeck, R. ; Strauss, J. ; Treberer-Treberspurg, W. ; Waltenberger, W. ; Wulz, C. E. ; Mossolov, V. ; Shumeiko, N. ; Suarez Gonzalez, J. ; Alderweireldt, S. ; Cornelis, T. ; De Wolf, E. A. ; Janssen, X. ; Knutsson, A. ; Lauwers, J. ; Luyckx, S. ; Ochesanu, S. ; Rougny, R. ; Van De Klundert, M. ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Remortel, N. ; Van Spilbeeck, A. ; Abu Zeid, S. ; Blekman, F. ; D'Hondt, J. ; Daci, N. ; De Bruyn, I. ; Deroover, K. ; Heracleous, N. ; Keaveney, J. ; Lowette, S. ; Moreels, L. ; Olbrechts, A. ; Python, Q. ; Strom, D. ; Tavernier, S. ; Van Doninck, W. ; Van Mulders, P. ; Van Onsem, G. P. ; Van Parijs, I. ; Barria, P. ; Caillol, C. ; Clerbaux, B. ; De Lentdecker, G. ; Delannoy, H. ; Dobur, D. ; Fasanella, G. ; Favart, L. ; Gay, A. P.R. ; Grebenyuk, A. ; Léonard, A. ; Mohammadi, A. ; Perniè, L. ; Randle-conde, A. ; Reis, T. ; Seva, T. ; Thomas, L. ; Vander Velde, C. ; Vanlaer, P. ; Wang, J. ; Zenoni, F. ; Beernaert, K. ; Benucci, L. ; Cimmino, A. ; Crucy, S. ; Fagot, A. ; Garcia, G. ; Gul, M. ; Mccartin, J. ; Ocampo Rios, A. A. ; Poyraz, D.
    Results are reported on a search for decays of a pseudoscalar A boson into a Z boson and a light scalar h boson, where the Z boson decays into a pair of oppositely-charged electrons or muons, and the h boson decays into bb‾. The search is based on data from proton–proton collisions at a center-of-mass energy s=8 TeV collected with the CMS detector, corresponding to an integrated luminosity of 19.7 fb−1. The h boson is assumed to be the standard model-like Higgs boson with a mass of 125 GeV. With no evidence for signal, upper limits are obtained on the product of the production cross section and the branching fraction of the A boson in the Zh channel. Results are also interpreted in the context of two Higgs doublet models.
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    Search for diphoton resonances in the mass range from 150 to 850 GeV in pp collisions at s=8TeV
    ( 2015-11-12) Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Asilar, E. ; Bergauer, T. ; Brandstetter, J. ; Brondolin, E. ; Dragicevic, M. ; Erö, J. ; Flechl, M. ; Friedl, M. ; Frühwirth, R. ; Ghete, V. M. ; Hartl, C. ; Hörmann, N. ; Hrubec, J. ; Jeitler, M. ; Knünz, V. ; König, A. ; Krammer, M. ; Krätschmer, I. ; Liko, D. ; Matsushita, T. ; Mikulec, I. ; Rabady, D. ; Rahbaran, B. ; Rohringer, H. ; Schieck, J. ; Schöfbeck, R. ; Strauss, J. ; Treberer-Treberspurg, W. ; Waltenberger, W. ; Wulz, C. E. ; Mossolov, V. ; Shumeiko, N. ; Suarez Gonzalez, J. ; Alderweireldt, S. ; Cornelis, T. ; De Wolf, E. A. ; Janssen, X. ; Knutsson, A. ; Lauwers, J. ; Luyckx, S. ; Ochesanu, S. ; Rougny, R. ; Van De Klundert, M. ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Remortel, N. ; Van Spilbeeck, A. ; Abu Zeid, S. ; Blekman, F. ; D'Hondt, J. ; Daci, N. ; De Bruyn, I. ; Deroover, K. ; Heracleous, N. ; Keaveney, J. ; Lowette, S. ; Moreels, L. ; Olbrechts, A. ; Python, Q. ; Strom, D. ; Tavernier, S. ; Van Doninck, W. ; Van Mulders, P. ; Van Onsem, G. P. ; Van Parijs, I. ; Barria, P. ; Caillol, C. ; Clerbaux, B. ; De Lentdecker, G. ; Delannoy, H. ; Dobur, D. ; Fasanella, G. ; Favart, L. ; Gay, A. P.R. ; Grebenyuk, A. ; Lenzi, T. ; Léonard, A. ; Maerschalk, T. ; Mohammadi, A. ; Perniè, L. ; Randle-conde, A. ; Reis, T. ; Seva, T. ; Thomas, L. ; Vander Velde, C. ; Vanlaer, P. ; Wang, J. ; Zenoni, F. ; Zhang, F. ; Beernaert, K. ; Benucci, L. ; Cimmino, A. ; Crucy, S. ; Fagot, A. ; Garcia, G. ; Gul, M.
    Results are presented of a search for heavy particles decaying into two photons. The analysis is based on a 19.7fb−1 sample of proton–proton collisions at s=8TeV collected with the CMS detector at the CERN LHC. The diphoton mass spectrum from 150 to 850GeV is used to search for an excess of events over the background. The search is extended to new resonances with natural widths of up to 10% of the mass value. No evidence for new particle production is observed and limits at 95% confidence level on the production cross section times branching fraction to diphotons are determined. These limits are interpreted in terms of two-Higgs-doublet model parameters.
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    Search for neutral resonances decaying into a Z boson and a pair of b jets or τ leptons
    ( 2016-08-10) Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Asilar, E. ; Bergauer, T. ; Brandstetter, J. ; Brondolin, E. ; Dragicevic, M. ; Erö, J. ; Flechl, M. ; Friedl, M. ; Frühwirth, R. ; Ghete, V. M. ; Hartl, C. ; Hörmann, N. ; Hrubec, J. ; Jeitler, M. ; Knünz, V. ; König, A. ; Krammer, M. ; Krätschmer, I. ; Liko, D. ; Matsushita, T. ; Mikulec, I. ; Rabady, D. ; Rahbaran, B. ; Rohringer, H. ; Schieck, J. ; Schöfbeck, R. ; Strauss, J. ; Treberer-Treberspurg, W. ; Waltenberger, W. ; Wulz, C. E. ; Mossolov, V. ; Shumeiko, N. ; Suarez Gonzalez, J. ; Alderweireldt, S. ; Cornelis, T. ; De Wolf, E. A. ; Janssen, X. ; Knutsson, A. ; Lauwers, J. ; Luyckx, S. ; Van De Klundert, M. ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Remortel, N. ; Van Spilbeeck, A. ; Abu Zeid, S. ; Blekman, F. ; D'Hondt, J. ; Daci, N. ; De Bruyn, I. ; Deroover, K. ; Heracleous, N. ; Keaveney, J. ; Lowette, S. ; Moreels, L. ; Olbrechts, A. ; Python, Q. ; Strom, D. ; Tavernier, S. ; Van Doninck, W. ; Van Mulders, P. ; Van Onsem, G. P. ; Van Parijs, I. ; Barria, P. ; Brun, H. ; Caillol, C. ; Clerbaux, B. ; De Lentdecker, G. ; Fasanella, G. ; Favart, L. ; Grebenyuk, A. ; Karapostoli, G. ; Lenzi, T. ; Léonard, A. ; Maerschalk, T. ; Marinov, A. ; Perniè, L. ; Randle-Conde, A. ; Seva, T. ; Vander Velde, C. ; Vanlaer, P. ; Yonamine, R. ; Zenoni, F. ; Zhang, F. ; Beernaert, K. ; Benucci, L. ; Cimmino, A. ; Crucy, S. ; Dobur, D. ; Fagot, A. ; Garcia, G. ; Gul, M. ; Mccartin, J. ; Ocampo Rios, A. A. ; Poyraz, D. ; Ryckbosch, D.
    A search is performed for a new resonance decaying into a lighter resonance and a Z boson. Two channels are studied, targeting the decay of the lighter resonance into either a pair of oppositely charged τ leptons or a bb‾ pair. The Z boson is identified via its decays to electrons or muons. The search exploits data collected by the CMS experiment at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.8 fb−1. No significant deviations are observed from the standard model expectation and limits are set on production cross sections and parameters of two-Higgs-doublet models.