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Browsing Electronics Science and Technology - Publications by Subject "3-jet mass"
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    Measurement of the inclusive 3-jet production differential cross section in proton–proton collisions at 7 TeV and determination of the strong coupling constant in the TeV range
    ( 2015-05-01) Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Bergauer, T. ; Dragicevic, M. ; Erö, J. ; Fabjan, C. ; Friedl, M. ; Frühwirth, R. ; Ghete, V. M. ; Hartl, C. ; Hörmann, N. ; Hrubec, J. ; Jeitler, M. ; Kiesenhofer, W. ; Knünz, V. ; Krammer, M. ; Krätschmer, I. ; Liko, D. ; Mikulec, I. ; Rabady, D. ; Rahbaran, B. ; Rohringer, H. ; Schöfbeck, R. ; Strauss, J. ; Taurok, A. ; Treberer-Treberspurg, W. ; Waltenberger, W. ; Wulz, C. E. ; Mossolov, V. ; Shumeiko, N. ; Suarez Gonzalez, J. ; Alderweireldt, S. ; Bansal, M. ; Bansal, S. ; Cornelis, T. ; De Wolf, E. A. ; Janssen, X. ; Knutsson, A. ; Luyckx, S. ; Ochesanu, S. ; Rougny, R. ; Van De Klundert, M. ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Remortel, N. ; Van Spilbeeck, A. ; Blekman, F. ; Blyweert, S. ; D’Hondt, J. ; Daci, N. ; Heracleous, N. ; Keaveney, J. ; Lowette, S. ; Maes, M. ; Olbrechts, A. ; Python, Q. ; Strom, D. ; Tavernier, S. ; Van Doninck, W. ; Van Mulders, P. ; Van Onsem, G. P. ; Villella, I. ; Caillol, C. ; Clerbaux, B. ; De Lentdecker, G. ; Dobur, D. ; Favart, L. ; Gay, A. P.R. ; Grebenyuk, A. ; Léonard, A. ; Mohammadi, A. ; Perniè, L. ; Reis, T. ; Seva, T. ; Thomas, L. ; Vander Velde, C. ; Vanlaer, P. ; Wang, J. ; Zenoni, F. ; Adler, V. ; Beernaert, K. ; Benucci, L. ; Cimmino, A. ; Costantini, S. ; Crucy, S. ; Dildick, S. ; Fagot, A. ; Garcia, G. ; Mccartin, J. ; Ocampo Rios, A. A. ; Ryckbosch, D. ; Salva Diblen, S. ; Sigamani, M. ; Strobbe, N. ; Thyssen, F. ; Tytgat, M. ; Yazgan, E. ; Zaganidis, N.
    This paper presents a measurement of the inclusive 3-jet production differential cross section at a proton–proton centre-of-mass energy of 7 TeV using data corresponding to an integrated luminosity of 5$$\,\mathrm{fb}^{-1}$$fb-1collected with the CMS detector. The analysis is based on the three jets with the highest transverse momenta. The cross section is measured as a function of the invariant mass of the three jets in a range of 445–3270 GeV and in two bins of the maximum rapidity of the jets up to a value of 2. A comparison between the measurement and the prediction from perturbative QCD at next-to-leading order is performed. Within uncertainties, data and theory are in agreement. The sensitivity of the observable to the strong coupling constant $$\alpha _\mathrm {S}$$αS is studied. A fit to all data points with 3-jet masses larger than 664 GeV gives a value of the strong coupling constant of $$\alpha _S(M_\mathrm{Z}) = 0.1171 \pm 0.0013\,\text {(exp)} \,^{+0.0073}_{-0.0047}\,\text {(theo)} $$αS(MZ)=0.1171±0.0013(exp)-0.0047+0.0073(theo).