Bibcode
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.; König, A.; Krätschmer, I.; Liko, D.; Matsushita, T.; Mikulec, I.; Rabady, D.; Rad, N.; Rahbaran, B.; Rohringer, H.; Schieck, J.; Strauss, J.; Waltenberger, W.; Wulz, C.-E.; Dvornikov, O.; Makarenko, V.; Mossolov, V.; Suarez Gonzalez, J.; Zykunov, V.; Shumeiko, N.; Alderweireldt, S.; De Wolf, E. A.; Janssen, X.; Lauwers, J.; 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.; Lowette, S.; Moortgat, S.; Moreels, L.; Olbrechts, A.; Python, Q.; Skovpen, K.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Brun, H.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Léonard, A.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-conde, A.; Seva, T.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cornelis, T.; Dobur, D.; Fagot, A.; Gul, M.; Khvastunov, I.; Poyraz, D.; Salva, S.; Schöfbeck, R.; Tytgat, M.; Van Driessche, W.; Yazgan, E.; Zaganidis, N.; Bakhshiansohi, H.; Bondu, O.; Brochet, S.; Bruno, G.; Caudron, A. et al.
Bibliographical reference
The European Physical Journal C, Volume 77, Issue 7, article id.459, 45 pp.
Advertised on:
7
2017
Citations
25
Refereed citations
19
Description
Normalized double-differential cross sections for top quark pair
(t\overline{t}) production are measured in pp collisions at a
centre-of-mass energy of 8 {TeV} with the CMS experiment at the LHC. The
analyzed data correspond to an integrated luminosity of 19.7 {fb}^{-1}.
The measurement is performed in the dilepton e^{± }μ
^{∓ } final state. The t\overline{t} cross section is determined
as a function of various pairs of observables characterizing the
kinematics of the top quark and t\overline{t} system. The data are
compared to calculations using perturbative quantum chromodynamics at
next-to-leading and approximate next-to-next-to-leading orders. They are
also compared to predictions of Monte Carlo event generators that
complement fixed-order computations with parton showers, hadronization,
and multiple-parton interactions. Overall agreement is observed with the
predictions, which is improved when the latest global sets of proton
parton distribution functions are used. The inclusion of the measured
t\overline{t} cross sections in a fit of parametrized parton
distribution functions is shown to have significant impact on the gluon
distribution.