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Measurements of the tt¯ production cross section in lepton+jets final states in pp collisions at 8 TeV and ratio of 8 to 7 TeV cross sections

Articolo
Data di Pubblicazione:
2017
Abstract:
A measurement of the top quark pair production ( tt⎯⎯tt¯ ) cross section in proton–proton collisions at the centre-of-mass energy of 8 TeVTeV is presented using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.6 fb−1fb−1 . This analysis is performed in the tt⎯⎯tt¯ decay channels with one isolated, high transverse momentum electron or muon and at least four jets, at least one of which is required to be identified as originating from hadronization of a b quark. The calibration of the jet energy scale and the efficiency of b jet identification are determined from data. The measured tt⎯⎯tt¯ cross section is 228.5±3.8(stat)±13.7(syst)±6.0(lumi) pb228.5±3.8(stat)±13.7(syst)±6.0(lumi) pb . This measurement is compared with an analysis of 7 TeVTeV data, corresponding to an integrated luminosity of 5.0 fb−1fb−1 , to determine the ratio of 8 TeVTeV to 7 TeVTeV cross sections, which is found to be 1.43±0.04(stat)±0.07(syst)±0.05(lumi)1.43±0.04(stat)±0.07(syst)±0.05(lumi) . The measurements are in agreement with QCD predictions up to next-to-next-to-leading order.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Engineering (miscellaneous); Physics and Astronomy (miscellaneous)
Elenco autori:
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.; Zeid, S. Abu; Blekman, F.; D’Hondt, J.; Daci, N.; De Bruyn, I.; Deroover, K.; Heracleous, N.; Keaveney, J.; Lowette, S.; Maes, M.; 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.; Reis, T.; Seva, T.; Velde, C. Vander; Vanlaer, P.; Yonamine, R.; Zenoni, F.; Zhang, F.; Beernaert, K.; Benucci, L.; Cimmino, A.; Costantini, S.; Crucy, S.; Dobur, D.; Fagot, A.; Garcia, G.; Gul, M.; Mccartin, J.; Ocampo Rios, A.A.; Poyraz, D.; Ryckbosch, D.; Salva, S.; Sigamani, M.; Strobbe, N.; Tytgat, M.; Van Driessche, W.; Yazgan, E.; Zaganidis, N.; Basegmez, S.; Beluffi, C.; Bondu, O.; Brochet, S.; Bruno, G.; Caudron, A.; Ceard, L.; Da Silveira, G.G.; Delaere, C.; Favart, D.; Forthomme, L.; Giammanco, A.; Hollar, J.; Jafari, A.; Jez, P.; Komm, M.; Lemaitre, V.; Mertens, A.; Musich, M.; Nuttens, C.; Perrini, L.; Pin, A.; Piotrzkowski, K.; Popov, A.; Quertenmont, L.; Selvaggi, M.; Vidal Marono, M.; Beliy, N.; Hammad, G.H.; Aldá Júnior, W.L.; Alves, F.L.; Alves, G.A.; Brito, L.; Correa Martins Junior, M.; Hamer, M.; Hensel, C.; Mora Herrera, C.; Moraes, A.; Pol, M.E.; Rebello Teles, P.; Belchior Batista Das Chagas, E.; Carvalho, W.; Chinellato, J.; Custódio, A.; Da Costa, E.M.; Damiao, D. De Jesus; De Oliveira Martins, C.; De Souza, S. Fonseca; Huertas Guativa, L.M.; Malbouisson, H.; Matos Figueiredo, D.; Mundim, L.; Nogima, H.; Prado Da Silva, W.L.; Santoro, A.; Sznajder, A.; Tonelli Manganote, E.J.; Vilela Pereira, A.; Ahuja, S.; Bernardes, C.A.; De Souza Santos, A.; Dogra, S.; Fernandez Perez Tomei, T.R.; Gregores, E.M.; Mercadante, P.G.; Moon, C.S.; Novaes, S.F.; Padula, Sandra S.; Romero Abad, D.; Ruiz Vargas, J.C.; Aleksandrov, A.; Hadjiiska, R.; Iaydjiev, P.; Rodozov, M.; Stoykova, S.; Sultanov, G.; Vutova, M.; Dimitrov, A.; Glushkov, I.; Litov, L.; Pavlov, B.; Petkov, P.; Ahmad, M.; Bian, J.G.; Chen, G.M.; Chen, H.S.; Chen, M.; Cheng, T.; Du, R.; Jiang, C.H.; Plestina, R.; Romeo, F.; Shaheen, S.M.; Spiezia, A.; Tao, J.; Wang, C.; Wang, Z.; Zhang, H.; Asawatangtrakuldee, C.; Ban, Y.; Li, Q.; Liu, S.; Mao, Y.; Qian, S.J.; Wang, D.; Xu, Z.; Avila, C.; Cabrera, A.; Chaparro Sierra, L.F.; Florez, C.; Gomez, J.P.; Moreno, B. Gomez; Sanabria, J.C.; Godinovic, N.; Lelas, D.; Puljak, I.; Ribeiro Cipriano, P.M.; Antunovic, Z.; Kovac, M.; Brigljevic, V.; Kadija, K.; Luetic, J.; Micanovic, S.; Sudic, L.; Attikis, A.; Mavromanolakis, G.; Mousa, J.; Nicolaou, C.; Ptochos, F.; Razis, P.A.; Rykaczewski, H.; Bodlak, M.; Finger, M.; Finger, M.; Abdelalim, A.A.; Awad, A.; El Sawy, M.; Mahrous, A.; Radi, A.; Calpas, B.; Kadastik, M.; Murumaa, M.; Raidal, M.; Tiko, A.; Veelken, C.; Eerola, P.; Pekkanen, J.; Voutilainen, M.; Härkönen, J.; Karimäki, V.; Kinnunen, R.; Lampén, T.; Lassila-Perini, K.; Lehti, S.; Lindén, T.; Luukka, P.; Mäenpää, T.; Peltola, T.; Tuominen, E.; Tuominiemi, J.; Tuovinen, E.; Wendland, L.; Talvitie, J.; Tuuva, T.; Besancon, M.; Couderc, F.; Dejardin, M.; Denegri, D.; Fabbro, B.; Faure, J.L.; Favaro,
Autori di Ateneo:
AMAPANE Nicola Carlo
ARGIRO' Stefano
BELLAN Riccardo
COSTA Marco
COVARELLI Roberto
MIGLIORE Ernesto
MONACO Vincenzo
OBERTINO Maria Margherita
SACCHI Roberto
SOLA Valentina
SOLANO Ada Maria
Link alla scheda completa:
https://iris.unito.it/handle/2318/1639985
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1639985/338623/art%253A10.1140%252Fepjc%252Fs10052-016-4504-z.pdf
Pubblicato in:
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Journal
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