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  • Measurement of the mass dif...
    Aad, G.; Albrand, S.; Brown, J.; Buat, Q.; Clement, B.; Collot, J.; Crépé-Renaudin, S.; Dechenaux, B.; Delemontex, T.; Delsart, P.A.; Gabaldon, C.; Genest, M.H.; Hostachy, J.Y.; Laisne, E.; Le, B.T.; Ledroit-Guillon, F.; Lleres, A.; Lucotte, A.; Malek, F.; Monini, C.; Stark, J.; Sun, X.; Trocmé, B.; Weydert, C.; Rahal, G.; Boumediene, D.; Busato, Emmanuel; Calvet, D.; Calvet, S.; Donini, J.; Dubreuil, E.; Ghodbane, N.; Gris, Ph; Guicheney, C.; Liao, H.; Pallin, D.; Paredes Hernández, Daniela; Podlyski, F.; Santoni, C.; Theveneaux-Pelzer, Timothée; Valery, Loïc; Vazeille, F.; Abdel Khalek, S.; Augé, E.; Bassalat, A.; Binet, S.; Bourdarios, C.; de La Taille, C.; de Vivie de Regie, J.B.; Duflot, L.; Escalier, M.; Fayard, L.; Fournier, D.; Grivaz, J.-F.; Guillemin, T.; Henrot-Versillé, S.; Hrivnac, J.; Iconomidou-Fayard, L.; Idarraga, J.; Kado, M.; Lorenzo Martinez, N.; Lounis, A.; Makovec, N.; Poggioli, L.; Puzo, P.; Renaud, A.; Rousseau, D.; Rybkin, G.; Sauvan, J.B.; Schaarschmidt, J.; Schaffer, A.C.; Scifo, E.; Serin, L.; Simion, S.; Tanaka, R.; Tran, H.L.; Zerwas, D.; Zhang, Zhiqing; Berger, N.; Delmastro, M.; Di Ciaccio, L.; Doan, T.K.O.; Elles, S.; Goy, C.; Hryn'Ova, T.; Jézéquel, S.; Keoshkerian, H.; Lafaye, R.; Leveque, J.; Lombardo, V.P.; Massol, N.; Petit, E.; Przysiezniak, H.; Sauvage, G.; Sauvan, E.; Schwoerer, M.; Todorov, T.; Wingerter-Seez, I.; Zitoun, R.; Alio, L.

    Physics letters. B, 2014, Letnik: 728
    Journal Article

    A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb-1 data sample of proton--proton collisions at sqrt(s) = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with ttbar production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields mt-mtbar = 0.67 +/- 0.61 (stat) +/- 0.41 (syst) GeV, consistent with CPT invariance.