Search for a heavy bottom-like quark in pp collisions at root s=7 TeV

Search for a heavy bottom-like quark in pp collisions at root s=7 TeV

A search for pair-produced bottom-like quarks in pp collisions at root s = 7 TeV is conducted with the CMS experiment at the LHC. The decay b' -> tW is considered in this search. The b'(b) over bar' tW-(t) over barW(+) process can be identified by the distinctive signature of trile...

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Hauptverfasser: Bergauer, T, Hrubec, J, Maes, M, Van Doninck, W, Pavlov, B, Li, W, Ferri, F, Sabes, D, Jussen, R, Erdmann, M, Flugge, G, Stahl, A, Kasemann, M, Krucker, D, Meyer, AB, Raspereza, A, Thomsen, J, Hackstein, C, Troendle, D, Wagner-Kuhr, J, Papadopoulos, I, Kapusi, A, Mehdiabadi, SP, Pugliese, G, Benvenuti, AC, Giacomelli, P, Piccolo, D, Benaglia, A, Vitulo, P, Lucaroni, A, Santocchia, A, Mila, G, Della Ricca, G, Nam, SK, Kim, JE, Moon, DH, Rhee, HB, Park, C, Park, IC, Ibarguen, HAS, Khan, WA, Gorski, M, Kazana, M, Almeida, N, Bunin, P, Murzin, V, Lokhtin, I, Grishin, V, Kachanov, V, Tyurin, N, Battilana, C, Cerrada, M, Willmott, C, Marco, J, Matorras, F, Kaadze, K, Bortignon, P, Rizzi, A, Schmidt, A, Liu, ZK, Kao, KY, Gokbulut, G, Guler, Y, Kaya, O, Womersley, WJ, Colling, D, Erbacher, R, Sierra, RV, Arisaka, K, Ranieri, R, Tu, Y, Koay, SA, Agostino, L, Atac, M, Wu, W, Gartner, J, Quertenmont, L, Hofman, DJ, Duru, F, Mestvirishvili, A, Yetkin, T, Rappoccio, S, Maravin, Y, Hadley, NJ, Harris, R, Ralph, D, Shipkowski, SP, Boeriu, O, Ruchti, R, Durkin, LS, Olsen, J, Vargas, JER, Barnes, VE, Koybasi, O, Neumeister, N, Miner, DC, Orbaker, D, Gershtein, Y, Weinberger, M, Klukas, J
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Zusammenfassung:A search for pair-produced bottom-like quarks in pp collisions at root s = 7 TeV is conducted with the CMS experiment at the LHC. The decay b' -> tW is considered in this search. The b'(b) over bar' tW-(t) over barW(+) process can be identified by the distinctive signature of trileptons and same-sign dileptons. With a data sample corresponding to an integrated luminosity of 34 pb(-1), no excess above the standard model background predictions is observed and a b' quark with a mass between 255 and 361 GeV/c(2) is excluded at the 95% confidence level. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
ISSN:0370-2693