Search for Top-Quark Partners with Charge 5/3 in the Same-Sign Dilepton Final State
Articles > Article · 2014
Authors: S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Eroe, C. Fabjan, M. Friedl, R. Fruehwirth, V. M. Ghete, C. Hartl, N. Hoermann, J. Hrubec, M. Jeitler, W. Kiesenhofer, V. Knuenz, M. Krammer, I. Kraetschmer, D. Liko, I. Mikulec, D. Rabady, B. Rahbaran, H. Rohringer, R. Schoefbeck, J. Strauss, A. Taurok, W. Treberer-Treberspurg, W. Waltenberger, C. -E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, S. Alderweireldt, M. Bansal, S. Bansal, T. Cornelis, E. A. De Wolf, X. Janssen, A. Knutsson, S. Luyckx, L. Mucibello, S. Ochesanu, B. Roland, R. Rougny, H. Van Haevermaet, P. Van Mechelen, N. Van Remortel, A. Van Spilbeeck, F. Blekman, S. Blyweert, J. D'Hondt, N. Heracleous, A. Kalogeropoulos, J. Keaveney, T. J. Kim, S. Lowette, M. Maes, A. Olbrechts, D. Strom, S. Tavernier, W. Van Doninck, P. Van Mulders, G. P. Van Onsem, I. Villella, C. Caillol, B. Clerbaux, G. De Lentdecker, L. Favart, A. P. R. Gay, T. Hreus, A. Leonard, P. E. Marage, A. Mohammadi, L. Pernie, T. Reis, T. Seva, L. Thomas, C. Vander Velde, P. Vanlaer, J. Wang, V. Adler, K. Beernaert, L. Benucci, A. Cimmino, S. Costantini, S. Dildick, G. Garcia, B. Klein, J. Lellouch, J. Mccartin, A. A. Ocampo Rios, D. Ryckbosch, M. Sigamani, N. Strobbe, F. Thyssen, M. Tytgat, S. Walsh, E. Yazgan, G. A. Alves, V. Genchev, J. G. Bian, C. Avila, N. Godinovic, A. Attikis, M. Finger, A. A. Abdelalim, M. Kadastik, P. Eerola, M. Besancon, Z. Tsamalaidze, C. Autermann, J. Lingemann, G. Anagnostou, I. Evangelou, S. K. Swain, S. B. Beri, H. Arfaei, M. Grunewald, M. Abbrescia, S. Chang, H. Castilla-Valdez, D. Krofcheck, H. Bialkowska, P. Bargassa, S. Afanasiev, C. Albajar, M. Cardaci, B. Asavapibhop, Nasuf SÖNMEZ, L. Levchuk, J. J. Brooke, J. Dittmann
PHYSICAL REVIEW LETTERS, Journal Indexed in SCI Expanded, International, 2014, vol 112
DOI: 10.1103/physrevlett.112.171801
Summary
A search for the production of heavy partners of the top quark with charge 5/3 is performed in events with a pair of same-sign leptons. The data sample corresponds to an integrated luminosity of 19.5 fb(-1) and was collected at root s = 8 TeV by the CMS experiment. No significant excess is observed in the data above the expected background, and the existence of top-quark partners with masses below 800 GeV is excluded at a 95% confidence level, assuming they decay exclusively to tW. This is the first limit on these particles from the LHC, and it is significantly more restrictive than previous limits.