Search for third-generation scalar leptoquarks in the t[tau] channel in proton-proton collisions at ... TeV

• Published in: The journal of high energy physics 2015-07, Vol.2015 (7), p.1
• Main Authors: Wulz, C-e, Belchior Batista Das Chagas, E, De Oliveira Martins, C, Mercadante, P G, Novaes, S F, Zhang, F, Mousa, J, Luukka, P, Tuominiemi, J, Van Hove, P, Ille, B, Meyer, A, Geenen, H, Pooth, O, Saxena, P, Kogler, R, Peiffer, T, De Boer, W, Hartmann, F, Simonis, H J, Hazi, A, Palinkas, J, Kumar, Ashok, Bhardwaj, A, Mukherjee, S, Dewanjee, R K, Sharma, S, Montanari, A, Paoletti, S, Merola, M, Bagliesi, G, Dell'orso, R, Del Re, D, Traczyk, P, Arneodo, M, Cartiglia, N, Costa, M, Degano, A, Kiani, B, Hong, B, Kwon, E, Salazar Ibarguen, H A, Krofcheck, D, Shulha, S, Baskakov, A, Auffray, E, Gigi, D, Guida, R, Pape, L, Tsirou, A, Bertl, W, Rohe, T, Pandolfi, F, Canelli, M F, Sorokin, P, Clement, E, Bainbridge, R, Dauncey, P, Kenzie, M, Nash, J, Cole, J E, Breedon, R, Gardner, M, Stolp, D, Ellison, J, Holzner, A, Johnson, A, Dittmer, S, Thom, J, Wittich, P, Green, D, Lammel, S, Yang, F, Shchutska, L, Snowball, M, Martinez, G, Diamond, B, Mermerkaya, H, Yi, K, Skuja, A, Wyslouch, B, Kharchilava, A, Barberis, E, Pearson, T, Koay, S A, Stickland, D, Silvers, D, Arora, S, Gershtein, Y, Kaplan, S, Somalwar, S, Thomassen, P, Delgado, A, Osipenkov, I, Faulkner, J, Delannoy, A G, Gurrola, A, Sheldon, P, Friis, E, Taylor, D
• Format: Article
• Language: English
• Subjects: High energy physics
• ISSN: 1029-8479
• DOI: 10.1007/JHEP07(2015)042

Abstract A search for pair production of third-generation scalar leptoquarks decaying to top quark and [tau] lepton pairs is presented using proton-proton collision data at a center-of-mass energy of ... TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb -1. The search is performed using events that contain an electron or a muon, a hadronically decaying [tau] lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a [tau] lepton, the existence of pair produced, charge -1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a [tau] lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling [lambda] 333 ' . [Figure not available: see fulltext.]