Search for pair production of vector-like quarks in the bWb‾W channel from proton–proton collisions at s=13TeV

• Published in: Physics letters. B Vol. 779; pp. 82 - 106
• Main Authors: Luetic, J., Melo De Almeida, M., Qian, S.J., Florez, C., Tuuva, T., Faure, J.L., Jarry, P., Baffioni, S., El Mamouni, H., Feld, L., Grados Luyando, J.M., Grohsjean, A., Hinzmann, A., Lapsien, T., Marconi, D., Stöver, M., Colombo, F., Dierlamm, A., Beni, N., Bahinipati, S., Mandal, K., Choudhary, B.C., Behera, P.K., Chatterjee, S., Dube, S., Sharma, S., Selvaggi, G., Tuve, C., Russo, L., Fabbri, F., Piccolo, D., Tosi, S., Benato, L., Magnani, A., Mantovani, G., Spiga, D., Biino, C., Monaco, V., Sola, V., Nam, K., Yang, U.K., Kazana, M., Konecki, M., Hollar, J., Gavrilenko, M., Palichik, V., Dremin, I., Ryutin, R., Fernández Ramos, J.P., Quintario Olmeda, A., Lopez Virto, A., Gulhan, D., Lourenço, C., Mulders, M., Orfanelli, S., Pierini, M., Selvaggi, M., Veckalns, V., Shchutska, L., Chao, Y., Tsai, J.f., Zorbakir, I.S., Beck, L., Casasso, S., Hall, G., Iles, G., Rumerio, P., Pellett, D., Burt, K., Ghiasi Shirazi, S.M.A., Krutelyov, V., Padhi, S., George, C., Richman, J., Sun, M., Berryhill, J., Strait, J., Adams, M.R., Betts, R.R., Chen, X., Evdokimov, O., Gandrajula, R.P., Khristenko, V., Penzo, A., Sarica, U., Toda, S., Abercrombie, D., Levin, A., Nourbakhsh, S., Gonzalez Suarez, R., Parker, A., Odell, N., Ruchti, R., Han, J., De Mattia, M., Eusebi, R., Ni, H., Cox, B., Karchin, P.E., Pierro, G.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 10-04-2018; Elsevier
• Subjects: CMS; Physics; Vector-like quarks; CMS; Vector-like quarks; Physics
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2018.01.077

A search is presented for the production of vector-like quark pairs, TT‾ or YY‾, with electric charge of 2/3 (T) or −4/3 (Y), in proton–proton collisions at s=13TeV. The data were collected by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.8fb−1. The T and Y quarks are assumed to decay exclusively to a W boson and a b quark. The search is based on events with a single isolated electron or muon, large missing transverse momentum, and at least four jets with large transverse momenta. In the search, a kinematic reconstruction of the final state observables is performed, which would permit a signal to be detected as a narrow mass peak (≈7% resolution). The observed number of events is consistent with the standard model prediction. Assuming strong pair production of the vector-like quarks and a 100% branching fraction to bW, a lower limit of 1295 GeV at 95% confidence level is set on the T and Y quark masses.