Bibcode
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Grossmann, J.; Hrubec, J.; Jeitler, M.; König, A.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; Pree, E.; Rabady, D.; Rad, N.; Rohringer, H.; Schieck, J.; Schöfbeck, R.; Spanring, M.; Spitzbart, D.; Waltenberger, W.; Wittmann, J.; Wulz, C.-E.; Zarucki, M.; Chekhovsky, V.; Mossolov, V.; Suarez Gonzalez, J.; De Wolf, E. A.; Di Croce, D.; Janssen, X.; Lauwers, J.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; De Bruyn, I.; De Clercq, J.; Deroover, K.; Flouris, G.; Lontkovskyi, D.; Lowette, S.; Moortgat, S.; Moreels, L.; Python, Q.; Skovpen, K.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Brun, H.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-conde, A.; Seva, T.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Gul, M.; Khvastunov, I.; Poyraz, D.; Roskas, C.; Salva, S.; Tytgat, M.; Verbeke, W.; Zaganidis, N.; Bakhshiansohi, H.; Bondu, O.; Brochet, S.; Bruno, G.; Caudron, A. et al.
Bibliographical reference
Physics Letters B, Volume 781, p. 574-600.
Advertised on:
6
2018
Citations
69
Refereed citations
52
Description
A search is presented for single production of a vector-like quark (T)
decaying to a Z boson and a top quark, with the Z boson decaying
leptonically and the top quark decaying hadronically. The search uses
data collected by the CMS experiment in proton-proton collisions at a
center-of-mass energy of 13 TeV in 2016, corresponding to an integrated
luminosity of 35.9fb-1. The presence of forward jets is a
particular characteristic of single production of vector-like quarks
that is used in the analysis. For the first time, different T quark
width hypotheses are studied, from negligibly small to 30% of the new
particle mass. At the 95% confidence level, the product of cross section
and branching fraction is excluded above values in the range 0.26-0.04
pb for T quark masses in the range 0.7-1.7 TeV, assuming a negligible
width. A similar sensitivity is observed for widths of up to 30% of the
T quark mass. The production of a heavy Z‧ boson
decaying to Tt, with T → tZ, is also searched for, and limits on
the product of cross section and branching fractions for this process
are set between 0.13 and 0.06 pb for Z‧ boson masses in
the range from 1.5 to 2.5 TeV.