Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/7719
Title: Search for single production of a vector-like T quark decaying to a Z boson and a top quark in proton–proton collisions at s=13TeV
Authors: CMS Collaboration
Karapınar, Güler
Keywords: Vector-like quarks
CMS experiment
Z bosons
High energy physics
Issue Date: Jun-2018
Publisher: Elsevier
Source: Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J. ...CMS Collaboration (2018). Search for single production of a vector-like T quark decaying to a Z boson and a top quark in proton–proton collisions at √s=13TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 781, 574-600. doi:10.1016/j.physletb.2018.04.036
Abstract: 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.
URI: https://doi.org/10.1016/j.physletb.2018.04.036
https://hdl.handle.net/11147/7719
ISSN: 0370-2693
Appears in Collections:Mathematics / Matematik
Rectorate / Rektörlük
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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