Search For Single Production Of A Vector-Like T Quark Decaying To A Z Boson And A Top Quark İn Proton–Proton Collisions At ?S=13tev

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Küçük Resim

Tarih

2018

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Elsevier

Erişim Hakkı

Özet

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 13TeVin 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 0.26–0.04pbfor T quark masses in the range 0.7–1.7TeV, assuming a negligible width. Asimilar 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 0.06pbfor Z boson masses in the range from 1.5 to 2.5TeV

Açıklama

Anahtar Kelimeler

CMS, Physics, Vector-like quarks

Kaynak

WoS Q Değeri

Q2

Scopus Q Değeri

Q1

Cilt

Sayı

Künye

Physics Letters B 781 (2018) 574–600