Inclusive search for a vector-like T quark with charge $\frac{2}{3}$ in pp collisions at $\sqrt{s}$ = 8 TeV

Chatrchyan, Serguei

doi:10.1016/j.physletb.2014.01.006

Title: Inclusive search for a vector-like T quark with charge $$\frac{2}{3}$$ in pp collisions at $$\sqrt{s}$$ = 8 TeV

Journal Article · Wed Jan 08 00:00:00 EST 2014 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2014.01.006· OSTI ID:1151697

Chatrchyan, Serguei ^[1]

Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.

A search is performed for a massive new vector-like quark T, with charge 2/3, that is pair produced together with its antiparticle in proton-proton collisions. The data were collected by the CMS experiment at the Large Hadron Collider in 2012 at sqrt(s) = 8 TeV and correspond to an integrated luminosity of 19.5 inverse femtobarns. The T quark is assumed to decay into three different final states, bW, tZ, and tH. The search is carried out using events with at least one isolated lepton. No deviations from standard model expectations are observed, and lower limits are set on the T quark mass at 95% confidence level. The lower limit lies between 687 and 782 GeV for all possible values of the branching fractions into the three different final states assuming strong production. These limits are the most stringent constraints to date on the existence of such a quark.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: CMS Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1151697

Report Number(s):: FERMILAB-PUB-13-617-CMS; arXiv eprint number arXiv:1311.7667; TRN: US1601002

Journal Information:: Physics Letters B, Vol. 729, Issue C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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