Exotic signals of vectorlike quarks

Dobrescu, Bogdan A.; Yu, Felix

doi:10.1088/1361-6471/aacbfd

Title: Exotic signals of vectorlike quarks

Journal Article · Mon Jun 25 00:00:00 EDT 2018 · Journal of Physics. G, Nuclear and Particle Physics

DOI:https://doi.org/10.1088/1361-6471/aacbfd· OSTI ID:1345626

Dobrescu, Bogdan A. ^[1];

^[2]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Theoretical Physics Dept.
Johannes Gutenberg Univ., Mainz (Germany). PRISMA Cluster of Excellence & Mainz Institute for Theoretical Physics

Vectorlike fermions are an important target for hadron collider searches. We show that the vectorlike quarks may predominantly decay via higher-dimensional operators into a quark plus a couple of other standard model fermions. Pair production of vectorlike quarks of charge 2/3 at the LHC would then lead to a variety of possible final states, including $$t\bar{t}+4\tau $$, $$t\bar{b}\nu +3\tau ,t\bar{t}+4\mu ,t\bar{b}\nu +3\mu $$ or $$t\bar{t}+4b$$. Additional channels ($$b\bar{b}+4\tau $$, $$4t+b\bar{b}$$, $6b$, etc) arise in the case of a vectorlike quark of charge -1/3. In conclusion, if the vectorlike quark decays into three light quarks, then the $3j+3j$ signal is more difficult to observe, and the vectorlike quark mass is almost unconstrained by current searches.

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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)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1345626

Report Number(s):: FERMILAB-PUB-16-558-T; MITP-16-133; arXiv:1612.01909; 1501955

Journal Information:: Journal of Physics. G, Nuclear and Particle Physics, Vol. 45, Issue 8; ISSN 0954-3899

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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