Exotic decays of heavy B quarks

A bstract Heavy vector-like quarks of charge −1/3, B , have been searched for at the LHC through the decays B → bZ , bh , tW . In models where the B quark also carries charge under a new gauge group, new decay channels may dominate. We focus on the case where the B is charged under a U(1)′ and descr...

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Bibliographic Details
Published in:The journal of high energy physics 2016-01, Vol.2016 (1), p.1-27, Article 38
Main Authors: Fox, Patrick J., Tucker-Smith, David
Format: Article
Language:English
Subjects:
Astronomical models
beyond standard model
Channels
Charge
Classical and Quantum Gravitation
Decay
Elementary Particles
Inclusions
Large Hadron Collider
Physics
Physics and Astronomy
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
rare decays
Regular Article - Theoretical Physics
Relativity Theory
Searching
String Theory
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Summary:A bstract Heavy vector-like quarks of charge −1/3, B , have been searched for at the LHC through the decays B → bZ , bh , tW . In models where the B quark also carries charge under a new gauge group, new decay channels may dominate. We focus on the case where the B is charged under a U(1)′ and describe simple models where the dominant decay mode is B → b Z ′ → b b b ¯ . With the inclusion of dark matter such models can explain the excess of gamma rays from the Galactic center. We develop a search strategy for this decay chain and estimate that with integrated luminosity of 300 fb −1 the LHC will have the potential to discover both the B and the Z ′ for B quarks with mass below ∼ 1.6 TeV, for a broad range of Z ′ masses. A high-luminosity run can extend this reach to 2 TeV.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP01(2016)038