Exotic signals of vectorlike quarks. (25th June 2018)

• Record Type: Journal Article
• Authors: Dobrescu, Bogdan A; Yu, Felix
• Is Part Of: Journal of physics. Volume 45:Number 8(2018:Aug.)
• Publication Date: 2018-06-25
• Subjects: vectorlike quarks -- LHC phenomenology -- collider physics; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/aacbfd
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: 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 t ̄ + 4 τ, t b ̄ ν + 3 τ, t t ̄ + 4 μ, t b ̄ ν + 3 μ or t t ̄ + 4 b . Additional channels ( b b ̄ + 4 τ, 4 t + b b ̄, 6 b, etc) arise in the case of a vectorlike quark of charge −1/3. If the vectorlike quark decays into three light quarks, then the 3 j + 3 j signal is more difficult to observe, and the vectorlike quark mass is almost unconstrained by current searches.