Single production of vector-like quarks: the effects of large width, interference and NLO corrections

Journal of High Energy Physics

Thomas Flacke¹  Luca Panizzi²  Hua-Sheng Shao³  Benjamin Fuks³  Aldo Deandrea⁴ 

[1] Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS);Department of Physics and Astronomy, Uppsala University;Laboratoire de Physique Théorique et Hautes Energies (LPTHE), UMR 7589, Sorbonne Université et CNRS;Univ. Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3, IP2I UMR5822;

关键词: vector-like quarks;    Hadron-Hadron scattering (experiments);    Beyond Standard Model;    Exotics;   

DOI  :  10.1007/JHEP08(2021)107

来源: DOAJ

【 摘 要 】

Abstract We provide a comprehensive discussion, together with a complete setup for simulations, relevant for the production of a single vector-like quark at hadron colliders. Our predictions include finite width effects, signal-background interference effects and next-to-leading order QCD corrections. We explicitly apply the framework to study the single production of a vector-like quark T with charge 2/3, but the same procedure can be used to analyse the single production of vector-like quarks with charge −4/3, −1/3, 2/3 and 5/3, when the vector-like quark interacts with the Standard Model quarks and electroweak bosons. Moreover, this procedure can be straightforwardly extended to include additional interactions with exotic particles. We provide quantitative results for representative benchmark scenarios characterised by the T mass and width, and we determine the role of the interference terms for a range of masses and widths of phenomenological significance. We additionally describe in detail, both analytically and numerically, a striking feature in the invariant mass distribution appearing only in the T → th channel.

【 授权许可】

Unknown