PoS - Proceedings of Science
Volume 297 - XXV International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2017) - WG3 Higgs and BSM Physics in Hadron Collisions
Production of Extra Quarks decaying to Dark Matter beyond the Narrow Width Approximation at the LHC
H. Prager*, S. Moretti, D. O'Brien and L. Panizzi
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Pre-published on: September 12, 2017
Published on: January 16, 2018
Abstract
This paper explores the effects of finite width in processes of pair production of a heavy eXtra Quark (XQ) with charge 2/3 and its subsequent decay into a Dark Matter (DM) candidate -- either scalar or vector -- and Standard Model (SM) up-type quarks at the Large Hadron Collider (LHC). This dynamics has been ignored so far in standard experimental searches of heavy quarks decaying to DM and we assess herein the regions of validity of current approaches, based on the assumption that the XQ has a narrow width. Further, we discuss the configurations of masses, widths and couplings where the latter breaks down.
DOI: https://doi.org/10.22323/1.297.0300
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