Enhancing the Large Hadron Collider sensitivity to charged and neutral broad resonances of new gauge sectors

Fiaschi, J ORCID: 0000-0003-0860-9569, Giuli, F, Hautmann, F and Moretti, S (2022) Enhancing the Large Hadron Collider sensitivity to charged and neutral broad resonances of new gauge sectors. JOURNAL OF HIGH ENERGY PHYSICS, 02 (2). 179-.

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Official URL: http://dx.doi.org/10.1007/JHEP02(2022)179

Abstract

In scenarios beyond the Standard Model (BSM) characterized by charged ($W^\prime$) or neutral ($Z^\prime$) massive gauge bosons with large width, resonant mass searches are not very effective, so that one has to exploit the tails of the mass distributions measured at the Large Hadron Collider (LHC). In this case, the LHC sensitivity to new physics signals is influenced significantly by systematic uncertainties associated with the Parton Distribution Functions (PDF), particularly in the valence quark sector relevant for the multi-TeV mass region. As a BSM framework featuring such conditions, we consider the 4-Dimensional Composite Higgs Model (4DCHM), in which multiple $W^\prime$ and $Z^\prime$ broad resonances are present, with strongly correlated properties. By using the QCD tool xFitter, we study the implications on $W^\prime$ and $Z^\prime$ searches in Drell-Yan (DY) lepton decay channels that follow from the reduction of PDF uncertainties obtained through combining high-statistics precision measurements of DY lepton-charge and forward-backward asymmetries. We find that the sensitivity to the BSM states is greatly increased with respect to the case of base PDF sets, thereby enabling one to set more stringent limits on (or indeed discover) such new particles, both independently and in correlated searches.

Item Type:	Article
Additional Information:	15 pages, 6 figures
Uncontrolled Keywords:	Phenomenological Models, QCD Phenomenology
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	12 May 2022 11:40
Last Modified:	18 Jan 2023 21:03
DOI:	10.1007/JHEP02(2022)179
Open Access URL:	https://link.springer.com/article/10.1007/JHEP02(2...
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3154654