Search for direct production of GeV-scale resonances decaying to a pair of muons in proton-proton collisions at s = 13 TeV
Journal
Journal of High Energy Physics
Journal Volume
2023
Journal Issue
12
Start Page
70
ISSN
1029-8479
Date Issued
2023-12-12
Author(s)
Hayrapetyan A.
Abstract
Abstract A search for direct production of low-mass dimuon resonances is performed using $$ \sqrt{s} $$ s = 13 TeV proton-proton collision data collected by the CMS experiment during the 2017�V2018 operation of the CERN LHC with an integrated luminosity of 96.6 fb?1. The search exploits a dedicated high-rate trigger stream that records events with two muons with transverse momenta as low as 3 GeV but does not include the full event information. The search is performed by looking for narrow peaks in the dimuon mass spectrum in the ranges of 1.1�V2.6 GeV and 4.2�V7.9 GeV. No significant excess of events above the expectation from the standard model background is observed. Model-independent limits on production rates of dimuon resonances within the experimental fiducial acceptance are set. Competitive or world��s best limits are set at 90% confidence level for a minimal dark photon model and for a scenario with two Higgs doublets and an extra complex scalar singlet (2HDM+S). Values of the squared kinetic mixing coefficient �`2 in the dark photon model above 10?6 are excluded over most of the mass range of the search. In the 2HDM+S, values of the mixing angle sin(�cH) above 0.08 are excluded over most of the mass range of the search with a fixed ratio of the Higgs doublets vacuum expectation tan �] = 0.5.
Subjects
Beyond Standard Model
Hadron-Hadron Scattering
Publisher
Springer Science and Business Media LLC
Type
journal article