Search for low-mass quark-antiquark resonances produced in association with a photon at root s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Bergauer, Thomas and Md. Ali, Mohd. Adli (2019) Search for low-mass quark-antiquark resonances produced in association with a photon at root s=13 TeV. Physical Review Letters, 123 (23). pp. 1-17. ISSN 0031-9007 E-ISSN 1079-7114

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Abstract

A search for narrow low-mass resonances decaying to quark-antiquark pairs is presented. The search is based on proton-proton collision events collected at 13 TeV by the CMS detector at the CERN LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1, recorded in 2016. The search considers the case where the resonance has high transverse momentum due to initial-state radiation of a hard photon. To study this process, the decay products of the resonance are reconstructed as a single large-radius jet with two-pronged substructure. The signal would be identified as a localized excess in the jet invariant mass spectrum. No evidence for such a resonance is observed in the mass range 10 to 125 GeV. Upper limits at the 95% confidence level are set on the coupling strength of resonances decaying to quark pairs. The results obtained with this photon trigger strategy provide the first direct constraints on quark-antiquark resonance masses below 50 GeV obtained at a hadron collider

Item Type:	Article (Journal)
Additional Information:	7861/79433
Uncontrolled Keywords:	Low-Mass Quark-Antiquark Resonances; ffiffi s p = 13 TeV
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	05 Mar 2020 15:36
Last Modified:	05 Mar 2020 15:36
URI:	http://irep.iium.edu.my/id/eprint/79433

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