Search for low-mass quark-antiquark resonances produced in association with a photon at √ s = 13 TeV
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Type :
Article
Publication Status :
Published
Access :
openAccess
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.
Source :
Physical Review Letters
Date :
2019-12-03
Volume :
123
Issue :
23
Publisher :
American Physical Society
URI
http://hdl.handle.net/10679/6618https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.231803
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