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Search for Low-Mass Quark-Antiquark Resonances Produced in Association with a Photon at s=13 TeV

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2019
PhysRevLett.123.231803.pdf (443.2Kb)
Authors
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Bergauer, T.
Adžić, Petar
Ćirković, Predrag
Devetak, Damir
Đorđević, Miloš
Milenović, Predrag
Milošević, Jovan
Stojanović, Milan
Contributors
CMS Collaboration
CMS Collaboration (ukupan broj autora: 2337)
Article (Published version)
,
© 2019 CERN. for the CMS Collaboration
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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 colli...der.

Source:
Physical Review Letters, 2019, 123

DOI: 10.1103/PhysRevLett.123.231803

ISSN: 0031-9007

PubMed: 31868480

WoS: 000500732100009

Scopus: 2-s2.0-85076638339
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http://vinar.vin.bg.ac.rs/handle/123456789/8763
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