Search for low-mass quark-antiquark resonances produced in association with a photon at root s=13 TeV
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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
American Physical Society
2019
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/79433/ http://irep.iium.edu.my/79433/ http://irep.iium.edu.my/79433/ http://irep.iium.edu.my/79433/1/79433_Search%20for%20Low-Mass%20Quark-Antiquark_article.pdf http://irep.iium.edu.my/79433/2/79433_Search%20for%20Low-Mass%20Quark-Antiquark_scopus.pdf http://irep.iium.edu.my/79433/3/79433_Search%20for%20Low-Mass%20Quark-Antiquark_wos.pdf |
| Summary: | 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 |
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