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Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at s√=13 TeV

Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at s√=13 TeV
Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at s√=13 TeV
A search for narrow vector resonances decaying into quark-antiquark pairs is presented. The analysis is based on data collected in proton-proton collisions at s√=13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb−1. The hypothetical resonance is produced with sufficiently high transverse momentum that its decay products are merged into a single jet with two-prong substructure. A signal would be identified as a peak over a smoothly falling background in the distribution of the invariant mass of the jet, using novel jet substructure techniques. No evidence for such a resonance is observed within the mass range of 50-300 GeV. Upper limits at 95% confidence level are set on the production cross section, and presented in a mass-coupling parameter space. The limits further constrain simplified models of dark matter production involving a mediator interacting between quarks and dark matter particles through a vector or axial-vector current. In the framework of these models, the results are the most sensitive to date, extending for the first time the search region to masses below 100 GeV.
1029-8479
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Belyaev, Alexander , The CMS Collaboration (2018) Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at s√=13 TeV. Journal of High Energy Physics, 2018 (1). (doi:10.1007/JHEP01(2018)097).

Record type: Article

Abstract

A search for narrow vector resonances decaying into quark-antiquark pairs is presented. The analysis is based on data collected in proton-proton collisions at s√=13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb−1. The hypothetical resonance is produced with sufficiently high transverse momentum that its decay products are merged into a single jet with two-prong substructure. A signal would be identified as a peak over a smoothly falling background in the distribution of the invariant mass of the jet, using novel jet substructure techniques. No evidence for such a resonance is observed within the mass range of 50-300 GeV. Upper limits at 95% confidence level are set on the production cross section, and presented in a mass-coupling parameter space. The limits further constrain simplified models of dark matter production involving a mediator interacting between quarks and dark matter particles through a vector or axial-vector current. In the framework of these models, the results are the most sensitive to date, extending for the first time the search region to masses below 100 GeV.

Text JHEP01(2018)097 - Version of Record
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Accepted/In Press date: 9 January 2018
e-pub ahead of print date: 22 January 2018
Published date: January 2018

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Local EPrints ID: 418080
URI: https://eprints.soton.ac.uk/id/eprint/418080
ISSN: 1029-8479
PURE UUID: 9f32ed4e-6ace-49f3-8d08-339be4c25e52
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 22 Feb 2018 17:30
Last modified: 06 Jun 2018 12:38

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Author: Alexander Belyaev ORCID iD

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