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Search for low-mass resonances decaying into two jets and produced in association with a photon or a jet at $\sqrt{s}$ = 13 TeV with the ATLAS detector
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Search for low-mass resonances decaying into two jets and produced in association with a photon or a jet at $\sqrt{s}$ = 13 TeV with the ATLAS detector

Georges Aad, Erlend Aakvaag, Braden Keim Abbott, Kira Abeling, Nils Julius Abicht, Haider Abidi, Mohammed Aboelela, Asmaa Aboulhorma, Halina Abramowicz, Henso Abreu, …
Deutsches Elektronen-Synchrotron, DESY, Hamburg
2024
DOI: https://doi.org/10.3204/pubdb-2024-05972

摘要

benchmark bottom: particle identification CERN LHC Coll channel cross section: upper limit current: constraint dijet: mass spectrum experimental results GeV-cms initial state jet: associated production jet: bottom jet: flavor mass: lower limit new particle new physics: search for p p: colliding beams p p: scattering photon: associated production photon: transverse momentum radiation: initial-state interaction resonance: hadronic decay resonance: mass resonance: production transverse momentum: high
A search is performed for localized excesses in the low-mass dijet invariant mass distribution, targeting a hypothetical new particle decaying into two jets and produced in association with either a high transverse momentum photon or a jet. The search uses the full Run 2 data sample from LHC proton-proton collisions collected by the ATLAS experiment at a center-of-mass energy of 13 TeV during 2015–2018. Two variants of the search are presented for each type of initial-state radiation: one that makes no jet flavor requirements and one that requires both of the jets to have been identified as containing b-hadrons. No excess is observed relative to the Standard Model prediction, and the data are used to set upper limits on the production cross section for a benchmark Z′ model and, separately, for generic, beyond the Standard Model scenarios which might produce a Gaussian-shaped contribution to dijet invariant mass distributions. The results extend the current constraints on dijet resonances to the mass range between 200 and 650 GeV.

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