Search for narrow resonances in the b-tagged dijet mass spectrum in proton-proton collisions at √s = 13 TeV
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Date
2023-07-01
Publication Type
Journal Article
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Abstract
A search is performed for narrow resonances decaying to final states of two jets, with at least one jet originating from a b quark, in proton-proton collisions at √s = 13 TeV. The data set corresponds to an integrated luminosity of 138 fb⁻¹ collected with the CMS detector at the LHC. Jets originating from energetic b hadrons are identified through a b-tagging algorithm that utilizes a deep neural network or the presence of a muon inside a jet. The invariant mass spectrum of jet pairs is well described by a smooth parametrization and no evidence for the production of new particles is observed. Upper limits on the production cross section are set for excited b quarks and other resonances decaying to dijet final states containing b quarks. These limits exclude at 95% confidence level models of Z′ bosons with masses from 1.8 TeV to 2.4 TeV and of excited b quarks with masses from 1.8 TeV to 4.0 TeV. This is the most stringent exclusion of excited b quarks to date.
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published
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Journal / series
Volume
108 (1)
Pages / Article No.
12009
Publisher
American Physical Society
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Subject
Quark & gluon jets; Bottom quark; Hypothetical gauge bosons; Hadron colliders
Organisational unit
03904 - Wallny, Rainer / Wallny, Rainer
03593 - Dissertori, Günther / Dissertori, Günther
09720 - de Cosa, Annapaola / de Cosa, Annapaola
Notes
Funding
758316 - Majorana neutrino discovery strategy with CMS (EC)