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Title: Search for resonances in the mass spectrum of muon pairs produced in association with b quark jets in proton-proton collisions at $$\sqrt{s} =$$ 8 and 13 TeV

Abstract

A search for resonances in the mass range 12-70 GeV produced in association with a b quark jet and a second jet, and decaying to a muon pair, is reported. The analysis is based on data from proton-proton collisions at center-of-mass energies of 8 and 13 TeV, collected with the CMS detector at the LHC and corresponding to integrated luminosities of 19.7 and 35.9 fb$$^{-1}$$, respectively. The search is carried out in two mutually exclusive event categories. Events in the first category are required to have a b quark jet in the central region ($$|\eta|\le$$ 2.4) and at least one jet in the forward region ($$|\eta|>$$2.4). Events in the second category are required to have two jets in the central region, at least one of which is identified as a b quark jet, no jets in the forward region, and low missing transverse momentum. An excess of events above the background near a dimuon mass of 28 GeV is observed in the 8 TeV data, corresponding to local significances of 4.2 and 2.9 standard deviations for the first and second event categories, respectively. A similar analysis conducted with the 13 TeV data results in a mild excess over the background in the first event category corresponding to a local significance of 2.0 standard deviations, while the second category results in a 1.4 standard deviation deficit. The fiducial cross section measurements and 95% confidence level upper limits on those for a resonance consistent with the 8 TeV excess are provided at both collision energies.

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS
OSTI Identifier:
1467046
Report Number(s):
FERMILAB-PUB-18-407-CMS; arXiv:1808.01890; CMS-HIG-16-017; CERN-EP-2018-204
1685201
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
JHEP
Additional Journal Information:
Journal Name: JHEP
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Sirunyan, Albert M, and et al. Search for resonances in the mass spectrum of muon pairs produced in association with b quark jets in proton-proton collisions at $\sqrt{s} =$ 8 and 13 TeV. United States: N. p., 2018. Web.
Sirunyan, Albert M, & et al. Search for resonances in the mass spectrum of muon pairs produced in association with b quark jets in proton-proton collisions at $\sqrt{s} =$ 8 and 13 TeV. United States.
Sirunyan, Albert M, and et al. Mon . "Search for resonances in the mass spectrum of muon pairs produced in association with b quark jets in proton-proton collisions at $\sqrt{s} =$ 8 and 13 TeV". United States. https://www.osti.gov/servlets/purl/1467046.
@article{osti_1467046,
title = {Search for resonances in the mass spectrum of muon pairs produced in association with b quark jets in proton-proton collisions at $\sqrt{s} =$ 8 and 13 TeV},
author = {Sirunyan, Albert M and et al.},
abstractNote = {A search for resonances in the mass range 12-70 GeV produced in association with a b quark jet and a second jet, and decaying to a muon pair, is reported. The analysis is based on data from proton-proton collisions at center-of-mass energies of 8 and 13 TeV, collected with the CMS detector at the LHC and corresponding to integrated luminosities of 19.7 and 35.9 fb$^{-1}$, respectively. The search is carried out in two mutually exclusive event categories. Events in the first category are required to have a b quark jet in the central region ($|\eta|\le$ 2.4) and at least one jet in the forward region ($|\eta|>$2.4). Events in the second category are required to have two jets in the central region, at least one of which is identified as a b quark jet, no jets in the forward region, and low missing transverse momentum. An excess of events above the background near a dimuon mass of 28 GeV is observed in the 8 TeV data, corresponding to local significances of 4.2 and 2.9 standard deviations for the first and second event categories, respectively. A similar analysis conducted with the 13 TeV data results in a mild excess over the background in the first event category corresponding to a local significance of 2.0 standard deviations, while the second category results in a 1.4 standard deviation deficit. The fiducial cross section measurements and 95% confidence level upper limits on those for a resonance consistent with the 8 TeV excess are provided at both collision energies.},
doi = {},
journal = {JHEP},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}