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Title
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Search for resonances in the mass spectrum of muon pairs produced in association with b quark jets in proton-proton collisions at = 8 and 13 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| 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 (|| 2.4) and at least one jet in the forward region (|| > 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. |
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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2018
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP11(2018)161
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Volume/pages
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11
(2018)
, 37 p.
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Article Reference
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161
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ISI
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000453290200001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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