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Search for narrow resonances in dilepton mass spectra in proton–proton collisions at √s=13TeV and combination with 8 TeV data

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dc.contributor.author CMS Collaboration en_US
dc.contributor.author Khachatryan, V. en_US
dc.contributor.author CHAUHAN, S. en_US
dc.contributor.author DUBE, SOURABH en_US
dc.contributor.author HEGDE, V. en_US
dc.contributor.author KAPOOR, A. en_US
dc.contributor.author KOTHEKAR, K. en_US
dc.contributor.author RANE, A. en_US
dc.contributor.author SHARMA, SEEMA et al. en_US
dc.date.accessioned 2019-07-01T05:39:39Z
dc.date.available 2019-07-01T05:39:39Z
dc.date.issued 2017-05 en_US
dc.identifier.citation Physics Letters B, 768, 57-80. en_US
dc.identifier.issn 0370-2693 en_US
dc.identifier.issn 1873-2445 en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3416
dc.identifier.uri https://doi.org/10.1016/j.physletb.2017.02.010 en_US
dc.description.abstract A search for narrow resonances in dielectron and dimuon invariant mass spectra has been performed using data obtained from proton–proton collisions at √s=13TeV collected with the CMS detector. The integrated luminosity for the dielectron sample is 2.7 fb−1 and for the dimuon sample 2.9 fb−1. The sensitivity of the search is increased by combining these data with a previously analyzed set of data obtained at √s=8TeV and corresponding to a luminosity of 20 fb−1. No evidence for non-standard-model physics is found, either in the 13 TeV data set alone, or in the combined data set. Upper limits on the product of production cross section and branching fraction have also been calculated in a model-independent manner to enable interpretation in models predicting a narrow dielectron or dimuon resonance structure. Limits are set on the masses of hypothetical particles that could appear in new-physics scenarios. For the Z′SSM particle, which arises in the sequential standard model, and for the superstring inspired Z′? particle, 95% confidence level lower mass limits for the combined data sets and combined channels are found to be 3.37 and 2.82 TeV, respectively. The corresponding limits for the lightest Kaluza–Klein graviton arising in the Randall–Sundrum model of extra dimensions with coupling parameters 0.01 and 0.10 are 1.46 and 3.11 TeV, respectively. These results significantly exceed the limits based on the 8 TeV LHC data. en_US
dc.language.iso en en_US
dc.publisher Elsevier B.V. en_US
dc.subject CMS en_US
dc.subject Dileptons en_US
dc.subject Narrow resonances en_US
dc.subject Extra dimensions en_US
dc.subject Predicting a narrow dielectron en_US
dc.subject 2017 en_US
dc.title Search for narrow resonances in dilepton mass spectra in proton–proton collisions at √s=13TeV and combination with 8 TeV data en_US
dc.type Article en_US
dc.contributor.department Dept. of Physics en_US
dc.identifier.sourcetitle Physics Letters B en_US
dc.publication.originofpublisher Foreign en_US


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