Publication:
Search for Contact Interactions and Large Extra Dimensions in Dimuon Events from pp Collisions at √s = 8 TeV with the ATLAS Detector

dc.contributor.advisorStephane Willocq
dc.contributor.authorVAROL, TÜLİN
dc.contributor.departmentUniversity of Massachusetts Amherst
dc.date2023-09-23 11:03:03
dc.date.accessioned2024-04-26T16:06:44Z
dc.date.available2024-04-26T16:06:44Z
dc.date.issued2015
dc.date.submitted2015
dc.description.abstractA search is conducted for non-resonant new phenomena in the dimuon final states, originating from either contact interactions or large extra spatial dimensions. The proton-proton collision data recorded by the ATLAS detector at the LHC in 2012 at √s = 8 TeV, corresponding to an integrated luminosity of 20.5 fb-1, is used. The dimuon invariant mass spectrum is a discriminating variable in both searches, with the contact interaction search additionally utilizing the dimuon forward-backward asymmetry. No significant deviations from the Standard Model expectation are observed. Lower limits are set on the new physics parameters of interest at 95% credibility level. For qqμμ contact interactions, lower limits are set on the contact interaction scale Λ between 11.8 and 20.5 TeV. Lower limits are also set on the string scale MS for large extra spatial dimensions, from 2.8 TeV to 4.4 TeV. Results from the muon channel are combined with the electron channel to further extend the range of the lower limits on the contact interaction scale Λ to 15.4-26.3 TeV and the range of the lower limits on the string scale MS to 3.2-5.0 TeV. The lower limits both on Λ and MS are the most stringent limits to date.
dc.description.degreeDoctor of Philosophy (PhD)
dc.description.departmentPhysics
dc.identifier.doihttps://doi.org/10.7275/6446663.0
dc.identifier.orcidN/A
dc.identifier.urihttps://hdl.handle.net/20.500.14394/19532
dc.relation.urlhttps://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1330&context=dissertations_2&unstamped=1
dc.source.statuspublished
dc.subjectHigh Energy Physics
dc.subjectNon-Resonant Dileptons
dc.subjectLHC
dc.subjectATLAS
dc.subjectElementary Particles and Fields and String Theory
dc.titleSearch for Contact Interactions and Large Extra Dimensions in Dimuon Events from pp Collisions at √s = 8 TeV with the ATLAS Detector
dc.typeopenaccess
dc.typedissertation
digcom.contributor.authorisAuthorOfPublication|email:tvarol@physics.umass.edu|institution:University of Massachusetts Amherst|VAROL, TÜLİN
digcom.identifierdissertations_2/330
digcom.identifier.contextkey6446663
digcom.identifier.submissionpathdissertations_2/330
dspace.entity.typePublication
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