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A Search for First Generation Leptoquarks in s^1/2 = 7 TeV pp Collisions with the ATLAS Detector

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dc.contributor.advisor Rijssenbeek, Michael , Tsybychev, Dmitri en_US
dc.contributor.author Stupak III, John en_US
dc.contributor.other Department of Physics en_US
dc.date.accessioned 2013-05-22T17:35:39Z
dc.date.accessioned 2015-04-24T14:47:31Z
dc.date.available 2013-05-22T17:35:39Z
dc.date.available 2015-04-24T14:47:31Z
dc.date.issued 2012-08-01
dc.identifier StupakIII_grad.sunysb_0771E_11014 en_US
dc.identifier.uri http://hdl.handle.net/1951/59877 en_US
dc.identifier.uri http://hdl.handle.net/11401/71424 en_US
dc.description 179 pg. en_US
dc.description.abstract The Standard Model is an incomplete theory of nature. Numerous extensions of the Standard Model predict the existence of leptoquarks (LQ), color-triplet bosons which carry both baryon and lepton number. This dissertation presents the results of a search for pair production of first generation scalar leptoquarks in the eMETjj final state. The search is performed in pp collisions corresponding to an integrated luminosity of 1.03 fb^-1, at a center-of-mass energy s^1/2 = 7 TeV, recorded with the ATLAS detector at the LHC. A multivariate discriminant is used to distinguish signal-like events from background-like events. Observations are consistent with expectations from Standard Model backgrounds, thus limits on allowed LQ mass are determined. First generation scalar leptoquarks with mass m < 558 GeV are excluded at a 95% confidence level for Β = BR(LQ % → eq) = 0.5. When combined with a complimentary search in the eejj final state, leptoquarks with mass m < 607 (660) GeV are excluded for Β = 0.5 (1.0). These are the strongest limits in existence. en_US
dc.description.sponsorship This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Physics en_US
dc.subject.other Leptoquark ATLAS LHC High-Energy Physics en_US
dc.title A Search for First Generation Leptoquarks in s^1/2 = 7 TeV pp Collisions with the ATLAS Detector en_US
dc.type Dissertation en_US
dc.mimetype Application/PDF en_US

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