Search for pair production of scalar top quarks decaying to a tau lepton and a b quark in 1.96-tev ppbar collisions

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dc.contributor.advisorKamon, Teruki
dc.contributor.advisorSafonov, Alexei
dc.contributor.committeeMemberArnowitt, Richard
dc.contributor.committeeMemberFulling, Stephen
dc.contributor.committeeMemberToback, David
dc.creatorKhotilovich, Vadim Gennadyevich
dc.date.accessioned2010-01-15T00:11:32Z
dc.date.accessioned2010-01-16T00:58:36Z
dc.date.available2010-01-15T00:11:32Z
dc.date.available2010-01-16T00:58:36Z
dc.date.created2008-05
dc.date.issued2009-05-15
dc.description.abstractI present the results of a search for pair production of scalar top quarks (~t1) in an R-parity violating supersymmetric scenario using 322 pb_1 of pp collisions at ps = 1.96 TeV collected by the upgraded Collider Detector at Fermilab. I assume each ~t1 decays into a tau lepton and a b quark, with branching ratio B, and search for final states containing either an electron or a muon from a leptonic tau decay, a hadronically decaying tau lepton, and two or more jets. Two candidate events pass my final selection criteria, consistent with the expectation from standard model processes. I present upper limits on the cross section times branching ratio squared (~t1~t1)B2 as a function of the stop mass m(~t1). Assuming B = 1, I set a 95% confidence level limit m(~t1) > 153 GeV=c2. These limits are also fully applicable to the case of a pair produced third generation scalar leptoquark that decays into a tau lepton and a b quark.en
dc.format.digitalOriginborn digitalen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/1969.1/ETD-TAMU-2814
dc.language.isoen_US
dc.subjectphysicsen
dc.subjectHEPen
dc.subjectsupersymmetryen
dc.subjectSUSYen
dc.subjectRPVen
dc.subjectstopen
dc.subjectleptoquarken
dc.subjecttauen
dc.subjectexperimenten
dc.subjectFermilaben
dc.subjectCDFen
dc.titleSearch for pair production of scalar top quarks decaying to a tau lepton and a b quark in 1.96-tev ppbar collisionsen
dc.typeBooken
dc.typeThesisen
dc.type.genreElectronic Dissertationen
dc.type.materialtexten
thesis.degree.departmentPhysicsen
thesis.degree.disciplinePhysicsen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen

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