Search for the Lepton Flavour Violating Decay in Upsilon(3S) ->emu

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dc.contributor.authorTasneem, Nafisa
dc.contributor.supervisorRoney, J. Michael (John Michael)
dc.date.accessioned2017-09-12T20:15:45Z
dc.date.available2017-09-12T20:15:45Z
dc.date.copyright2017en_US
dc.date.issued2017-09-12
dc.degree.departmentDepartment of Physics and Astronomyen_US
dc.degree.levelDoctor of Philosophy Ph.D.en_US
dc.description.abstractCharged lepton flavour violating processes are highly suppressed in the standard model, but they are predicted to be enhanced in several new physics extensions including supersymmetry and models with leptoquarks or compositeness. Data collected with the BaBar detector at the SLAC PEP-II e$^+$e$^-$ asymmetric collider at a centre-of-mass energy of 10.36~GeV were used to search for electron-muon flavor violation in $\Upsilon (3S)\rightarrow e^{\pm}\mu^{\pm}$ decays. The search was conducted using a data sample in which 118 million $\Upsilon (3S)$ mesons were produced, corresponding to an integrated luminosity of 27~$fb^{-1}$. There is no evidence of a signal in the $\Upsilon (3S)$ data and we report our results as upper limits on $\mathcal{B}(\Upsilon(3S)\rightarrow e^{\pm}\mu^{\mp})<3.6\times10^{-7}\mathrm{at~ 90\%~ CL}$.en_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/8560
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectLepton Flavour Violating Decayen_US
dc.subjectUpsilon decayen_US
dc.subjectNew Physics, Beyond Standard Modelen_US
dc.titleSearch for the Lepton Flavour Violating Decay in Upsilon(3S) ->emuen_US
dc.typeThesisen_US

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