Search for Pair Production of Third-Generation Scalar Leptoquarks and R-Parity Violating Top Squarks in Proton-Proton Collisions at sqrt(s) = 8 TeV
| dc.contributor.advisor | Eno, Sarah | en_US |
| dc.contributor.author | Pedro, Kevin | en_US |
| dc.contributor.department | Physics | en_US |
| dc.contributor.publisher | Digital Repository at the University of Maryland | en_US |
| dc.contributor.publisher | University of Maryland (College Park, Md.) | en_US |
| dc.date.accessioned | 2015-02-07T06:30:45Z | |
| dc.date.available | 2015-02-07T06:30:45Z | |
| dc.date.issued | 2014 | en_US |
| dc.description.abstract | This dissertation presents a search for pair production of third-generation scalar leptoquarks or top squarks in R-parity violating supersymmetry decaying through the coupling λ′<sub>333</sub>, with the new scalar particle decaying to a tau lepton and a bottom quark. The data used in this search were collected by the Compact Muon Solenoid experiment and comprise 19.7 fb<sup>-1</sup> of proton-proton collision data from the Large Hadron Collider at a center-of-mass energy of √(s) = 8 TeV. No excess of events above the standard model background prediction is observed. The existence of third-generation scalar leptoquarks or top squarks with masses below 740 GeV is excluded at the 95% confidence level, assuming the branching fraction for the decay to a tau lepton and a bottom quark is 100%. This is currently the strongest limit on this kind of leptoquark or top squark. The search is extended to address a chargino-mediated decay of the top squark involving the R-parity violating coupling λ′<sub>3jk</sub>, producing a tau lepton, a bottom quark, and two light quarks. The existence of top squarks in this model with masses below 580 GeV is excluded at the 95% confidence level. This is the first search for the pair production of top squarks with the decay involving the R-parity violating coupling λ′<sub>3jk</sub>. | en_US |
| dc.identifier | https://doi.org/10.13016/M26C9Q | |
| dc.identifier.uri | http://hdl.handle.net/1903/16252 | |
| dc.language.iso | en | en_US |
| dc.subject.pqcontrolled | Particle physics | en_US |
| dc.subject.pquncontrolled | CMS | en_US |
| dc.subject.pquncontrolled | Leptoquark | en_US |
| dc.subject.pquncontrolled | LHC | en_US |
| dc.subject.pquncontrolled | RPV | en_US |
| dc.subject.pquncontrolled | Supersymmetry | en_US |
| dc.title | Search for Pair Production of Third-Generation Scalar Leptoquarks and R-Parity Violating Top Squarks in Proton-Proton Collisions at sqrt(s) = 8 TeV | en_US |
| dc.type | Dissertation | en_US |
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