Search for a Three Lepton and Missing Transverse Energy Signature of Supersymmetry Using a Multivariate Analysis

Persistent Link:
http://hdl.handle.net/10150/293392
Title:
Search for a Three Lepton and Missing Transverse Energy Signature of Supersymmetry Using a Multivariate Analysis
Author:
Lampen, Caleb Parnell
Issue Date:
2013
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A search for evidence of supersymmetry with a three lepton and missing transverse energy signature is presented. This signature is a possible final state from the associated production of a chargino and a neutralino, two particles predicted by supersymmetry. The study is performed on 2.06 fb⁻¹ of 7 TeV center of mass energy proton-proton collisions, recorded with the ATLAS experiment at the Large Hadron Collider in 2011. A multivariate analysis is utilized, implementing a boosted decision tree classifier using lepton p(T), missing transverse energy, dilepton mass, and the razor variable R as inputs. No significant excess over the Standard Model prediction is observed, and upper limits are placed on the cross section times branching ratio of simplified models across a mass parameter space.
Type:
text; Electronic Dissertation
Keywords:
Multivariate; Physics; Supersymmetry; lepton
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Physics
Degree Grantor:
University of Arizona
Advisor:
Cheu, Elliott

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleSearch for a Three Lepton and Missing Transverse Energy Signature of Supersymmetry Using a Multivariate Analysisen_US
dc.creatorLampen, Caleb Parnellen_US
dc.contributor.authorLampen, Caleb Parnellen_US
dc.date.issued2013-
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA search for evidence of supersymmetry with a three lepton and missing transverse energy signature is presented. This signature is a possible final state from the associated production of a chargino and a neutralino, two particles predicted by supersymmetry. The study is performed on 2.06 fb⁻¹ of 7 TeV center of mass energy proton-proton collisions, recorded with the ATLAS experiment at the Large Hadron Collider in 2011. A multivariate analysis is utilized, implementing a boosted decision tree classifier using lepton p(T), missing transverse energy, dilepton mass, and the razor variable R as inputs. No significant excess over the Standard Model prediction is observed, and upper limits are placed on the cross section times branching ratio of simplified models across a mass parameter space.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
dc.subjectMultivariateen_US
dc.subjectPhysicsen_US
dc.subjectSupersymmetryen_US
dc.subjectleptonen_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplinePhysicsen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorCheu, Elliotten_US
dc.contributor.committeememberJohns, Kennethen_US
dc.contributor.committeememberSu, Shufangen_US
dc.contributor.committeememberToussaint, Douglasen_US
dc.contributor.committeememberVarnes, Erichen_US
dc.contributor.committeememberCheu, Elliotten_US
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