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Title page for ETD etd-03282016-164531

Type of Document Dissertation
Author Melo, Andrew Malone
Author's Email Address andrew.m.melo@vanderbilt.edu
URN etd-03282016-164531
Title A search for supersymmetric top quarks in CMS 8TeV data in the b/τ + jets + met + muon final state
Degree PhD
Department Physics
Advisory Committee
Advisor Name Title
Paul Sheldon Committee Chair
Alan Tackett Committee Member
Charles Maguire Committee Member
Tom Kephart Committee Member
Will Johns Committee Member
  • SUSY
  • CMS
Date of Defense 2016-03-24
Availability unrestricted
This dissertation examines data recorded in 2012 by the Compact Muon

Solenoid (CMS) experiment at the Large Hadron Collider (LHC) to search

for supersymmetric top quark decay. In order to reduce the substantial

backgrounds and properly calibrate simulation with data, the

Simultaneous Heavy Flavor and Tag (SHyFT) method is employed. SHyFT

divides events into bins based on their event content to produce

signal and background-enriched regions. Then, a global fit is

performed over all the bins simultaneously, which not only extracts

the estimated signal contribution, but also constrains the

contributions of the backgrounds and estimates the values of several

systematic uncertainties. Using currently available data, this

dissertation sets limits on the cross-section of particular

supersymmetric models.

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