Alexandria Digital Research Library

Search for supersymmetry in proton-proton collisions at 8 TeV in events with a single lepton, large jet multiplicity, and multiple b jets

Author:
Geffert, Paul B.
Degree Grantor:
University of California, Santa Barbara. Physics
Degree Supervisor:
David Stuart
Place of Publication:
[Santa Barbara, Calif.]
Publisher:
University of California, Santa Barbara
Creation Date:
2014
Issued Date:
2014
Topics:
Physics, Elementary Particles and High Energy
Keywords:
Gluino
CMS
Supersymmetry
Neutralino
LHC
Genres:
Dissertations, Academic and Online resources
Dissertation:
Ph.D.--University of California, Santa Barbara, 2014
Description:

This thesis describes a search for supersymmetry in events with a single lepton, large jet multiplicity, multiple b jets, and significant transverse momentum imbalance in 19.3 fb-1 of pp collisions at center of mass energy of 8 TeV recorded in 2012 by the Compact Muon Solenoid experiment at the Large Hadron Collider. This signature targets strongly produced massive gluinos which decay through top squarks. The observed yields in the signal regions, spanning a broad range of event kinematics, agree with the Standard Model background predictions, which are obtained with a heavy reliance on data control samples. The results of this search are interpreted as cross section limits in the context of simplified supersymmetric scenarios in which gluinos are pair produced and cascade decay to a four top quark, two lightest neutralino final state. By comparing these limits with gluino pair production cross sections, gluinos with mass less than 1 TeV are excluded for low lightest neutralino masses, largely independent of top squark mass.

Physical Description:
1 online resource (257 pages)
Format:
Text
Collection(s):
UCSB electronic theses and dissertations
ARK:
ark:/48907/f3cc0xtx
ISBN:
9781321349412
Catalog System Number:
990045116970203776
Rights:
Inc.icon only.dark In Copyright
Copyright Holder:
Paul Geffert
File Description
Access: Public access
Geffert_ucsb_0035D_12220.pdf pdf (Portable Document Format)