Lawrence Lee

Lawrence Lee's picture
Assistant Professor
University of Tennessee, Knoxville
Research Areas: 
Particle Physics
Research Type: 
Experimentalist
Education: 
Ph.D., Yale University, 2014
Advisor: 
Tobias Golling
Dissertation Title: 
A Search for B-violating Supersymmetry in Multijet Signatures at the ATLAS Experiment
Dissertation Abstract: 

With supersymmetry (SUSY) increasingly constrained, more attention is placed on alternate flavors of SUSY that allow for an unexcluded natural theory. A search for new physics phenomena in all-hadronic signatures in \sqrt{s}=8 TeV pp collisions using an integrated luminosity of 20.3 fb^-1 collected by the ATLAS detector at the LHC will be presented. Within the context of SUSY, gluino pair-production gives rise to multijet final states in models that allow for violation of R-parity. Two types of spectra are evaluated – those that have an effective gluino decay to jets and those in which the lightest SUSY particle is a neutralino through which a gluino can cascade into a higher jet multiplicity. A counting experiment is performed and results are presented for all possible R-parity violating branching fractions to various quark flavors. The relevant theory space is probed in an unprecedented way in a branching ratio space with full generality. This represents the most sensitive result for this kind of supersymmetry to date.