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Thesis_Final.pdf (10.3 MB)
ETD Abstract Container
Abstract Header
Search for displaced leptons in the e-mu final state at the CMS experiment
Author Info
Liu, Bingxuan
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=osu1476805042657329
Abstract Details
Year and Degree
2016, Doctor of Philosophy, Ohio State University, Physics.
Abstract
A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at a center-of-mass energy of 13 TeV. Data used for the analysis were collected by the CMS detector during the 2015 run and correspond to an integrated luminosity of 2.6 inverse-femtobarns. Events are selected with an electron and muon that both have transverse impact parameter values between 0.02 cm and 10 cm. The search has been designed to be sensitive to a wide range of models with non-prompt e-mu final states. No significant excess is observed. Limits are set on the "displaced supersymmetry" model, with pair production of top squarks decaying into an e-mu final state via R-parity-violating interactions. The results are the most restrictive to date on this model, with the most stringent limit being obtained for a top squark lifetime corresponding to ctau = 2 cm, excluding masses below 870 GeV at 95% confidence level. In addition, the previous search for displaced leptons in the e-mu final state using proton-proton collisions produced by the LHC at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 inverse-femtobarns, and the work done during the Long-term Shutdown 1 (LS1) of the LHC to improve this search are included as well.
Committee
Stan Durkin (Advisor)
Christopher Hill (Committee Member)
Junko Shigemitsu (Committee Member)
Louis DiMauro (Committee Member)
Pages
227 p.
Subject Headings
Physics
Keywords
LHC
;
CMS
;
Exotica
;
Long-lived
;
RPV SUSY
;
BSM
;
Particle Physics
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Citations
Liu, B. (2016).
Search for displaced leptons in the e-mu final state at the CMS experiment
[Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1476805042657329
APA Style (7th edition)
Liu, Bingxuan.
Search for displaced leptons in the e-mu final state at the CMS experiment.
2016. Ohio State University, Doctoral dissertation.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=osu1476805042657329.
MLA Style (8th edition)
Liu, Bingxuan. "Search for displaced leptons in the e-mu final state at the CMS experiment." Doctoral dissertation, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1476805042657329
Chicago Manual of Style (17th edition)
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Document number:
osu1476805042657329
Download Count:
504
Copyright Info
© 2016, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.