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Title page for ETD etd-03282016-024723


Type of Document Dissertation
Author Delannoy Sotomayor, Andres Guillermo
Author's Email Address andres.delannoy@gmail.com
URN etd-03282016-024723
Title Search for dark matter and supersymmetry via vector boson fusion at the Large Hadron Collider
Degree PhD
Department Physics
Advisory Committee
Advisor Name Title
Will E. Johns Committee Chair
Andreas Berlind Committee Member
Julia Velkovska Committee Member
Paul Sheldon Committee Member
Thomas Kephart Committee Member
Keywords
  • vector boson fusion
  • supersymmetry
  • dark matter
  • LHC
  • CMS
Date of Defense 2016-03-23
Availability unrestricted
Abstract
A first search for pair production of dark matter candidates through vector boson fusion, in proton-proton collisions at sqrt(s) = 8 TeV, is performed with the CMS detector. The vector boson fusion topology enhances missing transverse momentum, providing a way to probe supersymmetry also in the case of compressed mass spectrum. The observed dijet mass spectrum is compatible with the background prediction. Upper limits are set on the production cross section of dark matter particles using an effective field theory. Production of a bottom squark with mass below 315 GeV is excluded at 95% confidence limit, assuming a 5 GeV mass difference with the lightest neutralino.
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