Angular Distribution of Prompt Photons Using the Compact Muon Solenoid Detector at √S =7 TeV Dissertation

(2012). Angular Distribution of Prompt Photons Using the Compact Muon Solenoid Detector at √S =7 TeV . 10.25148/etd.FI12111303

thesis or dissertation chair

authors

  • Werner, Vanessa Gaultney

abstract

  • The study of the angular distribution of photon plus jet events in pp collisions at √S =7 TeV with the Compact Muon Solenoid (CMS) detector is presented. The photon is restricted to the central region of the detector (|η| < 1.4442) while the jet is allowed to be present in both central and forward regions of CMS |η| < 2.4). Dominant backgrounds due to jets fragmenting into neutral mesons are accounted for through the use of a template method that discriminates between signal and background. The angular distribution, |η*|, is defined as the absolute value of the difference in η between the leading photon and leading jet in an event divided by two. The angular distribution ranging from 0-1.4 was examined and compared with next-to-leading order QCD predictions and was found to be in good agreement.

publication date

  • September 14, 2012

keywords

  • CMS
  • LHC
  • QCD
  • Teraelectron volts
  • direct photons
  • next to leading order
  • prompt photons

Digital Object Identifier (DOI)