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

Authors

Vanessa Gaultney Werner, Florida International UniversityFollow

Document Type

Dissertation

Degree

Doctor of Philosophy (PhD)

Major/Program

Physics

First Advisor's Name

Pete Markowitz

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

Stephan Linn

Third Advisor's Name

Jorge Rodriguez

Fourth Advisor's Name

Joerg Reinhold

Fifth Advisor's Name

Eric Brewe

Keywords

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

Date of Defense

9-14-2012

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.

Identifier

FI12111303

Recommended Citation

Werner, Vanessa Gaultney, "Angular Distribution of Prompt Photons Using the Compact Muon Solenoid Detector at √S =7 TeV" (2012). FIU Electronic Theses and Dissertations. 727.
https://digitalcommons.fiu.edu/etd/727