Measurement of the isolated photon cross section with conversions in pp collisions at s = 7 TeV
by Kolberg, Ted R., Ph.D., UNIVERSITY OF NOTRE DAME, 2011, 171 pages; 3496576

Abstract:

We present a measurement of the isolated direct photon cross section using 36.1 pb–1 of pp collision data at [special characters omitted] = 7 TeV collected with the Compact Muon Solenoid (CMS) experiment during the 2010 physics run of the CERN Large Hadron Collider (LHC). The measurement is performed on events where the photon candidate converts into an e+e– pair in the material of the inner tracking system. The transverse momentum of the conversion track pair is compared with the transverse energy measured in the CMS electromagnetic calorimeter (ECAL), and is then used to subtract the background due to e.g. π0 → γγ decays. We measure the photon cross section over a range of photon transverse momentum and pseudorapidity and find that it agrees with the predictions of perturbative quantum chromodynamics (QCD) calculations.
 
AdviserColin Jessop
SchoolUNIVERSITY OF NOTRE DAME
SourceDAI/B 73-06, p. , Feb 2012
Source TypeDissertation
SubjectsParticle physics
Publication Number3496576
Adobe PDF Access the complete dissertation:
 

» Find an electronic copy at your library.
  Use the link below to access a full citation record of this graduate work:
  http://gateway.proquest.com/openurl%3furl_ver=Z39.88-2004%26res_dat=xri:pqdiss%26rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation%26rft_dat=xri:pqdiss:3496576
  If your library subscribes to the ProQuest Dissertations & Theses (PQDT) database, you may be entitled to a free electronic version of this graduate work. If not, you will have the option to purchase one, and access a 24 page preview for free (if available).

About ProQuest Dissertations & Theses
With over 2.3 million records, the ProQuest Dissertations & Theses (PQDT) database is the most comprehensive collection of dissertations and theses in the world. It is the database of record for graduate research.

The database includes citations of graduate works ranging from the first U.S. dissertation, accepted in 1861, to those accepted as recently as last semester. Of the 2.3 million graduate works included in the database, ProQuest offers more than 1.9 million in full text formats. Of those, over 860,000 are available in PDF format. More than 60,000 dissertations and theses are added to the database each year.

If you have questions, please feel free to visit the ProQuest Web site - http://www.proquest.com - or call ProQuest Hotline Customer Support at 1-800-521-3042.