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In this work, we study the phenomenology of direct photon production using theoretical predictions at next-to-leading order with threshold resummation up to next-to-leading- logarithmic accuracy . By analyzing the global data sets of direct photons, we have found a good agreement between the theory and the data for a wide range of energies (√s = 23 GeV up to 7 TeV) if we exclude the data from E706 experiment. We have study the potential impact of direct photon data on parton distribution functions using Bayesian reweighting approach. A reduction of 10% around 0.3 < x < 0.6 is observed in the uncertainties of the gluon distribution.
Bayesian Reweighting, Direct Photons, PDFs, Threshold Resummation
Date of Defense
July 9, 2014.
Submitted Note
A Dissertation submitted to the Department of Physics in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
Bibliography Note
Includes bibliographical references.
Advisory Committee
Joseph Francis Owens, Professor Directing Dissertation; Ettore Aldrovandi, University Representative; Laura Reina, Committee Member; Harrison Prosper, Committee Member; Pedro Schlottmann, Committee Member.
Publisher
Florida State University
Identifier
FSU_migr_etd-9085
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