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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.
A Dissertation submitted to the Department of Physics in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
Includes bibliographical references.
Joseph Francis Owens, Professor Directing Dissertation; Ettore Aldrovandi, University Representative; Laura Reina, Committee Member; Harrison Prosper, Committee Member; Pedro Schlottmann, Committee Member.
Florida State University
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