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High Energy Physics - Phenomenology

arXiv:hep-ph/9806484 (hep-ph)
[Submitted on 25 Jun 1998]

Title:Sudakov Resummation for Prompt-Photon Production in Hadron Collisions

Authors:S. Catani, M.L. Mangano, P. Nason
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Abstract: We present the explicit expressions for the resummation of large-x Sudakov effects in the transverse-energy distribution of prompt-photons produced in hadronic collisions, to next-to-leading logarithmic (NLL) accuracy. Fragmentation processes do not contribute to the Sudakov resummation at NLL level. In Mellin space, the resummed radiative factor factorizes in the product of independent radiators for the two initial and the one final coloured partons appearing in the Born process, times a simple factor describing the soft-gluon interferences between initial and final states. The formulae are given in terms of Mellin moments, and can be used for phenomenological applications using standard techniques for the inverse-Mellin transforms. The calculations presented in this work, when added to the existing works on DY and DIS production, complete the theoretical ground-work necessary to carry out global fits of parton densities with a uniform NLL accuracy in the large-x region.
Comments: 1+26 pages, Latex, epsfig, 1 figure
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: CERN-TH/98-214
Cite as: arXiv:hep-ph/9806484
  (or arXiv:hep-ph/9806484v1 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/9806484
Journal reference: JHEP 9807:024,1998
Related DOI: https://doi.org/10.1088/1126-6708/1998/07/024

Submission history

From: Michelangelo Mangano [view email]
[v1] Thu, 25 Jun 1998 17:09:14 UTC (37 KB)
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