Direct Photon Production With Effective Field Theory

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Direct Photon Production With Effective Field Theory

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dc.contributor.author Becher, Thomas
dc.contributor.author Schwartz, Matthew D
dc.date.accessioned 2012-01-30T18:31:54Z
dc.date.issued 2010
dc.identifier.citation Becher, Thomas and Matthew D. Schwartz. 2010. Direct photon production with effective field theory. Journal of High Energy Physics 2010(2): 40. en_US
dc.identifier.issn 1029-8479 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:8063803
dc.description.abstract The production of hard photons in hadronic collisions is studied using Soft-Collinear Effective Theory (SCET). This is the first application of SCET to a physical, observable cross section involving energetic partons in more than two directions. A factorization formula is derived which involves a non-trivial interplay of the angular dependence in the hard and soft functions, both quark and gluon jet functions, and multiple partonic channels. The relevant hard, jet and soft functions are computed to one loop and their anomalous dimensions are determined to three loops. The final resummed inclusive direct photon distribution is valid to next-to-next-to-leading logarithmic order (NNLL), one order beyond previous work. The result is improved by including non-logarithmic terms and photon isolation cuts through matching, and compared to Tevatron data and to fixed order results at the Tevatron and the LHC. The resummed cross section has a significantly smaller theoretical uncertainty than the next-to-leading fixed-order result, particularly at high transverse momentum. en_US
dc.description.sponsorship Physics en_US
dc.language.iso en_US en_US
dc.publisher Springer Verlag en_US
dc.relation.isversionof doi:10.1007/JHEP02(2010)040 en_US
dc.relation.hasversion http://arxiv.org/abs/0911.0681 en_US
dash.license OAP
dc.subject jets en_US
dc.subject hadronic colliders en_US
dc.subject QCD en_US
dc.subject renormalization group en_US
dc.title Direct Photon Production With Effective Field Theory en_US
dc.type Journal Article en_US
dc.description.version Accepted Manuscript en_US
dc.relation.journal Journal of High Energy Physics en_US
dash.depositing.author Schwartz, Matthew D
dc.date.available 2012-01-30T18:31:54Z

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