J/Ψ photo-production at large z in soft collinear effective theory

Sean Fleming, Adam K. Leibovich, Thomas Mehen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

One of the outstanding problems in J/Ψ physics is a systematic understanding of the differential photo-production cross section dσ/dz(γ+p → J/Ψ + X), where z = EΨ,/E gamma;/ in the proton rest frame. The theoretical prediction based on the nonrelativistic QCD (NRQCD) factorization formalism has a color-octet contribution which grows rapidly in the endpoint region, z -→ 1, spoiling perturbation theory. In addition there are subleading operators which are enhanced by powers of 1/(1 - z) and they must be resummed to all orders. Here an update of a systematic analysis is presented. The approach used to organize the endpoint behavior of the photoproduction cross section is based on a combination of NRQCD and soft collinear effective theory. While a final result is not yet available, an intermediate result indicates that better agreement between theory and data will be achieved in this framework.

Original languageEnglish (US)
Title of host publicationProceedings of the Ringberg Workshop on New Trends in HERA Physics 2005
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages239-250
Number of pages12
ISBN (Print)9812568166, 9789812568168
DOIs
StatePublished - 2006
Event5th International Workshop on New Trends in HERA Physics 2005 - Rottach-Egern, Bavaria, Germany
Duration: Oct 2 2005Oct 7 2005

Publication series

NameProceedings of the Ringberg Workshop on New Trends in HERA Physics 2005

Other

Other5th International Workshop on New Trends in HERA Physics 2005
CountryGermany
CityRottach-Egern, Bavaria
Period10/2/0510/7/05

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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