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

Publication ,  Journal Article
Fleming, S; Leibovich, AK; Mehen, T
Published in: Proceedings of the Ringberg Workshop on New Trends in HERA Physics 2005
January 1, 2006

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. Copyright © 2006 by World Scientific Publishing Co. Pte. Ltd.

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

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Publication Date

January 1, 2006

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239 / 250
 

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Fleming, S., Leibovich, A. K., & Mehen, T. (2006). J/Ψ photo-production at large z in soft collinear effective theory. Proceedings of the Ringberg Workshop on New Trends in HERA Physics 2005, 239–250. https://doi.org/10.1142/9789812773524_0022
Fleming, S., A. K. Leibovich, and T. Mehen. “J/Ψ photo-production at large z in soft collinear effective theory.” Proceedings of the Ringberg Workshop on New Trends in HERA Physics 2005, January 1, 2006, 239–50. https://doi.org/10.1142/9789812773524_0022.
Fleming S, Leibovich AK, Mehen T. J/Ψ photo-production at large z in soft collinear effective theory. Proceedings of the Ringberg Workshop on New Trends in HERA Physics 2005. 2006 Jan 1;239–50.
Fleming, S., et al. “J/Ψ photo-production at large z in soft collinear effective theory.” Proceedings of the Ringberg Workshop on New Trends in HERA Physics 2005, Jan. 2006, pp. 239–50. Scopus, doi:10.1142/9789812773524_0022.
Fleming S, Leibovich AK, Mehen T. J/Ψ photo-production at large z in soft collinear effective theory. Proceedings of the Ringberg Workshop on New Trends in HERA Physics 2005. 2006 Jan 1;239–250.

Published In

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

DOI

Publication Date

January 1, 2006

Start / End Page

239 / 250