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Title: QED contribution to the color-singlet J/{psi} production in {Upsilon} decay near the endpoint

Abstract

A recent study indicates that the {alpha}{sup 2{alpha}}{sub s}{sup 2} order QED processes of {Upsilon}{yields}J/{psi}+X decay are compatible with those of QCD processes. However, in the endpoint region, the nonrelativistic QED calculation breaks down since the collinear degrees of freedom are missing under the framework of this effective theory. In this paper we apply the soft-collinear effective theory (SCET) to study the color-singlet QED process at the kinematic limit. Within this approach we are able to sum the kinematic logarithms by running operators using the renormalization group equations of soft-collinear effective theory, which will lead to a dramatic change in the momentum distribution near the endpoint and the spectrum shape consistent with the experimental results.

Authors:
 [1]
  1. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)
Publication Date:
OSTI Identifier:
21409182
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.81.034027; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COLOR MODEL; DEGREES OF FREEDOM; DISTRIBUTION; EQUATIONS; J PSI-3097 MESONS; PARTICLE DECAY; QUANTUM CHROMODYNAMICS; QUANTUM ELECTRODYNAMICS; RENORMALIZATION; SPECTRA; BOSONS; CHARMONIUM; COMPOSITE MODELS; DECAY; ELECTRODYNAMICS; ELEMENTARY PARTICLES; FIELD THEORIES; HADRONS; MATHEMATICAL MODELS; MESONS; PARTICLE MODELS; QUANTUM FIELD THEORY; QUARK MODEL; QUARKONIUM; VECTOR MESONS

Citation Formats

Xiaohui, Liu. QED contribution to the color-singlet J/{psi} production in {Upsilon} decay near the endpoint. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.81.034027.
Xiaohui, Liu. QED contribution to the color-singlet J/{psi} production in {Upsilon} decay near the endpoint. United States. https://doi.org/10.1103/PHYSREVD.81.034027
Xiaohui, Liu. 2010. "QED contribution to the color-singlet J/{psi} production in {Upsilon} decay near the endpoint". United States. https://doi.org/10.1103/PHYSREVD.81.034027.
@article{osti_21409182,
title = {QED contribution to the color-singlet J/{psi} production in {Upsilon} decay near the endpoint},
author = {Xiaohui, Liu},
abstractNote = {A recent study indicates that the {alpha}{sup 2{alpha}}{sub s}{sup 2} order QED processes of {Upsilon}{yields}J/{psi}+X decay are compatible with those of QCD processes. However, in the endpoint region, the nonrelativistic QED calculation breaks down since the collinear degrees of freedom are missing under the framework of this effective theory. In this paper we apply the soft-collinear effective theory (SCET) to study the color-singlet QED process at the kinematic limit. Within this approach we are able to sum the kinematic logarithms by running operators using the renormalization group equations of soft-collinear effective theory, which will lead to a dramatic change in the momentum distribution near the endpoint and the spectrum shape consistent with the experimental results.},
doi = {10.1103/PHYSREVD.81.034027},
url = {https://www.osti.gov/biblio/21409182}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 3,
volume = 81,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 2010},
month = {Mon Feb 01 00:00:00 EST 2010}
}