Resummation of relativistic corrections to e{sup +}e{sup -}{yields}J/{psi}+{eta}{sub c}

Journal Article · Thu May 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.094018· OSTI ID:21250124

Bodwin, Geoffrey T ^[1]; Lee, Jungil ^[1]; Yu, Chaehyun ^[2]

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1. High Energy Physics Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439 (United States)
2. Department of Physics, Korea University, Seoul 136-701 (Korea, Republic of)

We present a new calculation, in the nonrelativistic QCD (NRQCD) factorization formalism, of the relativistic corrections to the double-charmonium cross section {sigma}[e{sup +}e{sup -}{yields}J/{psi}+{eta}{sub c}] at the energy of the Belle and BABAR experiments. In comparison with previous work, our calculation contains several refinements. These include the use of the improved results for the nonperturbative NRQCD matrix elements, the resummation of a class of relativistic corrections, the use of the vector-meson-dominance method to calculate the fragmentation contribution to the pure QED amplitude, the inclusion of the effects of the running of {alpha}, and the inclusion of the contribution that arises from the interference between the relativistic corrections and the corrections of next-to-leading order in {alpha}{sub s}. We also present a detailed estimate of the theoretical uncertainty. We conclude that the discrepancy between the theoretical prediction for {sigma}[e{sup +}e{sup -}{yields}J/{psi}+{eta}{sub c}] and the experimental measurements has been resolved.

• OSTI ID: 21250124
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARMONIUM
COMPARATIVE EVALUATIONS
CORRECTIONS
CROSS SECTIONS
ELECTRON-POSITRON COLLISIONS
ETA MESONS
FACTORIZATION
FORECASTING
FRAGMENTATION
INTERFERENCE
J PSI-3097 MESONS
MATRIX ELEMENTS
QUANTUM CHROMODYNAMICS
QUANTUM ELECTRODYNAMICS
RELATIVISTIC RANGE
VECTOR MESONS