Higher-order corrections to exclusive production of charmonia at B factories

2012/09/10 by Ying Fan, Fan, Ying, Jungil Lee +3 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1209.1875

openalex publication_date 2012/09/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

As a test of the color-singlet mechanism of the nonrelativistic QCD (NRQCD) factorization approach, we consider the exclusive two-quarkonium productions in electron-positron annihilation e+ e- -> eta_c + gamma and e+ e- -> J/psi + J/psi at B factories. The cross sections are computed to the next-to-leading order in alpha_s and are resummed to all orders in half the relative velocity v of the charm quark in each meson rest frame. The available theoretical prediction of the cross section for e+ e- -> J/psi + eta_c at the same level of theoretical accuracies is consistent with the available experimental data. Those for e+ e- -> eta_c + gamma and e+ e- -> J/psi + J/psi that are computed new in this work can be tested against the data from future super B factories.

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• Next-to-leading order analysis of J/ψ+ γ production in photon-photon collisions at CEPC

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