Initial state radiation effects in inclusive $J/\psi$ production at B factories

Abstract

Based on Monte Carlo techniques, we analyze the initial state radiation (ISR) effects in prompt $\jpsi$ inclusive production at B factories. ISR enhances cross section $σ(e^-e^+\to\jpsi+gg+X)$ by about $15-25\%$, which is almost the same size as the QCD and relativistic correction. Moreover, ISR slightly changes $σ(e^-e^+\to\jpsi+c\bar{c}+X)$. The $\jpsi$ momentum spectrum in $e^-e^+\to\jpsi+gg+X$ and in $e^-e^+\to\jpsi+c\bar{c}+X$ is softer after the photon showering from the initial $e^{\pm }$ beam radiation. After combining the QCD,relativistic, and ISR corrections,a more precise theoretical result is obtained. The new result provides a more stringent constraint of the color-octet contribution to $σ(e^-e^+\to\jpsi+X_{\rm{non-}c\bar{c}})$.

journal version;16 pages, 9 figures, 4 tables

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Cited by in corpus (5)

• New Observables in Inclusive Production of Quarkonia
• ${\eta }_c$ production associated with light hadrons at the B-factories and the future super B-factories
• Color-octet contributions for $J/\psi$ inclusive production at B factories in soft gluon factorization
• Perturbative QCD for $J/\psi$ Inclusive Production Via Initial State Radiation at $e^{+}{e}^{-}$ collider
• Automated event generation for S-wave quarkonium and leptonium production in NRQCD and NRQED