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\( \mathcal{O}\left( {{\alpha_s}} \right) \) corrections to J/ψ  + χ cJ production at B factories

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Abstract

We investigate the \( \mathcal{O}\left( {{\alpha_s}} \right) \) corrections to e + e − → J/ψ(ψ′) + χ cJ (J =0, 1, 2) in the NRQCD factorization approach. These next-to-leading order (NLO) corrections are calculated at the level of helicity amplitude. We have made a detailed analysis for both polarized and unpolarized cross sections, and compared our predictions with the measurements at the B factories. We also derive the asymptotic expressions for each of the NLO helicity amplitudes, and confirm the earlier speculation that at NLO in α s , the double logarithm of type \( {\ln^2}\left( {{{s} \left/ {{m_c^2}} \right.}} \right) \) appearing in the NRQCD short-distance coefficient is always associated with the helicity-suppressed channels.

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Authors and Affiliations

  1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China

    Hai-Rong Dong, Feng Feng & Yu Jia

  2. Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing, 100049, China

    Feng Feng & Yu Jia

  3. Maryland Center for Fundamental Physics, Department of Physics, University of Maryland, College Park, MD, 20742, U.S.A.

    Yu Jia

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  1. Hai-Rong Dong
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  2. Feng Feng
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  3. Yu Jia
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Correspondence to Feng Feng.

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ArXiv ePrint: 1107.4351

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Dong, HR., Feng, F. & Jia, Y. \( \mathcal{O}\left( {{\alpha_s}} \right) \) corrections to J/ψ  + χ cJ production at B factories. J. High Energ. Phys. 2011, 141 (2011). https://doi.org/10.1007/JHEP10(2011)141

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