Abstract
We consider the production of η c and χ cJ states recoiled with a photon up-to \( \mathcal{O}\left({\alpha}_s{v}^2\right) \) at BESIII and B-factories within the frame of NRQCD factorization. With the corrections, we revisit the numerical calculations to the cross sections for η c (nS) and χ cJ (mP ) states. We argue that the search for XY Z states with even charge conjugation such as X(3872), X(3940), X(4160), and X(4350) recoiled with a photon at BESIII may help clarify the nature of these states. For completeness, the production of charmonium with even charge conjugation recoiled with a photon at B factories is also discussed.
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Xu, GZ., Li, YJ., Liu, KY. et al. α s v 2 corrections to η c and χ cJ production recoiled with a photon at e + e − colliders. J. High Energ. Phys. 2014, 71 (2014). https://doi.org/10.1007/JHEP10(2014)071
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DOI: https://doi.org/10.1007/JHEP10(2014)071