Regular Article - Theoretical Physics
Next-to-leading-order QCD corrections to heavy quark fragmentation into quarkonia
School of Physical Science and Technology, Southwest University, 400700, Chongqing, China
2 China University of Mining and Technology, 100083, Beijing, China
3 Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
4 School of Physics, University of Chinese Academy of Sciences, 100049, Beijing, China
Accepted: 25 June 2021
Published online: 9 July 2021
Within NRQCD factorization framework, in this work we compute, at the lowest order in velocity expansion, the next-to-leading-order (NLO) perturbative corrections to the short-distance coefficients associated with heavy quark fragmentation into the components of a heavy quarkonium. Starting from the Collins and Soper’s operator definition of the quark fragmentation function, we apply the sector decomposition method to facilitate the numerical manipulation. It is found that the NLO QCD corrections have a significant impact.
© The Author(s) 2021
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