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Abstract

In this paper, we study the application of the recently proposed soft gluon factorization (SGF) to exclusive quarkonium production or decay. We find that in the nonrelativistic QCD factorization framework there are too many nonperturbative parameters. Thanks to the factorization of kinematical physics from dynamical physics, the SGF significantly reduces the number of nonperturbative parameters. Therefore, the SGF can improve our predictive power of exclusive quarkonium production or decay. By applying to ηc + γ production at B-factories, our result is the closest one to data among all theoretical calculations.

Details

Title
Exclusive quarkonium production or decay in soft gluon factorization
Author
Li, Rong 1 ; Yu, Feng 2   VIAFID ORCID Logo  ; Yan-Qing, Ma 3   VIAFID ORCID Logo 

1  Xi’an Jiaotong University, School of Science, Xi’an, China (GRID:grid.43169.39) (ISNI:0000 0001 0599 1243) 
2  Army Medical University, Department of Physics, College of Basic Medical Sciences, Chongqing, China (GRID:grid.43169.39) 
3  Peking University, School of Physics and State Key Laboratory of Nuclear Physics and Technology, Beijing, China (GRID:grid.11135.37) (ISNI:0000 0001 2256 9319); Peking University, Center for High Energy Physics, Beijing, China (GRID:grid.11135.37) (ISNI:0000 0001 2256 9319); Collaborative Innovation Center of Quantum Matter, Beijing, China (GRID:grid.495569.2) 
Publication year
2020
Publication date
May 2020
Publisher
Springer Nature B.V.
e-ISSN
10298479
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/JHEP05(2020)009
ProQuest document ID
2398417057
Copyright
© The Author(s) 2020.