Perturbative QCD analysis of exclusive processes e+eVP and e+eTP

Lü, Cai-Dian (Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China) (School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China) ; Wang, Wei (INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, MOE Key Laboratory for Particle Physics, Astrophysics and Cosmology School of Physics and Astronomy, Shanghai JiaoTong University, Shanghai 200240, China) ; Xing, Ye (INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, MOE Key Laboratory for Particle Physics, Astrophysics and Cosmology School of Physics and Astronomy, Shanghai JiaoTong University, Shanghai 200240, China) ; Zhang, Qi-An (Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China) (School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China)

12 June 2018

Abstract: We study the e+eVP and e+eTP processes in the perturbative QCD approach based on kT factorization, where the P, V and T denotes a light pseudoscalar, vector, and tensor meson, respectively. We point out in the case of e+eTP transition due to charge conjugation invariance, only three channels are allowed: e+ea2±π, e+eK2*±K and the V-spin suppressed e+eK2*0K¯0+K¯2*0K0. Cross sections of e+eVP and e+eTP at s=3.67 GeV and s=10.58 GeV are calculated and the invariant mass dependence is found to favor the 1/s4 power law. Most of our theoretical results are consistent with the available experimental data and other predictions can be tested at the ongoing BESIII and forthcoming Belle-II experiments.


Published in: Physical Review D 97 (2018)
Published by: APS
DOI: 10.1103/PhysRevD.97.114016
arXiv: 1802.09718
License: CC-BY-4.0



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