Eur. Phys. J. C 70, 177-182 (2010)
https://doi.org/10.1140/epjc/s10052-010-1449-5

Long-distant contribution and χ _c1 radiative decays to light vector meson

¹ Research Center for Hadron and CSR Physics, Lanzhou University & Institute of Modern Physics of CAS, Lanzhou, 730000, China
² Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
³ School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
⁴ Institute of High Energy Physics of CAS, Beijing, 100049, China
⁵ Theoretical Physics Center for Science Facilities (TPCSF), CAS, Beijing, 100049, China

xiangliu@lzu.edu.cn

Received: 24 July 2010
Revised: 29 August 2010
Published online: 5 October 2010

Abstract

The discrepancy between the PQCD calculation and the CLEO data for χ _c1→γ V (V=ρ ⁰, ω, φ) stimulates our interest in exploring other mechanisms of χ _c1 decay. In this work, we apply an important non-perturbative QCD effect, i.e., the hadronic loop mechanism, to study χ _c1→γ V radiative decay. Our numerical result shows that the theoretical results including the hadronic loop contribution and the PQCD calculation of χ _c1→γ V are consistent with the corresponding CLEO data of χ _c1→γ V. We expect further experimental measurement of χ _c1→γ V, which will be helpful to test the hadronic loop effect on χ _c1 decay.