Author:
Li Yun,Zou Zhi-Tian,Shen Yue-Long,Li Ying
Abstract
Abstract
Using the perturbative QCD approach, we studied the effects of the hadronic structure of photons on the pure annihilation rediative decays
and
. These decays have small branching fractions due to the power suppression by
, which makes them very sensitive to next-leading power corrections. The quark components and the related two-particle distribution amplitudes of a final state photon are introduced. The branching fractions can be enhanced remarkably by factorizable and nonfactorizable emission diagrams. The branching fraction of
increases by approximately 40 times, and those of
and
are on the order of
. We also note that the ratio of branching fractions of
and
is very sensitive to the effects of the hadronic structure of photons. All these results can be tested in future.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics