TITLE:
Investigation on Virtual State Contribution to Gauge Invariant Cross Section of e+e-→J/ψ+ηc in Bethe-Salpeter Framework
AUTHORS:
Shashank Bhatnagar, Ming Li, Shiyuan Li
KEYWORDS:
Bethe-Salpeter Wave Function, Virtual States, Relative Momentum
JOURNAL NAME:
Journal of Modern Physics,
Vol.5 No.11,
June
30,
2014
ABSTRACT: It is
shown that the virtual states and relative momentum of the constituents of the
bound states are very important for the cross section of the process
e+e-→J/ψ+ηc
with the help of the Bethe-Salpeter wave
function description of the bound states. The gauge invariance of the cross
section is demonstrated. The numerical results can explain the experimental
data.