Three-hadron form factor via quark-triangle loop |
| |
Authors: | W -Y P Hwang A N Mitra |
| |
Institution: | (1) Department of Physics, National Taiwan University, 10764 Taipei, Taiwan Republic of China;(2) Department of Physics and Astrophysics, University of Delhi, 110007 Delhi, India |
| |
Abstract: | An explicit construction in a manifestly Lorentz-invariant and cyclically symmetric form is given for a three-hadron (H) coupling through their respective (q
) constituents interacting via a quark triangle loop under the most general conditions of unequal mass kinematics atboth the elementary quark and composite-hadron levels. The only ansatz employed is that theHq
vertex function H at each vertexi is a function of
i
, the relative momentumtransverse to the corresponding hadron momentumP
i, an assumption which can be justified from several independent angles. The resulting structure
, withD(
) being a model-independent function, has proved crucial for an explicit integration over the time-like component of the loop momentum, and thus provided an analytical, cyclically symmetric structure free of overlapping pole singularities. The applicational potential of this quantity is outlined. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|