Charm meson scattering cross sections by pion and rho meson

✍ Scribed by Ziwei Lin; T.G. Di; C.M. Ko

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 189 KB
• Volume: 689
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)00611-4

✦ Synopsis

Using the local flavor SU(4) gauge invariance in the limit of vanishing vector-meson masses, we extend our previous study of charm-meson scattering cross sections by pion and rho meson, which is based only on the pseudoscalar-pseudoscalar-vector meson couplings, to include also contributions from the couplings among three vector mesons and among four particles. We find that diagrams with light-meson exchanges usually dominate the cross sections. For the processes considered previously, the additional interactions lead only to diagrams involving charm-meson exchanges and contact interactions, and the cross sections for these processes are thus not much affected. Nevertheless, these additional interactions introduce new processes with light-meson exchanges and increase significantly the total scattering cross sections of charm mesons by pion and rho meson.