arXiv subjects

Meng-yuan Wang

Publications and source records attributed to Meng-yuan Wang.

2 recordsLinked to original sources

arXiv1995

On Constrained-Instanton Valleys

We develop a systematic treatment for the quasi-zero modes, which play an important role in nonabelian gauge theories. It can be used to derive the analytic forms for the constrained instantons in the \ymh theory. This will automatically sum up contributions to all orders in $ρ$, the instanton size. We also give the analytic expressions for the instanton-antiinstanton pair, with an arbitrary relative phase. We apply the results to the computation for high energy baryon number violating cross section, as well as to Klinkhamer's new instanton.

hep-ph↗

arXiv1995

On Multiple Instanton-antiinstanton Configurations

We show why and how the $I\bar I$ valley trajectory commonly used in the literature so far is in fact unsatisfactory. A better $I\bar I$ valley is suggested. We also give analytic expressions for the multiple instanton-antiinstanton configurations in the pure Yang-Mills theory. These formulas make it possible to go beyond the dilute gas approximation and calculate the multi-body interactions among instantons and antiinstantons.

hep-ph↗