On Constrained-Instanton Valleys
نویسنده
چکیده
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 Yang-Mills-Higgs 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.
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