Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-11-29
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, LaTeX, typos corrected and a KUNS preprint number changed
Scientific paper
In models with extra dimensions, branes have been usually treated as solid bodies though they are prohibited by the relativity. In the previous letter, we proposed a method of taking account of brane fluctuation by introducing Nambu-Goldstone bosons, and prove that when a tension of the brane is small, the interaction between boundary fields and Kaluza-Klein modes is suppressed exponentially. In this letter, we further investigate this suppression in more generic configuration, and obtain three counting rules, ``AND'', ``OR'' and ``STACK'' rules, depending on the softness of branes and the character of fields on the branes four dimensions. The choice determines the number of Kaluza-Klein towers contributing to renormalization group equations, leading to a remarkable change in the running behavior of coupling constants.
Bando Masako
Noguchi Tatsuya
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