Dimensional renormalization of sealar fi
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Article
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1980
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Elsevier Science
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English
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Consider -A + XV with V short range at a value &, where some eigenvalue e(h) -0 as X L h, ' We analyze two questions: (i) What is the leading order of e(h), i.e., for what 4 does e(X) N c(X-&,)a? (ii) Is e(X) analytic at X = &, and, if not, what is the natural expansion parameter? The results are hi