Journal
PHYSICS LETTERS B
Volume 646, Issue 2-3, Pages 72-79Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2007.01.025
Keywords
chiral symmetries; chiral logarithms
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We investigate two specific Green functions in the framework of chiral perturbation theory. We show that, using analyticity and unitarity, their leading logarithmic singularities can be evaluated in the chiral limit to any desired order in the chiral expansion, with a modest calculational cost. The claim is illustrated with an evaluation of the leading logarithm for the scalar two-point function to five-loop order. (c) 2007 Elsevier B.V. All rights reserved.
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