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arXiv · 0910.1721

Construction of the eta->3pi (and K->3pi) amplitudes using dispersive approach

M. Zdrahal·K. Kampf·M. Knecht·J. Novotny
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Abstract

The dispersive approach based only on very general principles, unitarity, analyticity and crossing symmetry, combined with chiral counting enables to construct fully relativistic model-independent representations of the eta and K three-pion decays valid up to and including two-loop corrections. Here we demonstrate the procedure on the eta->3pi^0 decay. We perform possible matchings of our dispersive approach with the two-loop ChPT result and briefly discuss corresponding predictions of the Dalitz plot slope parameter alpha.

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M. Zdrahal, K. Kampf, M. Knecht, J. Novotny. 2009-10-09. Construction of the eta->3pi (and K->3pi) amplitudes using dispersive approach. https://arxiv.org/abs/0910.1721

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