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Communication Dans Un Congrès Année : 2009

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

Résumé

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.

Dates et versions

hal-00424068 , version 1 (14-10-2009)

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M. Zdrahal, K. Kampf, M. Knecht, J. Novotny. Construction of the eta->3pi (and K->3pi) amplitudes using dispersive approach. 6th International Workshop on Chiral Dynamics, CD09, Jul 2009, Bern, Switzerland. pp.122. ⟨hal-00424068⟩
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