A New Dispersive Analysis of eta --> 3 pi

Details A New Dispersive Analysis of eta --> 3 pi A New Dispersive Analysis of eta --> 3 pi

2009-10-05

arxiv.org/abs/0910.0765v1

PoSCD09:047,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 4 figures, to be published in the proceedings of 6th International Workshop on Chiral Dynamics, CD09, July 6-10, 2009

Scientific paper

We present a new dispersive analysis of the isospin breaking decay eta --> 3
pi. The resulting representation of the decay amplitude allows us to determine
the quark mass double ratio Q and we find as a preliminary result Q = 22.3 +/-
0.4. Finally, we discuss a number of improvements that we intend to implement
in the future.

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