Cusps in K ---> 3 pi decays - INSPIRE

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Cusps in K ---> 3 pi decays

Apr, 2006

14 pages

Published in:

Phys.Lett.B 638 (2006) 187-194

e-Print:

hep-ph/0604084 [hep-ph]

DOI:

10.1016/j.physletb.2006.05.017

Report number:

HISKP-TH-06-09

View in:

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Abstract:

The pion mass difference generates a pronounced cusp in K --> 3 pi decays. As has recently been pointed out by Cabibbo and Isidori, an accurate measurement of the cusp may allow one to pin down the S-wave pi pi scattering lengths to high precision. Here, we present and illustrate an effective field theory framework that allows one to determine the structure of this cusp in a straightforward manner. The strictures imposed by analyticity and unitarity are respected automatically.

11.30.Rd
11.55.Bq
13.75.Lb
13.20.Eb
Chiral symmetries
Analytic properties of the S-matrix
Decays of K-mesons
Meson-meson interactions
Analytic properties of the S -matrix
Decays of K -mesons

References(29)

Figures(0)

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