The quark condensate from K_{e_4} decays

Details The quark condensate from K_{e_4} decays The quark condensate from K_{e_4} decays

2001-03-06

arxiv.org/abs/hep-ph/0103063v1

Phys.Rev.Lett.86:5008-5010,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages (LaTex), 3 figures

Scientific paper

10.1103/PhysRevLett.86.5008

We show that, independently of the size of the quark condensate, chiral
symmetry correlates the two S-wave \pi\pi scattering lengths. In view of this
constraint, the new precision data on K_{e_4} decay allow a remarkably accurate
determination of these quantities. The result confirms the hypothesis that the
quark condensate is the leading order parameter.

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