paper

The quark condensate from K_{e_4} decays

arXiv:hep-ph/0103063 · doi:10.1103/PhysRevLett.86.5008

Abstract

We show that, independently of the size of the quark condensate, chiral symmetry correlates the two S-wave ππscattering 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.

4 pages (LaTex), 3 figures

The quark condensate from K_{e_4} decays · wovepaper