# The quark condensate from K(e(4)) decays.

@article{Colangelo2001TheQC, title={The quark condensate from K(e(4)) decays.}, author={G Colangelo and J. Gasser and Heinrich Leutwyler}, journal={Physical review letters}, year={2001}, volume={86 22}, pages={ 5008-10 } }

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