The quark condensate from K_{e_4} decays
Preprint
- 6 March 2001
Abstract
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.Keywords
All Related Versions
- Version 1, 2001-03-06, ArXiv
- Published version: Physical Review Letters, 86 (22), 5008.
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