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arXiv · hep-ph/9411423

$τ\to πK ν$ Decay and $πK$ Scattering

L. Beldjoudi·Tran N. Truong
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Abstract

Using chiral low energy theorems and elastic unitarity assumption, the $τ\toπK ν$ decay is investigated. The vector and scalar $πK$ form factors are calculated. It is found that the $πK$ spectrum is dominated by the $K^*$ resonance. By measuring the forward-backward asymmetry, it is shown that the S wave $πK$ phase shift can be determined near the $K^{*}$ resonance region. The calculated branching ratio and resonance parameters are in good agreement with experiments.

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L. Beldjoudi, Tran N. Truong. 1994-11-29. $τ\to πK ν$ Decay and $πK$ Scattering. https://doi.org/10.1016/0370-2693(95)00158-h

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