Radiative pion decay: Determination of FA(0) from τ-lepton decay data

C. A. Dominguez; J. Solà

doi:10.1016/0370-2693(88)91217-8

Radiative pion decay: Determination of FA(0) from τ-lepton decay data

C. A. Dominguez, J. Solà

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Abstract

The form factor FA(0) in π→eνγ is calculated, at the soft pion point, directly from data on the semileptonic τ-lepton decays τ→ντ + nπ, which determine the relevant vector and axial-vector hadronic spectral functions. The reliability of this calculation is assessed by using these fitted spectral functions to check the saturation of the first two Weinberg sum rules. The results are: FA(0)=0.017±0.004, and γ(0)FA(0)/FV(0)=0.67±0.04±0.16. © 1988.

Original language	English
Pages (from-to)	131-134
Journal	Physics Letters B
Volume	208
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(88)91217-8
Publication status	Published - 7 Jul 1988

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title = "Radiative pion decay: Determination of FA(0) from τ-lepton decay data",

abstract = "The form factor FA(0) in π→eνγ is calculated, at the soft pion point, directly from data on the semileptonic τ-lepton decays τ→ντ + nπ, which determine the relevant vector and axial-vector hadronic spectral functions. The reliability of this calculation is assessed by using these fitted spectral functions to check the saturation of the first two Weinberg sum rules. The results are: FA(0)=0.017±0.004, and γ(0)FA(0)/FV(0)=0.67±0.04±0.16. {\textcopyright} 1988.",

author = "Dominguez, {C. A.} and J. Sol{\`a}",

year = "1988",

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language = "English",

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T1 - Radiative pion decay: Determination of FA(0) from τ-lepton decay data

AU - Dominguez, C. A.

AU - Solà, J.

PY - 1988/7/7

Y1 - 1988/7/7

N2 - The form factor FA(0) in π→eνγ is calculated, at the soft pion point, directly from data on the semileptonic τ-lepton decays τ→ντ + nπ, which determine the relevant vector and axial-vector hadronic spectral functions. The reliability of this calculation is assessed by using these fitted spectral functions to check the saturation of the first two Weinberg sum rules. The results are: FA(0)=0.017±0.004, and γ(0)FA(0)/FV(0)=0.67±0.04±0.16. © 1988.

AB - The form factor FA(0) in π→eνγ is calculated, at the soft pion point, directly from data on the semileptonic τ-lepton decays τ→ντ + nπ, which determine the relevant vector and axial-vector hadronic spectral functions. The reliability of this calculation is assessed by using these fitted spectral functions to check the saturation of the first two Weinberg sum rules. The results are: FA(0)=0.017±0.004, and γ(0)FA(0)/FV(0)=0.67±0.04±0.16. © 1988.

U2 - 10.1016/0370-2693(88)91217-8

DO - 10.1016/0370-2693(88)91217-8

M3 - Article

VL - 208

SP - 131

EP - 134

IS - 1

ER -

Radiative pion decay: Determination of FA(0) from τ-lepton decay data

Abstract

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