Short and Long Distance Effects in the Decay $τ\to πν_τ (γ)$

Details Short and Long Distance Effects in the Decay $τ\to πν_τ (γ)$ Short and Long Distance Effects in the Decay $τ\to πν_τ (γ)$

1994-03-29

arxiv.org/abs/hep-ph/9403385v2

Nucl.Phys. B438 (1995) 17-53

Physics

High Energy Physics

High Energy Physics - Phenomenology

39 pages, Latex [19 figures, not included]: A complete postscript file, including figures, is available via anonymous ftp at

Scientific paper

10.1016/0550-3213(95)00597-L

We calculate the radiative corrections to the decays $\tau\to M \nu_\tau$ and $\pi \to l \nu_\l$, where the meson $M$ is $M=\pi$ or $K$ and the lepton $l$ is $l = e$ or $\mu$. We perform a complete calculation, which includes internal bremsstrahlung and structure dependent radiation in the radiative decays and point meson, hadronic structure dependent and short distance contributions in the virtual corrections. Our result for the radiative correction to the ratio $\Gamma(\tau\to\pi\nu_\tau(\gamma))/ \Gamma(\pi\to\mu\nu_\mu(\gamma))$ is $\delta R_{\tau/\pi} = \left(0.16_{\T - 0.14}^{\T+0.09}\right) \%$. For the ratio $\Gamma(\tau\to K\nu_\tau(\gamma)) / \Gamma(K\to \mu\nu_\mu(\gamma))$, we obtain $\delta R_{\tau/K } = \left(0.90_{\T - 0.26}^{\T + 0.17}\right) \%$. For completeness we have also calculated the ratio of the electronic and muonic decay modes of the pion.

Affiliated with

Also associated with

No associations

Rating

Short and Long Distance Effects in the Decay $τ\to πν_τ (γ)$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Short and Long Distance Effects in the Decay $τ\to πν_τ (γ)$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Short and Long Distance Effects in the Decay $τ\to πν_τ (γ)$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-10530