/ Experiment-HEP arXiv:1104.1585

Search for the Rare Radiative Decay: $W\rightarrow\pi\gamma$ in $p\bar{p}$ Collisions at $\sqrt{s} = 1.96$ TeV

Published in: Phys.Rev.Lett.

Abstract: We present a search for the rare radiative decay $W\rightarrow\pi\gamma$ using data corresponding to an integrated luminosity of 4.3 fb$^{-1}$ of proton-antiproton collisions at a center of mass energy of 1.96 TeV collected by the CDF experiment at Fermilab. As no statistically significant signal is observed, we set a 95\% confidence level upper limit on the relative branching fraction $\Gamma (W^{\pm}\to \pi^{\pm}\gamma)/\Gamma (W^{\pm}\to e^{\pm} \nu)$ at $6.4\times 10^{-5}$, a factor of 10 improvement over the previous limit.
We present a search for the rare radiative decay $W\rightarrow\pi\gamma$ using data corresponding to an integrated luminosity of 4.3 fb$^{-1}$ of proton-antiproton collisions at a center of mass energy of 1.96 TeV collected by the CDF experiment at Fermilab. As no statistically significant signal is observed, we set a 95\% confidence level upper limit on the relative branching fraction $\Gamma (W^{\pm}\to \pi^{\pm}\gamma)/\Gamma (W^{\pm}\to e^{\pm} \nu)$ at $6.4\times 10^{-5}$, a factor of 10 improvement over the previous limit.

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Запись создана 2011-04-25, последняя модификация 2014-01-30

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