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

Abstract : We present a search for the rare radiative decay \wpigamma\ using data corresponding to an integrated luminosity of 4.3 \invfb\ 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 \bratio\ at $6.4\times 10^{-5}$, a factor of 10 improvement over the previous limit.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00587056
Contributor : Swarna Bassava <>
Submitted on : Tuesday, April 19, 2011 - 11:56:06 AM
Last modification on : Monday, December 14, 2020 - 9:44:24 AM

### Citation

T. Aaltonen, B. Alvarez Gonzalezv, S. Amerio, D. Amidei, A. Anastassov, et al.. Search for the Rare Radiative Decay: $W\rightarrow\pi\gamma$ in \ppbar\ Collisions at $\sqrt{s} = 1.96$ TeV. Physical Review D, American Physical Society, 2012, 85, pp.032001. ⟨10.1103/PhysRevD.85.032001⟩. ⟨in2p3-00587056⟩

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