Search for the rare radiative decay W→πγ in pp¯ collisions at s=1.96TeV
Abstract
We present a search for the rare radiative decay W±→π±γ using data corresponding to an integrated luminosity of 4.3fb-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 Γ(W±→π±γ)/Γ(W±→e±ν) at 6.4×10-5, a factor of 10 improvement over the previous limit.
- Publication:
-
Physical Review D
- Pub Date:
- February 2012
- DOI:
- 10.1103/PhysRevD.85.032001
- arXiv:
- arXiv:1104.1585
- Bibcode:
- 2012PhRvD..85c2001A
- Keywords:
-
- 14.70.Fm;
- 12.15.Ji;
- 13.38.Be;
- W bosons;
- Applications of electroweak models to specific processes;
- Decays of W bosons;
- High Energy Physics - Experiment
- E-Print:
- doi:10.1103/PhysRevD.85.032001