We present a search for the rare radiative decay W+ -> 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(+/-) -> pi(+/-)gamma)/Gamma(W(+/-) -> e(+/-) nu) at 6.4 x 10(-5), a factor of 10 improvement over the previous limit.

Search for the rare radiative decay W -> pi gamma in p(p)over-bar collisions at root s=1.96 TeV

CIOCCI, MARIA AGNESE;DELL'ORSO, MAURO;DONATI, SIMONE;PUNZI, GIOVANNI;F. Ruffini;
2012-01-01

Abstract

We present a search for the rare radiative decay W+ -> 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(+/-) -> pi(+/-)gamma)/Gamma(W(+/-) -> e(+/-) nu) at 6.4 x 10(-5), a factor of 10 improvement over the previous limit.
2012
T., Aaltonen; B., Álvarez González; S., Amerio; D., Amidei; A., Anastassov; A., Annovi; J., Antos; G., Apollinari; J., Appel; A., Apresyan; T., Arisaw...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828782
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 5
social impact