Results are given on a search for the decay W±→π±γ with the UA2 detector in pp collisions at √s=630 GeV. No signal for such a process is observed and upper limits on the ration R=Γ(W±→π±γ)/ Γ(W±→e±v)<4.9× 10-3 and on the branching ratio BR(W±→π±γ)<5. 4×10-4 are derived at 95% confidence level.
Experimental limit on the decay W+- ---> pi+- gamma at the CERN anti-p p collider / ALITTI J; AMBROSINI G; ANSARI R; AUTIERO D; BAREYRE P; BERTRAM IA; BLAYLOCK G; BONAMY P; BORER K; BOURLIAUD M; BUSKULIC D; CARBONI G; CAVALLI D; CAVASINNI V; CENCI P; CHOLLET JC; CONTA C; COSTA G; COSTANTINI F; COZZI L; CRAVERO A; CURATOLO M; DELLACQUA A; DELPRETE T; DEWOLF RS; DILELLA L; DUCROS Y; EGAN GF; EINSWEILER KF; ESPOSITO B; FAYARD L; FEDERSPIEL A; FERRARI R; FRATERNALI M; FROIDEVAUX D; FUMAGALLI G; GAILLARD JM; GIANOTTI F; GILDEMEISTER O; GOSSLING C; GOGGI VG; GRUNENDAHL S; HARA K; HELLMAN S; HRIVNAC J; HUFNAGEL H; HUGENTOBLER E; HULTQVIST K; IACOPINI E; INCANDELA J; JAKOBS K; JENNI P; KLUGE EE; KURZ N; LAMI S; LARICCIA P; LEFEBVRE M; LINSSEN L; LIVAN M; LUBRANO P; MAGNEVILLE C; MANDELLI L; MAPELLI L; MAZZANTI M; MEIER K; MERKEL B; MEYER JP; MONIEZ M; MONING R; MORGANTI M; MULLER L; MUNDAY DJ; NESSI M; NESSITEDALDI F; ONIONS C; PAL T; PARKER MA; PARROUR G; PASTORE F; PENNACCHIO E; PENTNEY JM; PEPE M; PERINI L; PETRIDOU C; PETROFF P; PLOTHOWBESCH H; POLESELLO G; POPPLETON A; PRETZL K; PRIMAVERA M; PUNTURO M; REPELLIN JP; RIMOLDI A; SACCHI M; SCAMPOLI P; SCHACHER J; SCHMIDT B; SIMAK V; SINGH SL; SONDERMANN V; SPIWOKS R; STAPNES S; TALAMONTI C; TONDINI F; TOVEY SN; TSESMELIS E; UNAL G; VALDATANAPPI M; VERCESI V; WEIDBERG AR; WELLS PS; WHITE TO; WOOD DR; WOTTON SA; ZACCONE H; ZYLBERSTEJN A. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 277:(1992), pp. 203-208. [10.1016/0370-2693(92)90980-I]
Experimental limit on the decay W+- ---> pi+- gamma at the CERN anti-p p collider
IACOPINI, ENRICO;TALAMONTI, CINZIA;
1992
Abstract
Results are given on a search for the decay W±→π±γ with the UA2 detector in pp collisions at √s=630 GeV. No signal for such a process is observed and upper limits on the ration R=Γ(W±→π±γ)/ Γ(W±→e±v)<4.9× 10-3 and on the branching ratio BR(W±→π±γ)<5. 4×10-4 are derived at 95% confidence level.
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