In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Xi(0) --> Lambdagamma have been found with an estimated background of 58 +/- 8 events. From these events the Xi(0) --> Lambdagamma decay asymmetry has been determined to alpha(Xi(0) --> Lambdagamma) = -0.78 +/- 0.18(stat) +/- 0.06(syst), which is the first evidence of a decay asymmetry in Xi(0) --> Lambdagamma. The branching fraction of the decay has been measured to be Br(Xi(0) --> Lambdagamma) = (1.16 +/- 0.05(stat) +/- 0.06(syst)) x 10(-3). (C) 2004 Elsevier B.V. All rights reserved.
Autori interni: | |
Autori: | Lai A; Marras D; Bevan A; Dosanjh RS; Gershon TJ; Hay B; Kalmus GE; Lazzeroni C; Munday DJ; Olaiya E; Parker MA; White TO; Wotton SA; Barr G; Bocquet G; Ceccucci A; Cuhadar-Donszelmann T; Cundy D; D'Agostini G; Doble N; Falaleev V; Gatignon L; Gonidec A; Gorini B; Govi G; Grafstrom P; Kubischta W; Lacourt A; Norton A; Palestini S; Panzer-Steindel B; Taureg H; Velasco M; Wahl H; Cheshkov C; Gaponenko A; Hristov P; Kekelidze V; Madigojine D; Molokanova N; Potrebenikov Y; Tatishvili G; Tkatchev A; Zinchenko A; Knowles I; Martin V; Sacco R; Walker A; Contalbrigo M; Dalpiaz P; Duclos J; Frabetti R; Gianoli A; Martini M; Petrucci F; Savrie M; Bizzeti A; Calvetti M; Collazuol G; Graziani G; Iacopini E; Lenti M; Martelli F; Veltri M; Becker HG; Eppard K; Eppard M; Fox H; Kalter A; Kleinknecht K; Koch U; Kopke L; da Silva PL; Marouelli P; Pellmann I; Peters A; Renk B; Schmidt SA; Schonharting V; Schue Y; Wanke R; Winhart A; Wittgen M; Chollet JC; Fayard L; Iconomidou-Fayard L; Ocariz J; Unal G; Wingerter-Seez I; Anzivino G; Cenci P; Imbergamo E; Lubrano P; Mestvirishvili A; Nappi A; Pepe M; Piccini M; Bertanza L; Carosi R; Casali R; Cerri C; Cirilli M; Costantini F; Fantechi R; Giudici S; Mannelli I; Pierazzini G; Sozzi M; Cheze JB; Cogan J; De Beer M; Debu P; Formica A; de Cassagnac RG; Mazzucato E; Peyaud B; Turlay R; Vallage B; Holder M; Maier A; Ziolkowski M; Arcidiacono R; Biino C; Cartiglia N; Guida R; Marchetto F; Menichetti E; Pastrone N; Nassalski J; Rondio E; Szleper M; Wislicki W; Wronka S; Dibon H; Fischer G; Jeitler M; Markytan M; Mikulec I; Neuhofer G; Pernicka M; Taurok A; Widhalm L |
Titolo: | Measurement of the Xi(0)->Lambda gamma decay asymmetry and branching fraction - NA48 collaboration |
Anno del prodotto: | 2004 |
Digital Object Identifier (DOI): | 10.1016/j.physletb.2004.01.041 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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.