Measurement of the Xi(0)->Lambda gamma decay asymmetry and branching fraction - NA48 collaboration

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, Flavio; Fantechi, R; Giudici, Sergio; Mannelli, I; Pierazzini, G; Sozzi, Marco Stanislao; 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.

doi:10.1016/j.physletb.2004.01.041

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:	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, FLAVIO Fantechi R GIUDICI, SERGIO Mannelli I Pierazzini G SOZZI, MARCO STANISLAO 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. mostra contributor esterni nascondi contributor esterni
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

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