First observation of the K-S -> pi(0)gamma gamma decay

Lai, A; Marras, D; Batley, Jr; Dosanjh, Rs; Gershon, Tj; Kalmus, Ge; Lazzeroni, C; Munday, Dj; Olaiya, E; Parker, Ma; White, To; Wotton, Sa; Arcidiacono, R; Barr, G; Bocquet, G; Ceccucci, A; Cuhadar Donszelmann, T; Cundy, D; Doble, N; Falaleev, V; Gatignon, L; Gonidec, A; Gorini, B; Grafstrom, P; Kubischta, W; Lacourt, A; Norton, A; Panzer Steindel, B; Tatishvili, G; Wahl, H; Cheshkov, C; Hristov, P; Kekelidze, V; Madigojine, D; Molokanova, N; Potrebenikov, Y; Zinchenko, A; Martin, V; Rubin, P; Sacco, R; Walker, A; Contalbrigo, M; Dalpiaz, P; Duclos, J; Frabetti, Pl; Gianoli, A; Martini, M; Petrucci, F; Savrie, M; Bizzeti, A; Calvetti, M; Collazuol, G; Graziani, G; Iacopini, E; Lenti, M; Martelli, F; Veltri, M; Eppard, M; Hirstius, A; Holtz, K; Kleinknecht, K; Koch, U; Kopke, L; da Silva PL,; Marouelli, P; Mestvirishvili, I; Pellmann, I; Peters, A; Schmidt, Sa; Schonharting, V; Schue, Y; Wanke, R; Winhart, A; Wittgen, M; Chollet, Jc; Fayard, L; Iconomidou Fayard, L; Unal, G; Wingerter Seez, I; Anzivino, G; Cenci, P; Imbergamo, E; Lubrano, P; Mestvirishvili, A; Nappi, A; Pepe, M; Piccini, M; Casali, R; Cerri, C; Cirilli, M; Costantini, Flavio; Fantechi, R; Fiorini, L; Giudici, Sergio; Mannelli, I; Pierazzini, G; Sozzi, Marco Stanislao; Cheze, Jb; De Beer, M; Debu, P; Derue, F; Formica, A; de Cassagnac RG,; Gouge, G; Marel, G; Mazzucato, E; Peyaud, B; Turlay, R; Vallage, B; Holder, M; Maier, A; Ziolkowski, M; Biino, C; Cartiglia, N; Marchetto, F; Menichetti, E; Pastrone, N; Nassalski, J; Rondio, E; Szleper, M; Wislicki, W; Wronka, S; Dibon, H; Jeitler, M; Markytan, M; Mikulec, I; Neuhofer, G; Pernicka, M; Taurok, A; Widhalm, L.

doi:10.1016/j.physletb.2003.10.073

Using the NA48 detector at the CERN SPS, 31 K-S --> pi(0)gammagamma candidates with an estimated background of 13.7 +/- 3.2 events have been observed. This first observation leads to a branching ratio of BR(K-S --> pi(0)gammagamma)(z>0.2) = (4.9 +/- 1.6(stat) +/- 0.9(syst)) x 10(-8) in agreement with Chiral Perturbation Theory predictions. (C) 2003 Elsevier B.V. All rights reserved.

Autori interni:	Lai A Marras D Batley JR Dosanjh RS Gershon TJ Kalmus GE Lazzeroni C Munday DJ Olaiya E Parker MA White TO Wotton SA Arcidiacono R Barr G Bocquet G Ceccucci A Cuhadar Donszelmann T Cundy D Doble N Falaleev V Gatignon L Gonidec A Gorini B Grafstrom P Kubischta W Lacourt A Norton A Panzer Steindel B Tatishvili G Wahl H Cheshkov C Hristov P Kekelidze V Madigojine D Molokanova N Potrebenikov Y Zinchenko A Martin V Rubin P Sacco R Walker A Contalbrigo M Dalpiaz P Duclos J Frabetti PL Gianoli A Martini M Petrucci F Savrie M Bizzeti A Calvetti M Collazuol G Graziani G Iacopini E Lenti M Martelli F Veltri M Eppard M Hirstius A Holtz K Kleinknecht K Koch U Kopke L da Silva PL Marouelli P Mestvirishvili I Pellmann I Peters A Schmidt SA Schonharting V Schue Y Wanke R Winhart A Wittgen M Chollet JC Fayard L Iconomidou Fayard L Unal G Wingerter Seez I Anzivino G Cenci P Imbergamo E Lubrano P Mestvirishvili A Nappi A Pepe M Piccini M Casali R Cerri C Cirilli M COSTANTINI, FLAVIO Fantechi R Fiorini L GIUDICI, SERGIO Mannelli I Pierazzini G SOZZI, MARCO STANISLAO Cheze JB De Beer M Debu P Derue F Formica A de Cassagnac RG Gouge G Marel G Mazzucato E Peyaud B Turlay R Vallage B Holder M Maier A Ziolkowski M Biino C Cartiglia N Marchetto F Menichetti E Pastrone N Nassalski J Rondio E Szleper M Wislicki W Wronka S Dibon H 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; Batley JR; Dosanjh RS; Gershon TJ; Kalmus GE; Lazzeroni C; Munday DJ; Olaiya E; Parker MA; White TO; Wotton SA; Arcidiacono R; Barr G; Bocquet G; Ceccucci A; Cuhadar-Donszelmann T; Cundy D; Doble N; Falaleev V; Gatignon L; Gonidec A; Gorini B; Grafstrom P; Kubischta W; Lacourt A; Norton A; Panzer-Steindel B; Tatishvili G; Wahl H; Cheshkov C; Hristov P; Kekelidze V; Madigojine D; Molokanova N; Potrebenikov Y; Zinchenko A; Martin V; Rubin P; Sacco R; Walker A; Contalbrigo M; Dalpiaz P; Duclos J; Frabetti PL; Gianoli A; Martini M; Petrucci F; Savrie M; Bizzeti A; Calvetti M; Collazuol G; Graziani G; Iacopini E; Lenti M; Martelli F; Veltri M; Eppard M; Hirstius A; Holtz K; Kleinknecht K; Koch U; Kopke L; da Silva PL; Marouelli P; Mestvirishvili I; Pellmann I; Peters A; Schmidt SA; Schonharting V; Schue Y; Wanke R; Winhart A; Wittgen M; Chollet JC; Fayard L; Iconomidou-Fayard L; Unal G; Wingerter-Seez I; Anzivino G; Cenci P; Imbergamo E; Lubrano P; Mestvirishvili A; Nappi A; Pepe M; Piccini M; Casali R; Cerri C; Cirilli M; Costantini F; Fantechi R; Fiorini L; Giudici S; Mannelli I; Pierazzini G; Sozzi M; Cheze JB; De Beer M; Debu P; Derue F; Formica A; de Cassagnac RG; Gouge G; Marel G; Mazzucato E; Peyaud B; Turlay R; Vallage B; Holder M; Maier A; Ziolkowski M; Biino C; Cartiglia N; Marchetto F; Menichetti E; Pastrone N; Nassalski J; Rondio E; Szleper M; Wislicki W; Wronka S; Dibon H; Jeitler M; Markytan M; Mikulec I; Neuhofer G; Pernicka M; Taurok A; Widhalm L
Titolo:	First observation of the K-S -> pi(0)gamma gamma decay
Anno del prodotto:	2004
Digital Object Identifier (DOI):	10.1016/j.physletb.2003.10.073
Appare nelle tipologie:	1.1 Articolo in rivista

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