Measurement of the Ξ0 → Λγ decay asymmetry and branching fraction
- 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-Dönszelmann, T
- Cundy, D
- D'Agostini, G
- Doble, N
- Falaleev, V
- Gatignon, L
- Gonidec, A
- Gorini, B
- Govi, G
- Grafström, 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, PL
- Gianoli, A
- Martini, M
- Petrucci, F
- Savrié, 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
- Köpke, L
- Lopes da Silva, P
- Marouelli, P
- Pellmann, I
- Peters, A
- Renk, B
- Schmidt, SA
- Schönharting, V
- Schué, 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
- Granier de Cassagnac, R
- 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
Publication date
April 2004
DOI Publisher
Elsevier BV Journal
Physics Letters BAbstract
In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Ξ0→Λγ have been found with an estimated background of 58±8 events. From these events the Ξ0→Λγ decay asymmetry has been determined to α(Ξ0→Λγ)=-0.78±0.18stat±0.06 syst, which is the first evidence of a decay asymmetry in Ξ 0→Λγ. The branching fraction of the decay has been measured to be Br(Ξ0→Λγ)=(1.16±0.05 stat±0.06syst)×10-3. © 2004 Elsevier B.V. All rights reserved
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