We have searched for the C-violating decay eta --> gammagammagamma in a sample of similar to 18 million eta mesons produced in phi --> etagamma decays, collected with the KLOE detector at the Frascati phi-factory DAPhiNE. No signal is observed and we obtain the upper limit BR(eta --> gammagammagamma) less than or equal to 1.6 x 10(-5) at 90% CL. (C) 2004 Elsevier B.V. All rights reserved.
Aloisio, A., Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Bencivenni, G., et al. (2004). Upper limit on the eta ->gamma gamma gamma branching ratio with the KLOE detector. PHYSICS LETTERS. SECTION B, 591, 49-54 [10.1016/j.physletb.2004.04.012].
Upper limit on the eta ->gamma gamma gamma branching ratio with the KLOE detector
CARBONI, GIOVANNI;MESSI, ROBERTO;SANTOVETTI, EMANUELE;
2004-01-01
Abstract
We have searched for the C-violating decay eta --> gammagammagamma in a sample of similar to 18 million eta mesons produced in phi --> etagamma decays, collected with the KLOE detector at the Frascati phi-factory DAPhiNE. No signal is observed and we obtain the upper limit BR(eta --> gammagammagamma) less than or equal to 1.6 x 10(-5) at 90% CL. (C) 2004 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.