We have searched with the KLOE detector for the P and CP violating decay eta --> pi(+)pi(-) in a sample of 1.55 x 10(7) eta's from the decay phi --> etagamma of phi-mesons produced in e(+)e(-) annihilations at DAPhiNE. No signal is found. We obtain the upper limit BR(eta --> pi(+)pi(-)) < 1.3 x 10(-5) at 90% confidence level. (C) 2004 Elsevier B.V. All rights reserved.
Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Barva, M., Beltrame, P., et al. (2005). Upper limit on the eta ->pi(+) pi(-) branching ratio with the KLOE detector. PHYSICS LETTERS. SECTION B, 606, 276-280 [10.1016/j.physletb.2004.12.025].
Upper limit on the eta ->pi(+) pi(-) branching ratio with the KLOE detector
CARBONI, GIOVANNI;MESSI, ROBERTO;SANTOVETTI, EMANUELE;
2005-01-01
Abstract
We have searched with the KLOE detector for the P and CP violating decay eta --> pi(+)pi(-) in a sample of 1.55 x 10(7) eta's from the decay phi --> etagamma of phi-mesons produced in e(+)e(-) annihilations at DAPhiNE. No signal is found. We obtain the upper limit BR(eta --> pi(+)pi(-)) < 1.3 x 10(-5) at 90% confidence level. (C) 2004 Elsevier B.V. All rights reserved.File in questo prodotto:
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