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.
Upper limit on the eta -> pi+ pi– branching ratio with the KLOE detector
GORINI, Edoardo;PRIMAVERA, Margherita;VENTURA, Andrea;
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.File in questo prodotto:
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