| Antiproton-Proton Annihilation At Rest Into (2007) | |||||||||||||
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| The annihilation channel pp!K + K \Gamma 0 in liquid hydrogen at rest has been studied with the Crystal Barrel detector at LEAR. The measured branching ratio is: BR(pp!K + K \Gamma 0 ) = (2:37 \Sigma 0:15)\Theta10 \Gamma3 . A partial wave analysis shows that this reaction is dominated by the (K K) S , KK (892) and OE(1020) intermediate states. Weak signals are observed for a 2 (1320), f 2 (1270), f 0 2 (1525) and K(K) S . A satisfactory description of the Dalitz plot requires the introduction of (K K)P intermediate states with at least one pole. The work described in the present letter continues our systematic study of channels where p annihilates in liquid hydrogen at rest into a 3-body final state containing a K K pair. In three previous publications [1--3], we have reported on investigations of the channels pp !K L K S 0 (1) pp !K L K L 0 (2) pp !K L K \Sigma \Upsilon (3) The first two reactions are complementary in that they select opposite C- ... | |||||||||||||
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