| Antiproton-Proton Annihilation At Rest Into (2007) | |||||||||||||
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| The annihilation channel ¯ pp ! K L K S ß 0 ß 0 was studied with the Crystal Barrel detector at LEAR. This final state with negative C-parity is dominated by the strange resonances K (892), K 1 (1270), K 1 (1400) and K 0 (1430). In addition, a J PC = 1 +\Gamma state is seen in the K K decay mode. This state could be the isoscalar, axialvector h 0 1 seen here with a mass of m = (1440 \Sigma 60) MeV=c 2 and a width of \Gamma = (170 \Sigma 80) MeV=c 2 . This is the first experimental study and partial wave analysis of the K L K S ß 0 ß 0 final state produced in ¯ pp annihilation at rest. The same final state has previously been indirectly identified in the reaction ¯ pp!K S M by Astier et al. [1], where M represents the missing neutral particle system K L ß 0 ß 0 . With three missing particles, no partial wave analysis could be performed. However, an amplitude analysis of the related reaction ¯ pp!K S K S ß + ß \Gamma was possible and was found to be ... | |||||||||||||
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