Q0- overlineQ0 production in K L0p interactions up to 17 GeV/ c
Abstract
The construction of a K L0 beam for the CERN 2 m hydrogen bubble chamber and the derivation of the beam momentum spectrum are described. Cross sections are presented for the reaction K L0+p → K S0+ π++ π-+p for KL0 momenta up to 17 GeV/ c. The reacti is seen to be dominated, particularly at the highest momenta, where there are no previous data, by the production of the Q0- overlineQ0 system. The shapes of the t-distributions for Q0andoverlineQ0 prodcution are found to be different in a sense opposite to that expected from the pion-exchange Deck model. A model in which the observed effect is ascribed to the addition of a K ∗ exchange Deck graph is found to be incompatible with the data. The data are, however, consistent with a model in which the Q0- overlineQ0 system is largely resonant and the sense of the cross-over is determined by the s-channel quantum numbers.
- Publication:
-
Nuclear Physics B
- Pub Date:
- January 1980
- DOI:
- 10.1016/0550-3213(80)90259-X
- Bibcode:
- 1980NuPhB.162..189B