E04-021 CLAS experiment
- Spokespersons
- M. Battaglieri, R. De Vita, V. Kubarovsky
- Year
- 2004
- Abstract
- Photoproduction of the Xi-(1320) in the reaction of gamma p --> K+ K+ (X) has been investigated using the new large statistics CLAS data. The two positive kaons are detected in CLAS, and the Xi- is identified from the missing mass. The differential and total cross sections for the Xi-(1320) have been determined for the photon beam energy from 2.75 GeV to 4.75 GeV, consistent with a possible production mechanism of Y*--> K+Xi- through t-channel process. The reaction of gamma p --> K+ K+ pi-Xi0 has also been investigated in search of excited cascade resonances. No substantial signal of excited cascade states other than the Xi-(1530) is observed. The cross section results of the Xi-(1530) have also been obtained.
- Quantities
- σ dσ/dcos(θΞ(1320)−) dσ/dcos(θK+) dσ/dM(K+ K+) dσ/dM(Ξ− K+)
Measurements
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| ID | Quantity | Beam | Target | Final state |
Q2min, GeV2 |
Q2max, GeV2 |
Wmin, GeV |
Wmax, GeV |
|---|---|---|---|---|---|---|---|---|
| E22M1 | σ | γ | p | K+ K+ Ξ(1320)− | 0.0 | 0.0 | None | None |
| E22M2 | dσ/dcos(θΞ(1320)−) | γ | p | K+ K+ Ξ(1320)− | 0.0 | 0.0 | None | None |
| E22M3 | dσ/dcos(θK+) | γ | p | K+ K+ Ξ(1320)− | 0.0 | 0.0 | None | None |
| E22M4 | dσ/dM(K+ K+) | γ | p | K+ K+ Ξ(1320)− | 0.0 | 0.0 | None | None |
| E22M5 | dσ/dM(Ξ− K+) | γ | p | K+ K+ Ξ(1320)− | 0.0 | 0.0 | None | None |
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