ϕ photo-production from Li, C, Al, and Cu nuclei at Eγ = 1.5- 2.4GeV
Abstract
The photo-production of ϕ mesons from Li, C, Al, and Cu at forward angles has been measured at Eγ = 1.5- 2.4GeV. The number of events for incoherent ϕ photo-production is found to have a target mass number dependence of A 0.72 ± 0.07 in the kinematical region of | t | ⩽ 0.6GeV2 /c2. The total cross section of the ϕ-nucleon interaction, σϕN, has been estimated as 35-11+17mb using the A-dependence of the ϕ photo-production yield and a Glauber-type multiple scattering theory. This value is much larger than σϕN in free space, suggesting that the ϕ properties might change in the nuclear medium.
- Publication:
-
Physics Letters B
- Pub Date:
- February 2005
- DOI:
- 10.1016/j.physletb.2005.01.023
- arXiv:
- arXiv:nucl-ex/0411016
- Bibcode:
- 2005PhLB..608..215I
- Keywords:
-
- 13.25.-k;
- 13.75.-n;
- 14.40.Cs;
- Hadronic decays of mesons;
- Hadron-induced low- and intermediate-energy reactions and scattering;
- Other mesons with S=C=0 mass<
- 2.5 GeV;
- Nuclear Experiment
- E-Print:
- 12 pages 4 figures, submitted to Phys. Lett. B