The photo-production of φ mesons from Li, C, Al, and Cu at forward angles has been measured at Eγ = 1.5-2.4 GeV. The number of events for incoherent φ photo-production is found to have a target mass number dependence of A0.72±0.07 in the kinematical region of |t| ≤ 0.6 GeV2/c2. The total cross section of the φ-nucleon interaction, σφN, has been estimated as 35 -11 +17 mb 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.
|Number of pages||8|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2005 Feb 24|
ASJC Scopus subject areas
- Nuclear and High Energy Physics