{"paper":{"title":"phi photo-production from Li, C, Al, and Cu nuclei at Egamma=1.5 - 2.4 GeV","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Sakaguchi, C. Rangacharyulu, C. W. Wang, D. S. Ahn, D.S. Oshuev, H. Akimune, H. Fujimura, H. Kawai, H. Kohri, H. Nakamura, H. Shimizu, H. Toyokawa, J. K. Ahn, K. Hicks, K. Imai, K. Kino, K. Miwa, M. Fujiwara, M. Miyabe, M. Morita, M. Nakamura, M. Niiyama, M. Nomachi, M. Sumihama, M. Yosoi, N. Muramatsu, R. G. T. Zegers, S. Date, T. Hotta, T. Ishikawa, T. Matsumura, T. Mibe, T. Murakami, T. Nakano, T. Ooba, T. Yorita, W. C. Chang, Y. Ohashi, Y. Sakemi, Y. Shiino, Y. Sugaya, Y. Toi","submitted_at":"2004-11-09T07:04:20Z","abstract_excerpt":"The photo-production of $\\phi$ mesons from Li, C, Al, and Cu at forward angles has been measured at $E_gamma$=1.5--2.4 GeV. The number of events for incoherent phi photo-production is found to have a target mass number dependence of $A^{0.72\\pm 0.07}$ in the kinematical region of $|t|\\le 0.6$ ${\\rm GeV}^2/c^2$. The total cross section of the $\\phi$-nucleon interaction, $\\sigma_{\\phi N}$, has been estimated as $35^{+17}_{-11}$ mb using the $A$-dependence of the $\\phi$ photo-production yield and a Glauber-type multiple scattering theory. This value is much larger than $\\sigma_{\\phi N}$ in free s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0411016","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/nucl-ex/0411016/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}