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Title: Absorption of the {omega} and {phi} Mesons in Nuclei

Journal Article · · Physical Review Letters
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  1. Canisius College, Buffalo, New York 14208 (United States)
  2. The George Washington University, Washington, D.C. 20052 (United States)
  3. University of South Carolina, Columbia, South Carolina 29208 (United States)
  4. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)

Because of their long lifetimes, the {omega} and {phi} mesons are the ideal candidates for the study of possible modifications of the in-medium meson-nucleon interaction through their absorption inside the nucleus. During the E01-112 experiment at the Thomas Jefferson National Accelerator Facility, the mesons were photoproduced from {sup 2}H, C, Ti, Fe, and Pb targets. This Letter reports the first measurement of the ratio of nuclear transparencies for the e{sup +}e{sup -} channel. The ratios indicate larger in-medium widths compared with what have been reported in other reaction channels. The absorption of the {omega} meson is stronger than that reported by the CBELSA-TAPS experiment and cannot be explained by recent theoretical models.

OSTI ID:
21471007
Journal Information:
Physical Review Letters, Vol. 105, Issue 11; Other Information: DOI: 10.1103/PhysRevLett.105.112301; (c) 2010 American Institute of Physics; ISSN 0031-9007
Country of Publication:
United States
Language:
English