Incoherent photoproduction of pseudoscalar mesons off nuclei at forward angles
- JINR
- North Carolina Ag. and Tech. St. U
- University of North Carolina at Wilmington
- ITEP, Moscow
- Idaho State U
Recent advances in the photon tagging facilities together with the novel, high-resolution fast calorimetry make it possible to perform photoproduction cross section measurements of pseudoscalar mesons on nuclei with a percent level accuracy. The extraction of the radiative decay widths, needed for testing the symmetry breaking effects in QCD, from these measurements at small angles is done by the Primakoff method. This method requires theoretical treatment of all processes participating in these reactions at the same percent level. The most updated description of general processes, including the nuclear coherent amplitude, is done in our previous paper. In this work, in the framework of the Glauber multiple scattering theory, we obtain analytical expressions for the incoherent cross section of the photoproduction of pseudoscalar mesons off nuclei accounting for the mesons absorption in nuclei and the Pauli suppression at forward production angles. As illustrations of the obtained formulas, we calculate the incoherent cross section for photoproduction from a closed shell nucleus, {sup 16}O, and from an unclosed shell nucleus, {sup 12}C. These calculations allow one to compare different approaches and estimate their impact on the incoherent cross section of the processes under consideration.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1108692
- Report Number(s):
- JLAB-PHY-12-1703; DOE/OR/23177-3750; NSF Grant PHY-0245407; NSF Grant PHY-0555524
- Journal Information:
- Physics of Particles and Nuclei Letters, Vol. 9, Issue 1; ISSN 1547-4771
- Country of Publication:
- United States
- Language:
- English
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