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Coherent two pion photoproduction on C-12
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| dc.contributor.author | Kamalov, Sabit S. | |
| dc.contributor.author | Oset Báguena, Eulogio | |
| dc.date.accessioned | 2015-09-04T10:54:37Z | |
| dc.date.available | 2015-09-04T10:54:37Z | |
| dc.date.issued | 1997 | |
| dc.identifier.citation | Kamalov, Sabit S. Oset Báguena, Eulogio 1997 Coherent two pion photoproduction on C-12 Nuclear Physics A 625 4 873 892 | |
| dc.identifier.uri | http://hdl.handle.net/10550/46861 | |
| dc.description.abstract | We develop the formalism for coherent two pion photoproduction in nuclei and perform actual calculations of cross sections for π−π+ and π0π0 photoproduction on 12C. We find that due to the isospin symmetry the cross section for π0π0 production is very small and has a maximum when the pions propagate together. However, the kinematical region where the energies and polar angles of the two π0 mesons are equal and their relative azimuthal angle ϕ=1800 is forbidden. Conversely in the π−π+ production the pions prefer to have a relative azimuthal angle 1800 and the production of the pions propagating together is suppressed. The dominant one-body mechanism in both channels is related to the excitation of the Δ isobar. Hence the reaction can serve as a source of information about Δ's properties in nucleus. We have found that the reaction is sensitive to effects of the pion and Δ renormalization in the nuclear medium, similar to those found in the coherent (γ,π0) reaction, but magnified because of the presence of the two pions. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Nuclear Physics A, 1997, vol. 625, num. 4, p. 873-892 | |
| dc.subject | Física | |
| dc.title | Coherent two pion photoproduction on C-12 | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2015-09-04T10:54:38Z | |
| dc.identifier.doi | 10.1016/S0375-9474(97)00372-2 | |
| dc.identifier.idgrec | 079444 | |
| dc.rights.accessRights | open access | es_ES |
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