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http://hdl.handle.net/2445/44088
Title: | Transparency ratio in γ A -> η' A ' and the in-medium η ' width |
Author: | Ramos Gómez, Àngels Oset Baguena, Eulogio |
Keywords: | Física nuclear Constitució de la matèria Mesons (Física nuclear) Hadrons Fotons Nuclear physics Constitution of matter Mesons (Nuclear physics) Hadrons Photons |
Issue Date: | 2012 |
Publisher: | Elsevier B.V. |
Abstract: | The photoproduction of η′η′-mesons off different nuclei has been measured with the CBELSA/TAPS detector system for incident photon energies between 1500-2200 MeV. The transparency ratio has been deduced and compared to theoretical calculations describing the propagation of η′η′-mesons in nuclei. The comparison indicates a width of the η′η′-meson of the order of Γ=15-25 MeVΓ=15-25 MeV at ρ=ρ0ρ=ρ0 for an average momentum pη′=1050 MeV/cpη′=1050 MeV/c, at which the η′η′-meson is produced in the nuclear rest frame. The inelastic η′Nη′N cross section is estimated to be 3-10 mb. Parameterizing the photoproduction cross section of η′η′-mesons by σ(A)=σ0Aασ(A)=σ0Aα, a value of α=0.84±0.03α=0.84±0.03 has been deduced. |
Note: | Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.physletb.2012.03.039 |
It is part of: | Physics Letters B, 2012, vol. 710, num. 4-5, p. 600-606 |
URI: | http://hdl.handle.net/2445/44088 |
Related resource: | http://dx.doi.org/10.1016/j.physletb.2012.03.039 |
ISSN: | 0370-2693 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Publicacions de projectes de recerca finançats per la UE |
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