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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)
Nuclear physics
Constitution of matter
Mesons (Nuclear physics)
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:
It is part of: Physics Letters B, 2012, vol. 710, num. 4-5, p. 600-606
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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