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eta '-Nucleus optical potential and possible eta ' bound states
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eta '-Nucleus optical potential and possible eta ' bound states
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| dc.contributor.author | Nagahiro, Hideko | |
| dc.contributor.author | Hirenzaki, Satoru | |
| dc.contributor.author | Oset Báguena, Eulogio | |
| dc.contributor.author | Ramos Gómez, Àngels | |
| dc.date.accessioned | 2015-08-20T11:53:13Z | |
| dc.date.available | 2015-08-20T11:53:13Z | |
| dc.date.issued | 2012 | |
| dc.identifier.citation | Nagahiro, Hideko Hirenzaki, Satoru Oset Báguena, Eulogio Ramos Gómez, Àngels 2012 eta '-Nucleus optical potential and possible eta ' bound states Physics Letters B 709 1-2 87 92 | |
| dc.identifier.uri | http://hdl.handle.net/10550/46724 | |
| dc.description.abstract | Starting from a recent model of the eta'N interaction, we evaluate the eta'-nucleus optical potential, including the contribution of lowest order in density, t rho/2m(eta'), together with the second-order terms accounting for eta' absorption by two nucleons. We also calculate the formation cross section of the eta' bound states from (pi(+), p) reactions on nuclei. The eta'-nucleus potential suffers from uncertainties tied to the poorly known eta'N interaction, which can be partially constrained by the experimental modulus of the eta'N scattering length and/or the recently measured transparency ratios in eta' nuclear photoproduction. Assuming an attractive interaction and taking the claimed experimental value vertical bar a(eta'N)vertical bar = 0.1 fm, we obtain an eta' optical potential in nuclear matter at saturation density of V eta' = -(8.7 + 1.8i) MeV, not attractive enough to produce eta' bound states in light nuclei. Larger values of the scattering length give rise to deeper optical potentials, with moderate enough imaginary parts. For a value vertical bar a(eta'N)vertical bar = 0.3 fm, which can still be considered to lie within the uncertainties of the experimental constraints, the spectra of light and medium nuclei show clear structures associated to eta'-nuclear bound states and to threshold enhancements in the unbound region. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Physics Letters B, 2012, vol. 709, num. 1-2, p. 87-92 | |
| dc.subject | Física | |
| dc.title | eta '-Nucleus optical potential and possible eta ' bound states | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2015-08-20T11:53:13Z | |
| dc.identifier.doi | 10.1016/j.physletb.2012.01.061 | |
| dc.identifier.idgrec | 080190 | |
| dc.rights.accessRights | open access | es_ES |
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