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Short range correlations in the pion s-wave self-energy of pionic atoms

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Short range correlations in the pion s-wave self-energy of pionic atoms

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dc.contributor.author Salcedo, Lorenzo Luis
dc.contributor.author Holinde, Karl
dc.contributor.author Oset Báguena, Eulogio
dc.contributor.author Schütz, C.
dc.date.accessioned 2015-09-08T11:02:32Z
dc.date.available 2015-09-08T11:02:32Z
dc.date.issued 1995
dc.identifier.citation Salcedo, Lorenzo Luis Holinde, Karl Oset Báguena, Eulogio Schütz, C. 1995 Short range correlations in the pion s-wave self-energy of pionic atoms Physics Letters B 353 1 1 6
dc.identifier.uri http://hdl.handle.net/10550/47022
dc.description.abstract We evaluate the contribution of second order terms to the pion-nucleus s-wave optical potential of pionic atoms generated by short range nuclear correlation. The corrections are sizeable because they involve the isoscalar s-wave πN amplitude for half off-shell situations where the amplitude is considerably larger than the on-shell one. In addition, the s-wave optical potential is reanalyzed by looking at all the different conventional contributions together lowest order, Pauli corrected rescattering term, second order absorptive effects, terms from the interaction of pions with the virtual pion cloud (chiral corrections) and correlation effects. Different off-shell extrapolations for the πN amplitude are used and it is found that, although some individual terms are sensitive to the extrapolation, the sum of them is rather insensitive. The results are compared with empirical values from best fits to the data and are found to be compatible, within theoretical and empirical uncertainties. The results do not rule out further contributions but they put stringent constraints on their strength.
dc.language.iso eng
dc.relation.ispartof Physics Letters B, 1995, vol. 353, num. 1, p. 1-6
dc.subject Física
dc.title Short range correlations in the pion s-wave self-energy of pionic atoms
dc.type journal article es_ES
dc.date.updated 2015-09-08T11:02:32Z
dc.identifier.doi 10.1016/0370-2693(95)00524-O
dc.identifier.idgrec 079582
dc.rights.accessRights open access es_ES

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