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The (pi(-), gamma gamma) reaction in nuclei and the sigma meson in the medium

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dc.contributor.author	Roca Zamora, Luis
dc.contributor.author	Oset Báguena, Eulogio
dc.date.accessioned	2015-09-08T09:53:07Z
dc.date.available	2015-09-08T09:53:07Z
dc.date.issued	2003
dc.identifier.citation	Roca Zamora, Luis Oset Báguena, Eulogio 2003 The (pi(-), gamma gamma) reaction in nuclei and the sigma meson in the medium Nuclear Physics A 723 1-2 129 144
dc.identifier.uri	http://hdl.handle.net/10550/46955
dc.description.abstract	A theoretical analysis of the (π−,γγ) reaction in nuclei is made in order to find the viability of this reaction to test modifications of the σ meson mass in nuclear matter. The ππ correlation in the scalar-isoscalar channel in nuclear matter could, in principle, manifest itself in this reaction since it plays an important role in the ππ→γγ mechanism. But we conclude that this effect is hardly visible in this reaction due to the strong background of the pion-Bremsstrahlung terms. Only with some special cuts and for some polarization states are the effect visible at the cost of a strong reduction in the cross section.
dc.language.iso	eng
dc.relation.ispartof	Nuclear Physics A, 2003, vol. 723, num. 1-2, p. 129-144
dc.subject	Física
dc.title	The (pi(-), gamma gamma) reaction in nuclei and the sigma meson in the medium
dc.type	journal article	es_ES
dc.date.updated	2015-09-08T09:53:07Z
dc.identifier.doi	10.1016/S0375-9474(03)01090-X
dc.identifier.idgrec	008206
dc.rights.accessRights	open access	es_ES