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On the ambiguities of sign determination of the S-matrix from energy levels in a finite box

Repositori DSpace/Manakin

dc.contributor.author	Oset Báguena, Eulogio
dc.date.accessioned	2014-02-17T13:47:05Z
dc.date.available	2014-02-17T13:47:05Z
dc.date.issued	2013
dc.identifier.citation	Oset Báguena, Eulogio 2013 On the ambiguities of sign determination of the S-matrix from energy levels in a finite box European Physical Journal A 49 3 32
dc.identifier.uri	http://hdl.handle.net/10550/32998
dc.description.abstract	In a recent paper the authors make a study on the determination of the S-matrix elements for scattering of particles in the infinite volume from the energy levels in a finite box for the case of multiple channels. The study is done with a toy model in 1+1 dimension and the authors find that there is some ambiguity in the sign of nondiagonal matrix elements, casting doubts on whether the needed observables in the infinite volume can be obtained from the energy levels of the box. In this paper I present an easy derivation, confirming the ambiguity of the sign and argue that this, however, does not put restrictions in the determination of observables.
dc.relation.ispartof	European Physical Journal A, 2013, vol. 49, num. 3, p. 32
dc.subject	Física
dc.title	On the ambiguities of sign determination of the S-matrix from energy levels in a finite box
dc.type	journal article	es_ES
dc.date.updated	2014-02-17T13:47:05Z
dc.identifier.doi	10.1140/epja/i2013-13032-9
dc.identifier.idgrec	089436
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1140/epja/i2013-13032-9