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Proton emission off nuclei induced by kaons in flight

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Proton emission off nuclei induced by kaons in flight

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dc.contributor.author	Magas, Volodymyr
dc.contributor.author	Yamagata-Sekihara, Junko
dc.contributor.author	Hirenzaki, Satoru
dc.contributor.author	Oset Báguena, Eulogio
dc.contributor.author	Ramos Gómez, Àngels
dc.date.accessioned	2015-08-20T11:38:41Z
dc.date.available	2015-08-20T11:38:41Z
dc.date.issued	2010
dc.identifier.citation	Magas, Volodymyr Yamagata-Sekihara, Junko Hirenzaki, Satoru Oset Báguena, Eulogio Ramos Gómez, Àngels 2010 Proton emission off nuclei induced by kaons in flight Physical Review C 81 2 024609
dc.identifier.uri	http://hdl.handle.net/10550/46720
dc.description.abstract	We study the (K-,p) reaction on nuclei with a 1 GeV/c momentum kaon beam, paying a special attention at the region of emitted protons having kinetic energy above 600 MeV, which was used to claim a deeply attractive kaon nucleus optical potential. Our model describes the nuclear reaction in the framework of a local density approach and the calculations are performed following two different procedures: one is based on a many-body method using the Lindhard function and the other one is based on a Monte Carlo simulation. While both procedures coincide when it comes to consider the contribution of kaon quasi-elastic scattering, the simulation method offers more flexibility since it allows us to account for other processes which also contribute to the proton spectra, such as K- absorption by one and two nucleons producing hyperons. The simulation also considers final state interactions in terms of multiple scattering of the K-, p and all other primary and secondary particles on their way out of the nucleus, as well as the weak decay of the produced hyperons into (pi N). We find that this kaon in-flight reaction is not well suited to determine the kaon optical potential due, essentially, to the limited sensitivity of the cross section to its strength, but also to unavoidable uncertainties in the contribution from other processes. We also simulate the experimental requirement of having, together with the energetic proton, at least one charged particle detected in the decay counter surrounding the target, and find that the shape of the original cross section is appreciably distorted. We conclude that the new mechanisms, not considered in the analysis of the original experiment, allow us to explain the observed spectrum with the shallow kaon nucleus optical potential obtained in chiral models.
dc.language.iso	eng
dc.relation.ispartof	Physical Review C, 2010, vol. 81, num. 2, p. 024609
dc.subject	Física
dc.title	Proton emission off nuclei induced by kaons in flight
dc.type	journal article	es_ES
dc.date.updated	2015-08-20T11:38:41Z
dc.identifier.doi	10.1103/PhysRevC.81.024609
dc.identifier.idgrec	061769
dc.rights.accessRights	open access	es_ES