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DC Field | Value | Language |
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dc.contributor.author | Barbero, C. | - |
dc.contributor.author | Galeao, A. P. | - |
dc.contributor.author | Krmpotic, F. | - |
dc.date.accessioned | 2014-05-20T15:22:51Z | - |
dc.date.accessioned | 2016-10-25T17:56:39Z | - |
dc.date.available | 2014-05-20T15:22:51Z | - |
dc.date.available | 2016-10-25T17:56:39Z | - |
dc.date.issued | 2005-09-01 | - |
dc.identifier | http://dx.doi.org/10.1103/PhysRevC.72.035210 | - |
dc.identifier.citation | Physical Review C. College Pk: American Physical Soc, v. 72, n. 3, 11 p., 2005. | - |
dc.identifier.issn | 0556-2813 | - |
dc.identifier.uri | http://hdl.handle.net/11449/33762 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/33762 | - |
dc.description.abstract | We give general expressions for the vector asymmetry in the angular distribution of protons in the nonmesonic weak decay of polarized hypernuclei. From these we derive an explicit expression for the calculation of the asymmetry parameter, a(Lambda), which is applicable to the specific cases of He-5(Lambda) and C-12(Lambda) described within the extreme shell model. In contrast to the approximate formula widely used in the literature, it includes the effects of three-body kinematics in the final states of the decay and correctly treats the contribution of transitions originating from single-proton states beyond the s-shell. This expression is then used for the corresponding numerical computation of a(Lambda) within several one-meson-exchange models. Besides the strictly local approximation usually adopted for the transition potential, we also consider the addition of the first-order nonlocality terms. We find values for a(Lambda) ranging from -0.62 to -0.24, in qualitative agreement with other theoretical estimates but in contradiction with some recent experimental determinations. | en |
dc.format.extent | 11 | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Soc | - |
dc.source | Web of Science | - |
dc.title | Asymmetry parameter for nonmesonic hypernuclear decay | en |
dc.type | outro | - |
dc.contributor.institution | Univ Nacl La Plata | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | Universidade de São Paulo (USP) | - |
dc.contributor.institution | Consejo Nacl Invest Cient & Tecn | - |
dc.description.affiliation | Univ Nacl La Plata, Fac Ciências Exactas, Dept Fis, RA-1900 La Plata, Argentina | - |
dc.description.affiliation | Univ Estadual Paulista, Inst Fis Theor, BR-01405900 São Paulo, SP, Brazil | - |
dc.description.affiliation | Univ São Paulo, Inst Fis, BR-05315970 São Paulo, SP, Brazil | - |
dc.description.affiliation | Consejo Nacl Invest Cient & Tecn, Inst Fis La Plata, RA-1900 La Plata, Argentina | - |
dc.description.affiliation | Univ Nacl La Plata, Fac Ciências Astron & Geofis, RA-1900 La Plata, Argentina | - |
dc.description.affiliationUnesp | Univ Estadual Paulista, Inst Fis Theor, BR-01405900 São Paulo, SP, Brazil | - |
dc.identifier.doi | 10.1103/PhysRevC.72.035210 | - |
dc.identifier.wos | WOS:000232229900060 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.identifier.file | WOS000232229900060.pdf | - |
dc.relation.ispartof | Physical Review C | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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