dorsal/arxiv
View SchemaDirect Quark Mechanism for Weak $\Lam N \leftrightarrow NN$ Processes
| Authors | Makoto Oka |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9801026 |
| URL | https://arxiv.org/abs/nucl-th/9801026 |
| DOI | 10.1016/S0375-9474(98)00289-9 |
| Journal | Nucl.Phys. A639 (1998) 317c-324c |
Abstract
Two body weak processes $\Lambda N \leftrightarrow NN$ are studied from the viewpoint of quark substructure of baryons.They can be studied in nonmesonic weak decays of hypernuclei and also hyperon production in the $NN$ scattering. The direct quark mechanism in contrast to the one-pion exchange mechanism is shown to give sizable $\di=3/2$ contribution in the J=0 channel. Nonmesonic decay rates of $^4_{\Lambda}$H, $^4_{\Lambda}$He, and $^5_{\Lambda}$He agree with the current experimental data fairly well. Especially the $n/p$ ratio is enhanced by the direct quark contribution. The cross sections for $pn\to \Lam p$ scattering are studied in the quark cluster model approach.
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"abstract": "Two body weak processes $\\Lambda N \\leftrightarrow NN$ are studied from the\nviewpoint of quark substructure of baryons.They can be studied in nonmesonic\nweak decays of hypernuclei and also hyperon production in the $NN$ scattering.\nThe direct quark mechanism in contrast to the one-pion exchange mechanism is\nshown to give sizable $\\di=3/2$ contribution in the J=0 channel. Nonmesonic\ndecay rates of $^4_{\\Lambda}$H, $^4_{\\Lambda}$He, and $^5_{\\Lambda}$He agree\nwith the current experimental data fairly well. Especially the $n/p$ ratio is\nenhanced by the direct quark contribution. The cross sections for $pn\\to \\Lam\np$ scattering are studied in the quark cluster model approach.",
"arxiv_id": "nucl-th/9801026",
"authors": [
"Makoto Oka"
],
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"nucl-th"
],
"doi": "10.1016/S0375-9474(98)00289-9",
"journal_ref": "Nucl.Phys. A639 (1998) 317c-324c",
"title": "Direct Quark Mechanism for Weak $\\Lam N \\leftrightarrow NN$ Processes",
"url": "https://arxiv.org/abs/nucl-th/9801026"
},
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