dorsal/arxiv
View SchemaComposite vertices that lead to soft form factors
| Authors | L. C. Liu, Q. Haider, J. T. Londergan |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9503009 |
| URL | https://arxiv.org/abs/nucl-th/9503009 |
| DOI | 10.1103/PhysRevC.51.3427 |
| Journal | Phys.Rev.C51:3427-3434,1995 |
Abstract
The momentum-space cut-off parameter $\Lambda$ of hadronic vertex functions is studied in this paper. We use a composite model where we can measure the contributions of intermediate particle propagations to $\Lambda$. We show that in many cases a composite vertex function has a much smaller cut-off than its constituent vertices, particularly when light constituents such as pions are present in the intermediate state. This suggests that composite meson-baryon-baryon vertex functions are rather soft, i.e., they have \Lambda considerably less than 1 GeV. We discuss the origin of this softening of form factors as well as the implications of our findings on the modeling of nuclear reactions.
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"abstract": "The momentum-space cut-off parameter $\\Lambda$ of hadronic vertex functions\nis studied in this paper. We use a composite model where we can measure the\ncontributions of intermediate particle propagations to $\\Lambda$. We show that\nin many cases a composite vertex function has a much smaller cut-off than its\nconstituent vertices, particularly when light constituents such as pions are\npresent in the intermediate state. This suggests that composite\nmeson-baryon-baryon vertex functions are rather soft, i.e., they have \\Lambda\nconsiderably less than 1 GeV. We discuss the origin of this softening of form\nfactors as well as the implications of our findings on the modeling of nuclear\nreactions.",
"arxiv_id": "nucl-th/9503009",
"authors": [
"L. C. Liu",
"Q. Haider",
"J. T. Londergan"
],
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"nucl-th"
],
"doi": "10.1103/PhysRevC.51.3427",
"journal_ref": "Phys.Rev.C51:3427-3434,1995",
"title": "Composite vertices that lead to soft form factors",
"url": "https://arxiv.org/abs/nucl-th/9503009"
},
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