dorsal/arxiv
View SchemaComment on 'Induced Pseudoscalar Coupling Constant' by Il-Tong Cheon and Myung Ki Cheoun (nucl-th/9811009)
| Authors | Harold W. Fearing, TRIUMF |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9811027 |
| URL | https://arxiv.org/abs/nucl-th/9811027 |
Abstract
In a recent preprint Cheon and Cheoun have derived from a chiral model an additional term, not usually appearing in the standard matrix element for radiative muon capture. Using that term they generate a large correction to the RMC spectrum which tends to resolve the problem caused by the too large value of $g_P$ found in the TRIUMF RMC experiment. In this comment we observe first that their extra term leads to an amplitude which is not gauge invariant and second that such a term should be present, in a gauge invariant way, in an earlier full chiral perturbation theory calculation, which however found negligible differences from the standard approach.
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"date_created": "2026-03-02T18:00:25.438000Z",
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"abstract": "In a recent preprint Cheon and Cheoun have derived from a chiral model an\nadditional term, not usually appearing in the standard matrix element for\nradiative muon capture. Using that term they generate a large correction to the\nRMC spectrum which tends to resolve the problem caused by the too large value\nof $g_P$ found in the TRIUMF RMC experiment. In this comment we observe first\nthat their extra term leads to an amplitude which is not gauge invariant and\nsecond that such a term should be present, in a gauge invariant way, in an\nearlier full chiral perturbation theory calculation, which however found\nnegligible differences from the standard approach.",
"arxiv_id": "nucl-th/9811027",
"authors": [
"Harold W. Fearing",
"TRIUMF"
],
"categories": [
"nucl-th"
],
"title": "Comment on \u0027Induced Pseudoscalar Coupling Constant\u0027 by Il-Tong Cheon and Myung Ki Cheoun (nucl-th/9811009)",
"url": "https://arxiv.org/abs/nucl-th/9811027"
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