dorsal/arxiv
View SchemaAxial Vector Current and Induced Pseudoscalar Coupling Constant on $\mu^- p \to n \nu_{\mu} \gamma$ reaction
| Authors | Il-Tong Cheon, Myung KI Cheoun |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9906035 |
| URL | https://arxiv.org/abs/nucl-th/9906035 |
Abstract
The recent TRIUMF experiment for $\mu^- p \to n \nu_{\mu} \gamma$ gave a surprising result that the induced pseudoscalar coupling constant $g_P$ was larger than the value obtained from $\mu^- p \to n \nu_{\mu}$ experiment as much as 44 %. Reexamining axial vector current on the gauge theory, we found an additional term to the matrix element of Beder and Fearing which was used to extract the $g_P$ value from the measured photon energy spectrum. This additional term, which is self gauge invariant, plays a key role in restoring the reliability of $g_P (- 0.88 m_{\mu}^2) = 6.77 g_A (0)$. Comparison with conventional approaches is also presented.
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"date_created": "2026-03-02T18:00:25.364000Z",
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"abstract": "The recent TRIUMF experiment for $\\mu^- p \\to n \\nu_{\\mu} \\gamma$ gave a\nsurprising result that the induced pseudoscalar coupling constant $g_P$ was\nlarger than the value obtained from $\\mu^- p \\to n \\nu_{\\mu}$ experiment as\nmuch as 44 %. Reexamining axial vector current on the gauge theory, we found an\nadditional term to the matrix element of Beder and Fearing which was used to\nextract the $g_P$ value from the measured photon energy spectrum. This\nadditional term, which is self gauge invariant, plays a key role in restoring\nthe reliability of $g_P (- 0.88 m_{\\mu}^2) = 6.77 g_A (0)$. Comparison with\nconventional approaches is also presented.",
"arxiv_id": "nucl-th/9906035",
"authors": [
"Il-Tong Cheon",
"Myung KI Cheoun"
],
"categories": [
"nucl-th"
],
"title": "Axial Vector Current and Induced Pseudoscalar Coupling Constant on $\\mu^- p \\to n \\nu_{\\mu} \\gamma$ reaction",
"url": "https://arxiv.org/abs/nucl-th/9906035"
},
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