dorsal/arxiv
View SchemaThe Weak Parity-Violating Pion-Nucleon Coupling
| Authors | E. M. Henley, W-Y. P. Hwang, L. S. Kisslinger |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9501031 |
| URL | https://arxiv.org/abs/nucl-th/9501031 |
Abstract
We use QCD sum rules to obtain the weak parity-violating pion-nucleon coupling constant $f_{\pi NN}$. We find that $f_{\pi NN}\approx 3\times 10^{-8}$, up to an order of magnitude smaller than the ``best estimates" based on quark models. This result follows from the cancellation between perturbative and nonperturbative QCD processes not found in quark models, but explicit in the QCD sum rule method. Our result is consistent with the experimental upper limit found from $^{18}$F parity-violating measurements.
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"date_created": "2026-03-02T18:00:14.707000Z",
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"abstract": "We use QCD sum rules to obtain the weak parity-violating pion-nucleon\ncoupling constant $f_{\\pi NN}$. We find that $f_{\\pi NN}\\approx 3\\times\n10^{-8}$, up to an order of magnitude smaller than the ``best estimates\" based\non quark models. This result follows from the cancellation between perturbative\nand nonperturbative QCD processes not found in quark models, but explicit in\nthe QCD sum rule method. Our result is consistent with the experimental upper\nlimit found from $^{18}$F parity-violating measurements.",
"arxiv_id": "nucl-th/9501031",
"authors": [
"E. M. Henley",
"W-Y. P. Hwang",
"L. S. Kisslinger"
],
"categories": [
"nucl-th"
],
"title": "The Weak Parity-Violating Pion-Nucleon Coupling",
"url": "https://arxiv.org/abs/nucl-th/9501031"
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