dorsal/arxiv
View SchemaChiral O(Q^4) two-body operators for s-wave pion photoproduction on the NN system
| Authors | A. Gardestig |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0604035 |
| URL | https://arxiv.org/abs/nucl-th/0604035 |
| DOI | 10.1103/PhysRevC.74.017001 |
| Journal | Phys.Rev.C74:017001,2006 |
Abstract
The two-body currents for s-wave pion photoproduction on the NN system are derived to O(Q^4) in chiral perturbation theory. For the interesting case of 3S1 <-> 1S0 transitions, we show that an axial isovector two-nucleon contact term connects the short-distance physics of pion photoproduction to pion production and several important electroweak reactions. We also find that the standard chiral Lagrangian gives a gamma pi pi N N vertex that have not been explicitly mentioned in previous literature. The corresponding Feynman rule is presented here and some processes where it should be important are briefly discussed.
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"abstract": "The two-body currents for s-wave pion photoproduction on the NN system are\nderived to O(Q^4) in chiral perturbation theory. For the interesting case of\n3S1 \u003c-\u003e 1S0 transitions, we show that an axial isovector two-nucleon contact\nterm connects the short-distance physics of pion photoproduction to pion\nproduction and several important electroweak reactions. We also find that the\nstandard chiral Lagrangian gives a gamma pi pi N N vertex that have not been\nexplicitly mentioned in previous literature. The corresponding Feynman rule is\npresented here and some processes where it should be important are briefly\ndiscussed.",
"arxiv_id": "nucl-th/0604035",
"authors": [
"A. Gardestig"
],
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"nucl-th"
],
"doi": "10.1103/PhysRevC.74.017001",
"journal_ref": "Phys.Rev.C74:017001,2006",
"title": "Chiral O(Q^4) two-body operators for s-wave pion photoproduction on the NN system",
"url": "https://arxiv.org/abs/nucl-th/0604035"
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