dorsal/arxiv
View SchemaCURRENTS AND THEIR COUPLINGS IN THE WEAK SECTOR OF THE STANDARD MODEL
| Authors | I. S. Towner, J. C. Hardy |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9504015 |
| URL | https://arxiv.org/abs/nucl-th/9504015 |
| DOI | 10.1142/9789812831446_0007 |
Abstract
Beta-decay and muon-capture experiments in nuclei are reviewed. The conserved vector current hypothesis is confirmed through the observed constancy of the vector coupling constant determined from the superallowed Fermi transitions and from the measurement of the weak-magnetism term in mirror Gamow-Teller transitions. The axial-vector and pseudoscalar coupling constants in the nucleon are determined from neutron decay and muon capture on the proton respectively. In finite nuclei, evidence for these coupling constants being reduced relative to their free-nucleon values is discussed. Meson-exchange currents are shown to be an important correction to the time-like part of the axial current as evident in first-forbidden beta decays. Tests of the Standard Model are discussed, as well as extensions beyond it involving right-hand currents and scalar interactions.
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"abstract": "Beta-decay and muon-capture experiments in nuclei are reviewed. The conserved\nvector current hypothesis is confirmed through the observed constancy of the\nvector coupling constant determined from the superallowed Fermi transitions and\nfrom the measurement of the weak-magnetism term in mirror Gamow-Teller\ntransitions. The axial-vector and pseudoscalar coupling constants in the\nnucleon are determined from neutron decay and muon capture on the proton\nrespectively. In finite nuclei, evidence for these coupling constants being\nreduced relative to their free-nucleon values is discussed. Meson-exchange\ncurrents are shown to be an important correction to the time-like part of the\naxial current as evident in first-forbidden beta decays. Tests of the Standard\nModel are discussed, as well as extensions beyond it involving right-hand\ncurrents and scalar interactions.",
"arxiv_id": "nucl-th/9504015",
"authors": [
"I. S. Towner",
"J. C. Hardy"
],
"categories": [
"nucl-th",
"hep-ph",
"nucl-ex"
],
"doi": "10.1142/9789812831446_0007",
"title": "CURRENTS AND THEIR COUPLINGS IN THE WEAK SECTOR OF THE STANDARD MODEL",
"url": "https://arxiv.org/abs/nucl-th/9504015"
},
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