Induced Pseudoscalar Coupling of the Proton Weak Interaction
Jun, 200258 pages
Published in:
- Rev.Mod.Phys. 76 (2004) 31-91
e-Print:
- nucl-th/0206039 [nucl-th]
Report number:
- TRI-PP-02-08
Citations per year
Abstract:
The induced pseudoscalar coupling is the least well known of the weak coupling constants of the proton's charged--current interaction. Its size is dictated by chiral symmetry arguments, and its measurement represents an important test of quantum chromodynamics at low energies. During the past decade a large body of new data relevant to the coupling has been accumulated. This data includes measurements of radiative and non radiative muon capture on targets ranging from hydrogen and few--nucleon systems to complex nuclei. Herein the authors review the theoretical underpinnings of , the experimental studies of , and the procedures and uncertainties in extracting the coupling from data. Current puzzles are highlighted and future opportunities are discussed.- review
- p: weak interaction
- charged current
- coupling constant: pseudoscalar
- nuclear physics
- PCAC model
- pi: decay
- symmetry: chiral
- muon nucleus: capture
- muon: radiative capture
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