Muon capture in deuterium
- NázevTitle
- Muon capture in deuteriumMuon capture in deuterium
- Druh výsledkuResult type
- Ostatní výsledekOther result
- AutořiAuthors
- P. Ricci, E. Truhlík, B. Mosconi, J. Smejkal
- Časopis / citaceJournal / citation
- arXiv.org. 2009, 2009(12),
- RokYear
- 2009
- JazykLanguage
- eng
- RIVRIV
- RIV/68407700:21670/09:00179841!RIV11-MSM-21670___
- ProjektProject
- Fundamentální experimenty ve fyzice mikrosvětaFundamental Experiments in Physics of Microworld
AbstraktAbstract
Model dependence of the capture rates of the negative muon capture in deuterium is studied starting from potential models and the weak two-body meson exchange currents constructed in the tree approximation and also from an effective field theory. The tree one-boson exchange currents are derived from the hard pion chiral Lagrangians of the NΔπρωa1 system. If constructed in conjunction with the one-boson exchange potentials, the capture rates can be calculated consistently. On the other hand, the effective field theory currents, constructed within the heavy baryon chiral perturbation theory, contain a low energy constant d̂ R that cannot be extracted from data at the one-particle level nor determined from the first principles. Comparative analysis of the results for the doublet transition rate allows us to extract the constant d̂ R.
Model dependence of the capture rates of the negative muon capture in deuterium is studied starting from potential models and the weak two-body meson exchange currents constructed in the tree approximation and also from an effective field theory. The tree one-boson exchange currents are derived from the hard pion chiral Lagrangians of the NΔπρωa1 system. If constructed in conjunction with the one-boson exchange potentials, the capture rates can be calculated consistently. On the other hand, the effective field theory currents, constructed within the heavy baryon chiral perturbation theory, contain a low energy constant d̂ R that cannot be extracted from data at the one-particle level nor determined from the first principles. Comparative analysis of the results for the doublet transition rate allows us to extract the constant d̂ R.