منابع مشابه
Supermultiplet breaking in nuclear muon capture
2014 Supermultiplet symmetry is broken in the muon capture by 40Ca with the emission of neutrons when the final state interaction is taken into account. This breaking of symmetry is attributed to the spin-orbit term in the optical potential and is found to be large at lower neutron energies ( 30 MeV). However, we find that high energy neutrons seem to be unaffected by the spin-orbit interaction...
متن کاملMuon Lifetime and Muon Capture
We present an introduction to the MuLAN and MuCAP experiments at PSI, which aim at high precision determinations of two fundamental Weak Interactions parameters: the Fermi constant GF and the induced pseudoscalar form factor gp, respectively. MULAN MUON LIFETIME The Fermi coupling constant GF is one of the fundamental constants of the Standard Model. GF is obtained from the muon lifetime via a ...
متن کاملNuclear Muon Capture in Hydrogen and its Interplay with Muon Atomic Physics
The singlet capture rate ΛS for the semileptonic weak process μ+ p → n+ νμ has been measured in the MuCap experiment [2]. The novel experimental technique is based on stopping muons in an active target, consisting of a time projection chamber operating with ultra-pure hydrogen. This allows the unambiguous determination of the pseudoscalar form factor gP of the charged electroweak current of the...
متن کاملRadiative Muon Capture in Heavy Baryon Chiral Perturbation Theory
The radiative muon capture(RMC) on a proton is analyzed by means of heavy baryon chiral perturbation theory. The emitted photon energy spectrum is calculated and compared with the experimental data by taking the spin sum on the muonic atom states. We find that one-loop order corrections to the tree order amplitude modify the photon spectrum by less than five percent. This calculation supports t...
متن کاملRadiative Muon Capture by a Proton in Chiral Perturbation Theory
The first measurement of the radiative muon capture (RMC) rate on a proton was recently carried out at TRIUMF. The TRIUMF group analyzed the RMC rate, Γ RMC, in terms of the theoretical formula of Beder and Fearing, and found the surprising result that gP ≡ fP (q2 = −0.88mμ) is 1.5 times the value expected from PCAC. To assess the reliability of the theoretical framework used by the TRIUMF grou...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics Supplement
سال: 2013
ISSN: 0375-9687
DOI: 10.1143/ptp.60.171