https://doi.org/10.1140/epja/i2007-10392-7
Regular Article - Nuclear Structure and Reactions
Chiral invariant phase space event generator
Nuclear muon capture at rest
CERN, 1211, Geneva, Switzerland
* e-mail: Mikhail.Kossov@cern.ch
Received:
16
March
2007
Accepted:
6
June
2007
Published online:
22
June
2007
The Geant4 CHIPS model simulates both decay and nuclear capture of negative muons. In hadron level models the muon is captured by a proton, p(μ,νμ)n , and the neutron transfers to the nucleus only 5MeV, which is not enough to split a nucleon from the nucleus, while the measured spectra of emitted nucleons reach 80MeV. In CHIPS, which considers asymptotically free quark-partons, the muon can be captured by a quark, u(μ,νμ)d , and transfers 52MeV to the nucleus. This capture mechanism fits the main part of the nucleon spectra, while the high-energy part of the spectra is not fitted. A precise fit of the high-energy part of the nucleon spectra can be made if the muon decay μ → d¯νμ is taken into account.
PACS: 02.70.Ss Quantum Monte Carlo methods – / 12.38.Mh Quark-gluon plasma – / 24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes –
© Società Italiana di Fisica and Springer-Verlag, 2007
