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- Title
Ordinary Muon Capture on 136 Ba: Comparative Study Using the Shell Model and pnQRPA.
- Authors
Gimeno, Patricia; Jokiniemi, Lotta; Kotila, Jenni; Ramalho, Marlom; Suhonen, Jouni
- Abstract
In this work, we present a study of ordinary muon capture (OMC) on 136 Ba, the daughter nucleus of 136 Xe double beta decay (DBD). The OMC rates at low-lying nuclear states (below 1 MeV of excitation energy) in 136 Cs are assessed by using both the interacting shell model (ISM) and proton–neutron quasiparticle random-phase approximation (pnQRPA). We also add chiral two-body (2BC) meson-exchange currents and use an exact Dirac wave function for the captured s-orbital muon. OMC can be viewed as a complementary probe of the wave functions in 136 Cs, the intermediate nucleus of the 136 Xe DBD. At the same time, OMC can be considered a powerful probe of the effective values of weak axial-type couplings in a 100 MeV momentum exchange region, which is relevant for neutrinoless DBD. The present work represents the first attempt to compare the ISM and pnQRPA results for OMC on a heavy nucleus while also including the exact muon wave function and the 2BC. The sensitivity estimates of the current and future neutrinoless DBD experiments will clearly benefit from future OMC measurements taken using OMC calculations similar to the one presented here.
- Subjects
DOUBLE beta decay; MUONS; HEAVY nuclei; DIRAC function
- Publication
Universe (2218-1997), 2023, Vol 9, Issue 6, p270
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe9060270