Publications
Publication Information
| Title | Muon capture in nuclei: an {\itshape ab initio} approach based on quantum Monte Carlo methods | ||
| Authors | Alessandro Lovato, Noemi Rocco, Rocco Schiavilla | ||
| JLAB number | JLAB-THY-19-2899 | ||
| LANL number | arXiv:1903.08078 | ||
| Other number | DOE/OR/23177-4651 | ||
| Document Type(s) | (Journal Article) | ||
| Associated with EIC: | No | ||
| Supported by Jefferson Lab LDRD Funding: | No | ||
| Funding Source: | Nuclear Physics (NP) | ||
| Other Funding: | AC02-07CH11359 | ||
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Journal Compiled for Physical Review C Volume 100 Page(s) 035502 Refereed | |||
| Publication Abstract: | An {\it ab initio} quantum Monte Carlo method is introduced for calculating total rates of muon weakcapture in light nuclei with mass number $A \leq 12$. As a first application of the method, we perform a calculation of the rate in $^4$He in a dynamical framework based on realistic two- and three-nucleon interactions and realistic nuclear charge-changing weak currents. The currents include one- and two-body terms induced by $\pi$- and $\rho$-meson exchange, and $N$-to-$\Delta$ excitation, and are constrained to reproduce the empirical value of tritium Gamow-Teller matrix element. We investigate the sensitivity of theoretical predictions to current parametrizations of the nucleon axial and induced pseudoscalar form factors as well as to two-body contributions in the weak currents. The large uncertainites in the measured values obtained from bubble-chamber experiments (carried out over 50 years ago) prevent us from drawing any definite conclusions. | ||
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| Group: | THEORY CENTER | ||
| Document: | |||
| DOI: | https://doi.org/10.1103/PhysRevC.100.035502 | ||
| Accepted Manuscript: | 1903.08078.pdf | ||
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