Suhonen, J. (2024) Viewpoint on β spectral shapes and nuclear muon capture. Il nuovo cimento C, 47 (6). pp. 1-5. ISSN 1826-9885
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Abstract
Experimental and theoretical studies of neutrinoless double beta (0νββ) decay are in the forefront of current particle and nuclear physics. Once found, 0νββ will have profound implications for the beyond-the-standard-model (BSM) physics. A crucial part of this mission is a reliable computation of the associated nuclear matrix elements (NMEs). In addition, there is an urgent need to access the effective value of the weak axial-vector coupling gA due to its strong effect on the sensitivity estimates of the 0νββ experiments. The quenching of gA has thus far been studied mostly through allowed Gamow-Teller β decays, but interesting new methods in the studies of β-electron spectra of forbidden non-unique β decays offer a fruitful new way of probing values of gA. Both theoretical and experimental activity on this subject now expands rapidly and may lead to breakthroughs in future. However, all these studies probe the value of gA at low momentum exchanges, whereas for high momentum exchanges, in the range of 100 MeV/c, relevant for 0νββ decay, a new probe, the ordinary muon capture (OMC), can be engaged. New muon-producing facilities are in operation and presently an increasing number of measurements of the OMC properties is being carried out. This holds promise for an expansion of future studies of 0νββ decays from this complementary point of view.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 10 Feb 2025 13:45 |
| Last Modified: | 10 Feb 2025 13:45 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23392 |
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