Achenbach, P. (2019) Light hypernuclei —a testbed for charge symmetry breaking. Il nuovo cimento C, 42 (2-3). pp. 1-8. ISSN 1826-9885
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Abstract
Charge symmetry can be considered as an approximate symmetry in nuclear structure and interactions. It is broken in quantum chromodynamics by the up and down quark mass difference and electromagnetic interactions on the level of 10−3. In Λ hypernuclei, charge symmetry breaking (CSB) manifests itself in a charge dependence of Λ separation energies. At the Mainz Microtron MAMI, the novel method of high-resolution spectroscopy of decay-pions in strangeness electroproduction was established to measure Λ separation energies. A sizable CSB effect was reaffirmed for the A = 4 mirror pair and until recently, it could not be reproduced in any ab initio 4-body calculation. The full understanding of this large and spin-dependent effect remains one of the unresolved issues of hypernuclear physics.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 30 Nov 2020 09:51 |
| Last Modified: | 30 Nov 2020 09:51 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/20419 |
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