Formal Theory of Heavy Ion Double Charge Exchange Reactions
| Autor: | Lenske, Horst, Bellone, Jessica, Colonna, Maria, Gambacurta, Danilo, Lay, Jose-Antonio |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | EPJ Web Conf. 292 (2024) 04001 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1051/epjconf/202429204001 |
| Popis: | The theory of heavy ion double charge exchange (DCE) reactions $A(Z,N)\to A(Z\pm 2,N\mp 2)$ is recapitulated emphasizing the role of Double Single Charge Exchange (DSCE) and pion-nucleon Majorana DCE (MDCE) reactions. DSCE reactions are of second--order distorted wave character, mediated by isovector nucleon-nucleon (NN) interactions. The DSCE response functions resemble the nuclear matrix elements (NME) of $2\nu 2\beta$ decay. The MDCE process proceeds by a dynamically generated effective rank-2 isotensor interaction, defined by off--shell pion--nucleon DCE scattering. In closure approximation pion potentials and two--nucleon correlations are obtained, similar to the neutrino potentials and the intranuclear exchange of Majorana neutrinos in $0\nu 2 \beta$ Majorana double beta decay (MDBD). Comment: 8 pages, 6 figures, Contribution to NRM 16, Varenna, JUne 2023 |
| Databáze: | arXiv |
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