Chiral two-body currents in nuclei: Gamow-Teller transitions and neutrinoless double-beta decay

Autor: Menéndez, J., Gazit, D., Schwenk, A.
Rok vydání: 2011
Předmět:
Zdroj: Phys.Rev.Lett.107:062501,2011
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevLett.107.062501
Popis: We show that chiral effective field theory (EFT) two-body currents provide important contributions to the quenching of low-momentum-transfer Gamow-Teller transitions, and use chiral EFT to predict the momentum-transfer dependence that is probed in neutrinoless double-beta decay. We then calculate for the first time the neutrinoless double-beta decay operator based on chiral EFT currents and study the nuclear matrix elements at successive orders. The contributions from chiral two-body currents are significant and should be included in all calculations.
Comment: 4 pages, 3 figures; improved version, with clarifications and added references
Databáze: arXiv