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

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

2011-03-18

arxiv.org/abs/1103.3622v3

Phys.Rev.Lett.107:062501,2011

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures; improved version, with clarifications and added references

Scientific paper

10.1103/PhysRevLett.107.062501

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.

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