Quantum Monte Carlo calculations of electroweak transition matrix elements in A = 6,7 nuclei

Details Quantum Monte Carlo calculations of electroweak transition matrix elements in A = 6,7 nuclei Quantum Monte Carlo calculations of electroweak transition matrix elements in A = 6,7 nuclei

2007-10-05

arxiv.org/abs/0710.1265v2

Phys.Rev.C76:064319,2007

Physics

Nuclear Physics

Nuclear Theory

v2: minor corrections to text and figures

Scientific paper

10.1103/PhysRevC.76.064319

Green's function Monte Carlo calculations of magnetic dipole, electric quadrupole, Fermi, and Gamow-Teller transition matrix elements are reported for A=6,7 nuclei. The matrix elements are extrapolated from mixed estimates that bracket the relevant electroweak operator between variational Monte Carlo and GFMC propagated wave functions. Because they are off-diagonal terms, two mixed estimates are required for each transition, with a VMC initial (final) state paired with a GFMC final (initial) state. The realistic Argonne v18 two-nucleon and Illinois-2 three-nucleon interactions are used to generate the nuclear states. In most cases we find good agreement with experimental data.

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