5 papers · 1 filter
Taming nuclear size and shape effects in superallowed beta-decay
Bingcheng He, Mikhail Gorchtein, Matthias Heinz +3
We present the first combined analysis of the statistical rate function f in superallowed beta decays with ab initio calculations and data. We focus on C10 to 10B, 14O to 14N and 2…
In-medium similarity renormalization group for a pairing-plus-particle-hole model
L. H. Chen, Y. G. Yao, B. C. He
We benchmark two implementations of the in-medium similarity renormalization group (IMSRG) method, IMSRG(2) and IMSRG(2*), for the low-lying states of a pairing-plus-particle-hole…
Improving the predictive power of empirical shell-model Hamiltonians
J. A. Purcell, B. A. Brown, B. C. He +2
We present two developments which enhance the predictive power of empirical shell-model Hamiltonians for cases in which calibration data are sparse. A recent improvement in the ab…
IMSRG with flowing 3 body operators, and approximations thereof
S. R. Stroberg, T. D. Morris, B. C. He
We explore the impact of retaining three-body operators within the in-medium similarity renormalization group (IMSRG), as well as various approximations schemes. After studying two…
Factorized Approximation to the IMSRG(3)
B. C. He, S. R. Stroberg
We describe an approximation to the in-medium similarity renormalization group (IMSRG) method in which we include the effects of intermediate three-body operators arising within ne…