Journal
PHYSICS LETTERS B
Volume 732, Issue -, Pages 110-115Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2014.03.023
Keywords
Nuclear structure; Chiral effective field theory; Lattice Monte Carlo
Funding
- Deutsche Forschungsgemeinschaft [Sino-German CRC 110]
- Helmholtz Association [VH-VI-417]
- BMBF [05P12PDFTE]
- U.S. National Science Foundation [PHY-1307453]
- U.S. Department of Energy [DE-FG02-03ER41260]
- EU Hadron-Physics3 project
- ERC Project [259218 NUCLEAREFT]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1307453] Funding Source: National Science Foundation
Ask authors/readers for more resources
We extend Nuclear Lattice Effective Field Theory (NLEFT) to medium-mass nuclei, and present results for the ground states of alpha nuclei from He-4 to Si-28, calculated up to next-to-next-to-leading order (NNLO) in the EFT expansion. This computational advance is made possible by extrapolations of lattice data using multiple initial and final states. For our soft two-nucleon interaction, we find that the overall contribution from multi-nucleon forces must change sign from attractive to repulsive with increasing nucleon number. This effect is not produced by three-nucleon forces at NNLO, but it can be approximated by an effective four-nucleon interaction. We discuss the convergence of the EFT expansion and the broad significance of our findings for future ab initio calculations. (C) 2014 The Authors. Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available