Three-Nucleon Forces from Lattice QCD

2014 Fiscal Year Final Research Report

• Project/Area Number: 24740146
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The Institute of Physical and Chemical Research
• Principal Investigator: DOI Takumi 独立行政法人理化学研究所, 仁科加速器研究センター, 専任研究員 (70622554)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 三体力 / 核力 / 格子QCD

Outline of Final Research Achievements

The determination of three-nucleon forces, non-trivial interactions among three nucleons, is one of the most important subject in modern nuclear physics. In this study, we calculate three-nucleon forces directly based on QCD, the Standard Model of particle physics, by means of first-principles lattice QCD simulations.
Some of the major achievements are (1) development of a novel computational algorithm (Unified Contraction Algorithm) which speeds up the computation by a factor of 192 (2) establishing the theoretical definition of three-nucleon forces in field theory based on the asymptotic behavior of Nambu-Bethe-Salpeter wave functions for multi-particles (3) observation of the repulsive three-nucleon forces at short distance by lattice QCD simulations at various quark masses and lattice spacings.

Free Research Field

ハドロン物理