期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.172001
关键词
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资金
- USQCD SciDAC Project
- NERSC
- ALCF (Office of Science of the DOE) [DE-AC02-05CH11231, DE-AC02-06CH11357]
- UW Hyak facility (NSF Grant) [PHY-09227700]
- BSCCNS (Barcelona)
- LLNL
- XSEDE
- NSF Grant [OCI-1053575, CAREER PHY0645570, PHY-0555234, CCF-0728915]
- DOE [DE-AC02-05CH11231, DE-FG03-97ER4014, DE-AC05-06OR23177, DE-FG02-04ER41302, OJI DE-SC0001784, DE-FC02-06ER41443]
- MEC and FEDER [FIS2008-01661]
- Jeffress Memorial Trust Grant [J-968]
- Direct For Mathematical & Physical Scien
- Division Of Physics [0922770] Funding Source: National Science Foundation
The low-energy n Sigma(-) interactions determine, in part, the role of the strange quark in dense matter, such as that found in astrophysical environments. The scattering phase shifts for this system are obtained from a numerical evaluation of the QCD path integral using the technique of lattice QCD. Our calculations, performed at a pion mass of m(pi) similar to 389 MeV in two large lattice volumes and at one lattice spacing, are extrapolated to the physical pion mass using effective field theory. The interactions determined from lattice QCD are consistent with those extracted from hyperon-nucleon experimental data within uncertainties and strengthen model-dependent theoretical arguments that the strange quark is a crucial component of dense nuclear matter.
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