Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2012-04-16
Physics
High Energy Physics
High Energy Physics - Lattice
5 pages, 4 figures
Scientific paper
The low-energy neutron-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 ~ 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 QCD are consistent with those extracted from hyperon-nucleon experimental data within uncertainties, and strengthen theoretical arguments that the strange quark is a crucial component of dense nuclear matter.
Beane Silas R.
Chang Elizabeth
Cohen Saul D.
Detmold William
Lin Hsing-Wen
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