Baryon-baryon interaction of strangeness S=-1 sector

2012/03/15 by Hidekatsu Nemura, Nemura, Hidekatsu, for HAL QCD Collaboration +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #Nuclear Theory (nucl-th) #hep-lat #nucl-th

paper · pdf · doi:10.48550/arxiv.1203.3320

7 pages, 6 figures, presented at the XXIX International Symposium on Lattice Field Theory (Lattice2011), July 10-16, 2011, Squaw Valley, Lake Tahoe, California

arxiv created 2012/03/15 · arxiv updated 2012/03/16

Abstract

We present our recent studies on hyperon-nucleon (YN) interactions in the strangeness S=-1 that pΛ, Σ⁰ p and Σ⁺ n, by extracting corresponding potentials through Nambu-Bethe-Salpeter wave functions. We calculate ΛN and ΣN potentials in the isospin I=3/2 channel, using the N_f=2+1 gauge configurations generated by PACS-CS collaboration and employing an improved method to obtain potentials in lattice QCD simulations. For the ¹S₀ channel, the central ΣN (I=3/2, ¹S₀) potential and the central ΛN (¹S₀) potential are found to be very similar. In the spin triplet (³S₁-³D₁) channels, the central ΛN(³S₁-³D₁) potential is attractive while the central ΣN(I=3/2, ³S₁-³D₁) potentials is repulsive. Tensor potentials, on the other hand, are rather weak in the diagonal part of both ΛN and ΣN(I=3/2) systems.

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