First results of baryon interactions from lattice QCD with physical masses (1) -- General overview and two-nucleon forces --

Abstract

We present the lattice QCD studies for baryon-baryon interactions for the first time with (almost) physical quark masses. $N_f=2+1$ gauge configurations are generated with the Iwasaki gauge action and nonperturbatively $O(a)$-improved Wilson quark action with stout smearing on the lattice of $(96a{)}^4\simeq (8.2\mathrm{fm}{)}^4$ with $a\simeq 0.085$ fm, where $m_{\pi }\simeq 146$ MeV and $m_K\simeq 525$ MeV. Baryon forces are calculated from Nambu-Bethe-Salpeter (NBS) correlation functions using the time-dependent HAL QCD method. In this report, we first give the general overview of the theoretical frameworks essential to the physical point calculation of baryon forces. We then present the numerical results for the two-nucleon central and tensor forces in ${}^3{S}_1$-${}^3{D}_1$ coupled channel and the central force in ${}^1{S}_0$ channel. In particular, a clear signal is obtained for the tensor force.

Talk given at 33rd International Symposium on Lattice Field Theory (Lattice 2015), Kobe, Japan, 14-18 Jul 2015, 7 pages, 5 figures

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Cited by in corpus (8)

• Towards an ab initio covariant density functional for nuclear structure
• Heavy Hadrons in Nuclear Matter
• Probing Multi-Strange Dibaryon with Proton-Omega Correlation in High-energy Heavy Ion Collisions
• Leading order relativistic hyperon-nucleon interactions in chiral effective field theory
• Strangeness $S=-1$ hyperon-nucleon scattering in covariant chiral effective field theory
• Doubly magic nuclei from Lattice QCD forces at $M_{PS}=$469 MeV/c${}^2$
• Baryon interactions from lattice QCD with physical masses -- Overview and $S=0,-4$ sectors --
• Towards Lattice QCD Baryon Forces at the Physical Point: First Results