Baryon Interactions from Lattice QCD

Abstract

Two theoretical approaches (the direct method and the HAL QCD method) to study the baryonbaryon interactions in lattice QCD are reviewed with critical comparison between the two. The direct method is shown to have fatal problems in extracting two-baryon ground state energy. We present some applications of the HAL QCD method, which is a useful tool to study multi baryons in a controlled way, to the exotic dibaryons with the Ω-baryon.

Conference Summary of QNP2018

“…The QNP conferences are series of meetings previously held in Adelaide (2000), Jülich (2002), Bloomington (2004), Madrid (2006), Beijing (2009), Palaiseau (2012), and Valparaiso (2015. This QNP2018 was held at the Tsukuba International Congress Center in Tsukuba, Japan on November [13][14][15][16][17]2018. At this conference, experimentalists and theorists discussed recent developments in nuclear physics, and the following topics were covered [6]:…”

“…Lattice QCD studies became increasingly important in nuclear physics with the progress of supercomputer power and theoretical developments since it is the only possible way to calculate nonperturbative quantities directly from QCD, although actual applications are still limited to the zero baryon density phenomena. The lattice studies are in a good situation in hadron spectroscopy, baryon-baryon interactions, and quark-hadron matters at the zero density [17].…”

Conference Summary of QNP2018

“…The QNP conferences are series of meetings previously held in Adelaide (2000), Jülich (2002), Bloomington (2004), Madrid (2006), Beijing (2009), Palaiseau (2012), and Valparaiso (2015. This QNP2018 was held at the Tsukuba International Congress Center in Tsukuba, Japan on November [13][14][15][16][17]2018. At this conference, experimentalists and theorists discussed recent developments in nuclear physics, and the following topics were covered [6]: (A) Quark and gluon structure of hadrons, (B) Hadron spectroscopy, (C) Hadron interactions and nuclear structure, (D) Hot and cold dense matter.…”

“…The fast-developing area of lattice QCD in hadron physics is on an application to parton distribution functions (PDFs) [17]. Since they are defined by lightcone-separated field correlators, it was not possible to calculate the Bjorken-x dependent PDFs.…”