Baryon-baryon interactions from chiral effective field theory

TL;DR

This paper explores baryon-baryon interactions with strangeness using chiral effective field theory, reviewing leading order results, addressing the H-dibaryon binding energy extrapolation, and presenting initial next-to-leading order findings.

Contribution

It applies chiral effective field theory to hyperon interactions, extending previous nucleon-nucleon studies, and discusses extrapolation of lattice QCD results to physical conditions.

Findings

Leading order hyperon-nucleon and hyperon-hyperon interactions reviewed.

Extrapolation of H-dibaryon binding energy from lattice QCD discussed.

Initial next-to-leading order hyperon-nucleon interaction results presented.

Abstract

Results from an ongoing study of baryon-baryon systems with strangeness S=-1 and -2 within chiral effective field theory are reported. The investigations are based on the scheme proposed by Weinberg which has been applied rather successfully to the nucleon-nucleon interaction in the past. Results for the hyperon-nucleon and hyperon-hyperon interactions obtained to leading order are reviewed. Specifically, the issue of extrapolating the binding energy of the H-dibaryon, extracted from recent lattice QCD simulations, to the physical point is addressed. Furthermore, first results for the hyperon-nucleon interaction at next-to-leading order are presented and discussed.