Toward Bound-State Approach to Strangeness in Holographic QCD

TL;DR

This paper explores a holographic QCD model to understand hyperons as bound states of baryons and kaons, finding weakly bound states similar to 1(1405), differing from traditional Skyrme model results.

Contribution

It introduces a bound-state approach to strangeness within the Sakai-Sugimoto holographic QCD model, contrasting with the Skyrme model's predictions.

Findings

Weak bound-state corresponding to 1(1405) observed

Strongly-bound hyperon-states are absent in this model

Differences from the Skyrme model are highlighted

Abstract

An approach to realize a hyperon as a bound-state of a two-flavor baryon and a kaon is considered in the context of the Sakai-Sugimoto model of holographic QCD, which approach has been known in the Skyrme model as the bound-state approach to strangeness. As a simple case of study, pseudo-scalar kaon is considered as fluctuation around a baryon. In this case, strongly-bound hyperon-states are absent, different from the case of the Skyrme model. Observed is a weak bound-state which would correspond to \Lambda(1405).