Exotic baryons from a heavy meson and a nucleon -- Negative parity states --

TL;DR

This paper investigates exotic heavy baryons formed by a heavy meson and a nucleon, revealing bound and resonant states with specific quantum numbers, suggesting their existence in charm and heavier flavors.

Contribution

It demonstrates the survival of a previously found bound state and predicts a new resonant state in heavy baryon systems with exotic flavor quantum numbers.

Findings

Bound state in (I,JP) =(0,1/2-) channel persists with short-range interactions.

Discovery of a resonant state with (I,JP)=(0,3/2-) as a Feshbach resonance.

Exotic states are predicted to exist for charm and heavier flavors.

Abstract

We study heavy baryons with an exotic flavor quantum number formed by a heavy meson and a nucleon (Dbar-N and B-N) through a long range one pion exchange interaction. The bound state found previously in the (I,JP) =(0,1/2-) channel survives when short range interaction is included. In addition, we find a resonant state with (I,JP)=(0,3/2-) as a Feshbach resonance predominated by a heavy vector meson and a nucleon (Dbar*-N and B*-N). We find that these exotic states exist for the charm and heavier flavor region.