Hadronic molecules for charmed and bottom baryons near thresholds

TL;DR

This paper investigates the formation of hadronic molecules involving heavy mesons and nucleons near thresholds, revealing numerous bound and resonant states influenced by heavy quark and chiral symmetries, which can inform the understanding of excited heavy baryons.

Contribution

It introduces a comprehensive analysis of DN and D*N (BbarN and Bbar*N) molecular states considering symmetry constraints and tensor forces, identifying many new bound and resonant states.

Findings

Multiple bound and resonant states with various J^P quantum numbers.

States are predominantly in isospin singlet channels.

Few resonant states in isospin triplet channels.

Abstract

We study hadronic molecules formed by a heavy meson and a nucleon, DN and D*N (BbarN and Bbar*N) systems. Respecting the heavy quark symmetry and chiral symmetry, we consider the DN-D*N (BbarN-Bbar*N$) mixing induced by the one boson exchange potential including the tensor force. We find many bound and resonant states with J^P=1/2^\pm, 3/2^\pm, 5/2^\pm and 7/2^- in isospin singlet channels, while only a few resonant states with J^P=1/2^- in isospin triplet channels. The analysis of DN and D*N (BbarN and Bbar*N) molecules will be useful to study mass spectra of excited charmed (bottom) baryons with large angular momenta, when their masses are close to the DN and D*N (BbarN and Bbar*N) thresholds.