TY  - JOUR
AU  - Pavao, R.
AU  - Gubler, P.
AU  - Fernandez-Soler, P.
AU  - Nieves, J.
AU  - Oka, M.
AU  - Takahashi, T. T.
PY  - 2021
DA  - 2021//
TI  - The negative-parity spin-1/2 A baryon spectrum from lattice QCD and effective theory
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 136473
EP  - 8pp
VL  - 820
PB  - Elsevier
AB  - The spectrum of the negative-parity spin-1/2 Lambda baryons is studied using lattice QCD and hadronic effective theory in a unitarized coupled-channel framework. A direct comparison between the two approaches is possible by considering the hadronic effective theory in a finite volume and with hadron masses and mesonic decay constants that correspond to the situation studied on the lattice. Comparing the energy level spectrum and SU(3) flavor decompositions of the individual states, it is found that the lowest two states extracted from lattice QCD can be associated with one of the two Lambda(1405)-poles and the Lambda(1670) resonance. The quark mass dependences of these two lattice QCD levels are in good agreement with their effective theory counterparts. However, as current lattice QCD studies still rely on three-quark operators to generate the physical states, clear signals corresponding to the meson-baryon scattering states, that appear in the finite volume effective theory calculation, are not yet seen.
SN  - 0370-2693
UR  - https://arxiv.org/abs/2010.01270
UR  - https://doi.org/10.1016/j.physletb.2021.136473
DO  - 10.1016/j.physletb.2021.136473
LA  - English
N1  - WOS:000713101800041
ID  - Pavao_etal2021
ER  -