Masses of excited baryons from chirally improved quenched lattice QCD
arXiv:nucl-th/0501025 · doi:10.1016/j.nuclphysa.2005.03.058
Abstract
Whereas ground state spectroscopy for quenched QCD is well understood, it is still a challenge to obtain results for excited hadron states. In our study we present results from a new approach for determining spatially optimized operators for lattice spectroscopy of excited hadrons. In order to be able to approach physical quark masses we work with the chirally improved Dirac operator, i.e., approximate Ginsparg-Wilson fermions. Since these are computationally expensive we restrict ourselves to a few quark sources. We use Jacobi smeared quark sources with different widths and combine them to construct hadron operators with different spatial wave functions. This allows us to identify the Roper state and other excited baryons, also in the strange sector.
Contribution to BARYONS 2004, Palaiseau, France, October 25 - 29, 2004; 4 pages, 1 figure, Style espcrc1
References in corpus (2)
Cited by in corpus (11)
- Excited hadrons on the lattice: Baryons
- Clebsch-Gordan Construction of Lattice Interpolating Fields for Excited Baryons
- Excited hadrons on the lattice: Mesons
- Hadron Spectroscopy with Dynamical Chirally Improved Fermions
- Isolating Excited States of the Nucleon in Lattice QCD
- Derivative sources in lattice spectroscopy of excited light-quark mesons
- Variational method for lattice spectroscopy with ghosts
- Isolating the Roper Resonance in Lattice QCD
- Roper resonances in chiral quark models
- Baryons on the lattice
- Excited meson spectroscopy with chirally improved fermions