Excited hadrons in n_f=2 QCD

Abstract

The chirally improved (CI) fermion action allows us to obtain results for pion masses down to 320 MeV on (in lattice units) comparatively small lattices with physical extent of 2.4 fm. We use differently smeared quarks sources to build sets of several interpolators. The variational method then leads to excellent ground state masses for most mesons and baryons. The excited state signals weaken in quality towards smaller quark masses. In particular the excited baryons come out too high.

7 pages, 4 figures, talk presented at the XXVII International Symposium on Lattice Field Theory, July 26-31, 2009, Peking University, Beijing, China

References in corpus (6)

• A novel quark-field creation operator construction for hadronic physics in lattice QCD
• Meson masses and decay constants from unquenched lattice QCD
• Scaling study of dynamical smeared-link clover fermions
• Isolating Excited States of the Nucleon in Lattice QCD
• Derivative sources in lattice spectroscopy of excited light-quark mesons
• Hard hadron spectroscopy

Cited by in corpus (2)

• Lattice study of light scalar tetraquarks with I=0,2,1/2,3/2: are sigma and kappa tetraquarks?
• Hadron Structure and Form Factors