QCD with Two Light Dynamical Chirally Improved Quarks

Results for the excited meson and baryon spectrum with two flavors of Chirally Improved sea quarks are presented. We simulate several ensembles with pion masses ranging from 250 to 600 MeV and extrapolate to the physical pion mass. Strange quarks are treated within the partially quenched approximation. Using the variational method, we investigate the content of the states. Among others, we discuss the flavor singlet/octet content of Lambda states. In general, our results compare well with experiment, in particular we get very good agreement with the Lambda(1405) and confirm its flavor singlet nature.

[1]  R. Edwards,et al.  Flavor structure of the excited baryon spectra from lattice QCD , 2012, 1212.5236.

[2]  P. Boyle,et al.  Domain wall QCD with near-physical pions , 2012, 1208.4412.

[3]  C. Lang,et al.  Low-lying $\Lambda$ baryons from the lattice , 2012, 1212.2032.

[4]  D. Mohler.  Review of lattice studies of resonances , 2012, 1211.6163.

[5]  Z. Fodor,et al.  Light Hadron Masses from Lattice QCD , 2012, 1203.4789.

[6]  M. Döring,et al.  Finite volume effects in pion-kaon scattering and reconstruction of the κ(800) resonance , 2011, 1111.0616.

[7]  P. Cochat,et al.  Et al , 2008, Archives de pediatrie : organe officiel de la Societe francaise de pediatrie.

[8]  J. Bulava.  Progress on Excited Hadrons in Lattice QCD , 2011, 1112.0212.

[9]  Huey-Wen Lin.  Review of Baryon Spectroscopy in Lattice QCD , 2011, 1106.1608.

[10]  C. Lang,et al.  Meson and baryon spectrum for QCD with two light dynamical quarks , 2010, 1005.1748.

[11]  T. Manke,et al.  Excited charmonium spectrum from anisotropic lattices , 2002, hep-lat/0210030.

[12]  C. Gattringer,et al.  Approximate Ginsparg-Wilson fermions: A First test , 2000, hep-lat/0007042.

[13]  C. Gattringer.  A New approach to Ginsparg-Wilson fermions , 2000, hep-lat/0003005.

[14]  Hayes,et al.  Review of Particle Physics. , 1996, Physical review. D, Particles and fields.

[15]  M. Lüscher.  Signatures of unstable particles in finite volume , 1991 .

[16]  M. Lüscher.  Two-particle states on a torus and their relation to the scattering matrix , 1991 .

[17]  Ulli Wolff,et al.  How to calculate the elastic scattering matrix in two-dimensional quantum field theories by numerical simulation , 1990 .

[18]  C. Michael.  Adjoint sources in lattice gauge theory , 1985 .

[19]  P. Weisz,et al.  On-shell improved lattice gauge theories , 1985 .