Hadron spectrum in QCD at <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mfrac><mrow><mn>6</mn></mrow><mrow><mrow><msup><mrow><mi>g</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow><mo>=</mo><mn>5.6</mn><mn></mn></mrow></mfrac></math></span>

Khalil M. Bitar; R. Edwards; U. M. Heller; A. D. Kennedy; Weiqiang Liu; Thomas A. DeGrand; Steven Gottlieb; A. Krasnitz; J. B. Kogut; R. L. Renken; Michael C. Ogilvie; Pietro Rossi; D. K. Sinclair; K. C. Wang; R. L. Sugar; Michael Teper; D. Toussaint

doi:10.1103/PhysRevD.42.3794

Hadron spectrum in QCD at $\frac{6}{g^{2} = 5.6}$

Khalil M. Bitar, R. Edwards, U. M. Heller, A. D. Kennedy, Weiqiang Liu, Thomas A. DeGrand, Steven Gottlieb, A. Krasnitz, J. B. Kogut, R. L. Renken, Michael C. Ogilvie, Pietro Rossi, D. K. Sinclair, K. C. Wang, R. L. Sugar, Michael Teper, and D. Toussaint

Phys. Rev. D 42, 3794 – Published 1 December 1990

Abstract

We have carried out a simulation of QCD using the hybrid-molecular-dynamics algorithm with two flavors of staggered quarks. The spectrum was calculated for $\frac{6}{g^{2} = 5.6}$ and dynamical quark masses ${am}_{q} = 0.025 and 0.01$ . Lattice sizes of $12^{4}$ , $12^{3}$ ×24, and $16^{4}$ were used to generate the gauge configurations. Hadron propagators were calculated with both staggered and Wilson quarks on doubled or quadrupled latices. Finite-size effects are visible on the smaller lattices. Some improvement in the $ρ$ -to-nucleon mass ratio and chiral symmetry is seen as compared to previous calculations, but, as in most lattice calculations, the proton-to- $ρ$ mass ratio remains larger than in the real world and the proton- $Δ$ splitting is too small.