On the efficiency of stochastic volume sources for the determination of light meson masses

Abstract

We investigate the efficiency of single timeslice stochastic sources for the calculation of light meson masses on the lattice as one varies the quark mass. Simulations are carried out with Nf = 2 flavours of non-perturbatively O(a) improved Wilson fermions for pion masses in the range of 450 - 760 MeV. Results for pseudoscalar and vector meson two-point correlation functions computed using stochastic as well as point sources are presented and compared. At fixed computational cost the stochastic approach reduces the variance considerably in the pseudoscalar channel for all simulated quark masses. The vector channel is more affected by the intrinsic stochastic noise. In order to obtain stable estimates of the statistical errors and a more pronounced plateau for the effective vector meson mass, a relatively large number of stochastic sources must be used.

18 pages, 6 figures

References in corpus (6)

• Electromagnetic form factor of the pion from twisted-mass lattice QCD at Nf=2
• The pion's electromagnetic form factor at small momentum transfer in full lattice QCD
• Use of stochastic sources for the lattice determination of light quark physics
• Form factors in lattice QCD
• Wilson fermions at fine lattice spacings: scale setting, pion form factors and (g-2)_mu
• Calculation of the pion electromagnetic form factor from lattice QCD

Cited by in corpus (1)

• Improved interpolating fields for hadrons at non-vanishing momentum