arXiv subjects

Thorsten Struckmann

Publications and source records attributed to Thorsten Struckmann.

2 recordsLinked to original sources

arXiv2001

Quark mass effects on the topological susceptibility in QCD

We investigate topology in lattice simulations of QCD with two flavours of dynamical Wilson fermions. At various sea quark masses we find reasonable agreement between results for the topological charge from fermionic and gluonic definitions, the latter with cooling. We study correlations of the topological charge with light hadronic observables and find effects in the flavour singlet pseudoscalar channel. The quark mass dependence of the topological susceptibility, $χ$, is in agreement with the leading order small m_pi expectation, chi=(f_pi m_pi)^2/4.

hep-lat↗

arXiv2000

Static potentials and glueball masses from QCD simulations with Wilson sea quarks

We calculate glueball and torelon masses as well as the lowest lying hybrid potential in addition to the static ground state potential in lattice simulations of QCD with two flavours of dynamical Wilson fermions. The results are obtained on lattices with $16^3\times 32$ and $24^3\times 40$ sites at $β=5.6$, corresponding to a lattice spacing, $a^{-1}=2.65^{+5}_{-8}$ GeV, as determined from the Sommer force radius, at physical sea quark mass. The range spanned in the present study of five different quark masses is reflected in the ratios, $0.83\geq m_π/m_ρ\geq 0.57$.

hep-lat↗