Scalar meson in dynamical and partially quenched two-flavor QCD: lattice results and chiral loops

Details Scalar meson in dynamical and partially quenched two-flavor QCD: lattice results and chiral loops Scalar meson in dynamical and partially quenched two-flavor QCD: lattice results and chiral loops

2004-07-29

arxiv.org/abs/hep-lat/0407037v1

Phys.Rev.D70:094503,2004

Physics

High Energy Physics

High Energy Physics - Lattice

23 pages, 8 figures

Scientific paper

10.1103/PhysRevD.70.094503

This is an exploratory study of the lightest non-singlet scalar $q\bar q$ state on the lattice with two dynamical quarks. Domain Wall fermions are used for both sea and valence quarks on a 16^3*32 lattice with an inverse lattice spacing of 1.7 GeV. We extract the scalar meson mass 1.58(34) GeV from the exponential time-dependence of the dynamical correlators with $m_{val}=m_{sea}$ and N_f=2. Since this statistical error-bar from dynamical correlators is rather large, we analyze also the partially quenched lattice correlators with $m_{val}$ not equal $m_{sea}$. They are positive for $m_{val}>=m_{sea}$ and negative for $m_{val}=m_{sea}$ and negative for $m_{val}

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