Topological susceptibility in 2-flavor lattice QCD with fixed topology

Details Topological susceptibility in 2-flavor lattice QCD with fixed topology Topological susceptibility in 2-flavor lattice QCD with fixed topology

2008-06-11

arxiv.org/abs/0806.1813v1

PoS LAT2007:068,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 3 figures, talk presented at the 25th International Symposium on Lattice Field Theory, Regensburg, Germany, 30 Jul -

Scientific paper

We determine the topological susceptibility $ \chi_t $ in the trivial topological sector generated by lattice simulations of two-flavor QCD with overlap Dirac fermion, on a $16^3 \times 32$ lattice with lattice spacing $\sim$ 0.12 fm, at six sea quark masses $m_q$ ranging from $m_s/6$ to $m_s$ (where $m_s$ is the physical strange quark mass). The $ \chi_t $ is extracted from the plateau (at large time separation) of the time-correlation function of the flavor-singlet pseudoscalar meson ($\eta'$), which arises from the finite size effect due to fixed topology. In the small $m_q$ regime, our result of $\chi_t$ is proportional to $m_q$ as expected from chiral effective theory. Using the formula $\chi_t=m_q\Sigma/N_f$ by Leutwyler-Smilga, we obtain the chiral condensate in $N_f=2$ QCD as $\Sigma^{\bar{\mathrm{MS}}}(\mathrm{2 GeV})=[252(5)(10) \mathrm{MeV}]^3 $, in good agreement with our previous result obtained in the $\epsilon$-regime.

Affiliated with

Also associated with

No associations

Rating

Topological susceptibility in 2-flavor lattice QCD with fixed topology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Topological susceptibility in 2-flavor lattice QCD with fixed topology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Topological susceptibility in 2-flavor lattice QCD with fixed topology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-264816