Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2011-10-27
Physics
High Energy Physics
High Energy Physics - Lattice
1 figure and clarifying remarks added, results and conclusion unchanged. Accepted for publication in Physics Letters B
Scientific paper
We address a long standing problem regarding topology in lattice simulations of QCD with unimproved Wilson fermions. Earlier attempt with unimproved Wilson fermions at \beta =5.6 to verify the suppression of topological susceptibility with decreasing quark mass (m_q) was unable to unambiguously confirm the suppression. We carry out systematic calculations for two degenerate flavours at two different lattice spacings (\beta = 5.6 and 5.8). The effects of quark mass, lattice volume and the lattice spacing on the spanning of different topological sectors are presented. We unambiguously demonstrate the suppression of the topological susceptibility with decreasing quark mass, expected from chiral Ward identity and chiral perturbation theory.
Chowdhury Abhishek
De Asit K.
Harindranath Avaroth
Maiti Jyotirmoy
Mondal Santanu
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