Nonperturbative renormalisation of composite operators with overlap quarks

J. B. Zhang; D. B. Leinweber; K. F. Liu; A. G. Williams

doi:10.1016/S0920-5632(03)02484-8

Nonperturbative renormalisation of composite operators with overlap quarks

High Energy Physics - Lattice 2010-03-04 v2

Authors: J. B. Zhang , D. B. Leinweber , K. F. Liu , A. G. Williams

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Abstract

We compute non-perturbatively the renormalisation constants of composite operators on a $16^3 \times 32$ lattice with lattice spacing $a$ = 0.093 fm for the overlap fermion action by using the regularisation independent (RI) scheme. The quenched gauge configurations are generated by tadpole improved plaquette plus rectangle action. We test the perturbative continuum relation $Z_A = Z_V$ and $Z_S=Z_P$ and find that they agree well above $\mu$ = 1.6 GeV. We also perform a Renormalisation Group analysis at the next-to-next-to-leading order and convert the renormalisation constants to the $\bar{MS}$ scheme.

Keywords

nonperturbative renormalisation overlap fermion composite operators RI scheme lattice QCD

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@article{arxiv.hep-lat/0311030,
  title  = {Nonperturbative renormalisation of composite operators with overlap quarks},
  author = {J. B. Zhang and D. B. Leinweber and K. F. Liu and A. G. Williams},
  journal= {arXiv preprint arXiv:hep-lat/0311030},
  year   = {2010}
}

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Talk given at LHP2003, Cairns, Australia

Nonperturbative renormalisation of composite operators with overlap quarks

Abstract

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