Cutoff effects for Wilson twisted mass fermions at tree-level of perturbation theory
نویسنده
چکیده
K. CichyP, J. González López∗BZ, K. JansenZ, A. KujawaP and A. ShindlerN BHumboldt–Universität zu Berlin, Institut für Physik, Newtonstrasse 15, 12489 Berlin, Germany PAdam Mickiewicz University of Poznan, Faculty of Physics, Umultowska 85, 61-614 Poznan, Poland ZDESY, Platanenallee 6, 15738 Zeuthen, Germany NNIC, Platanenallee 6, 15738 Zeuthen, Germany E-mail: [email protected], [email protected] [email protected], [email protected], [email protected]
منابع مشابه
Non-perturbative improvement of nHYP smeared Wilson fermions
Using Schrödinger functional techniques, we determine the coefficient of the clover term necessary for non-perturbative O(a) improvement of hypercubic smeared Wilson fermions on a quenched plaquette action background. Unlike for unsmeared Wilson fermions, the resulting clover coefficients are close to the tree–level value even at coarse lattice spacings, indicating the absence of large cutoff e...
متن کاملExploring twisted mass Lattice QCD with the Clover term
It has been shown that in the twisted mass formulation of Lattice QCD at maximal twist large cutoff effects are generated when the quark mass becomes of O(aΛQCD). In general, these effects can be suppressed in two ways: either by choosing the critical quark mass in an “optimal way”, or by adding the Clover term to the twisted action. We investigate the second option by performing a quenched lat...
متن کاملLarge cutoff effects of dynamical Wilson fermions ∗
We present and discuss results for cutoff effects in the PCAC masses and the mass dependence of r0 for full QCD and various fermion actions. Our discussion of how one computes mass dependences – here of r0 – is also relevant for comparisons with chiral perturbation theory.
متن کاملLight quarks with twisted mass fermions
We investigate Wilson twisted mass fermions in the quenched approximation using different definitions of the critical bare quark mass mc to realize maximal twist and, correspondingly, automatic O(a) improvement for physical observables. A particular definition of mc is given by extrapolating the value of mc obtained from the PCAC relation at non-vanishing bare twisted quark mass μ to μ = 0. Emp...
متن کاملCutoff effects in maximally twisted LQCD
The Symanzik analysis of correlators in lattice QCD with maximally twisted Wilson fermions reveals that there exist cutoff artifacts which tend to become large as the quark mass gets small. We show that these effects can be reduced to a negligible level by either introducing the clover term in the action or, as already suggested in the literature, by a suitable choice of the critical mass. Rece...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007