Renormalization constants of local operators for Wilson type improved fermions

Details Renormalization constants of local operators for Wilson type improved fermions Renormalization constants of local operators for Wilson type improved fermions

2012-01-24

arxiv.org/abs/1201.5025v1

Physics

High Energy Physics

High Energy Physics - Lattice

36 pages, 11 figures and 6 tables. The results are included in electronic form (Mathematica files)

Scientific paper

Perturbative and non-perturbative results are presented on the renormalization constants of the quark field and the vector, axial-vector, pseudoscalar, scalar and tensor currents. The perturbative computation, carried out at one-loop level and up to second order in the lattice spacing, is performed for a fermion action, which includes the clover term and the twisted mass parameter yielding results that are applicable for unimproved Wilson fermions, as well as for improved clover and twisted mass fermions. We consider ten variants of the Symanzik improved gauge action corresponding to ten different values of the plaquette coefficients. Non-perturbative results are obtained using the twisted mass Wilson fermion formulation employing two degenerate dynamical quarks and the tree-level Symanzik improved gluon action. The simulations are performed for pion masses in the range of 480 MeV to 260 MeV and at three values of the lattice spacing, a, corresponding to beta=3.9, 4.05, 4.20. For each renormalization factor computed non-perturbatively we subtract its perturbative O(a^2) terms so that we eliminate part of the cut-off artifacts. The renormalization constants are converted to MS-bar at a scale of mu=2 GeV. The perturbative results depend on a large number of parameters and are made easily accessible to the reader by including them in the distribution package of this paper, as a Mathematica input file.

Affiliated with

Also associated with

No associations

Rating

Renormalization constants of local operators for Wilson type improved fermions 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 Renormalization constants of local operators for Wilson type improved fermions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Renormalization constants of local operators for Wilson type improved fermions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-107316