Non-perturbative improvement of the axial current for dynamical Wilson fermions | Zendy

Michele Della Morte | Zendy; Roland Hoffmann | Zendy; Rainer Sommer | Zendy

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Non-perturbative improvement of the axial current for dynamical Wilson fermions

Author(s) -

Michele Della Morte,

Roland Hoffmann,

Rainer Sommer

Publication year - 2005

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2005/03/029

Subject(s) - current (fluid) , non perturbative , fermion , physics , mathematical physics , theoretical physics , quantum electrodynamics , statistical physics , quantum mechanics , thermodynamics

A non-perturbative determination of the axial current improvement coefficientcA is performed with two flavors of dynamical improved Wilson fermions andplaquette gauge action. The improvement condition is formulated withSchroedinger functional boundary conditions and enforced at constant physicalvolume. Large sensitivity is obtained by using two different pseudo-scalarstates in the PCAC relation. We estimate the resulting correction to F_PS atbeta=5.2 to be around 10%.Comment: 13 pages, 5 figures, JHEP styl

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