Hadronic contribution to g-2 from twisted mass fermions

Details Hadronic contribution to g-2 from twisted mass fermions Hadronic contribution to g-2 from twisted mass fermions

2009-02-16

arxiv.org/abs/0902.2796v1

PoS LATTICE2008:129,2008

Physics

High Energy Physics

High Energy Physics - Lattice

talk presented at the XXVI International Symposium on Lattice Field Theory, July 14-19, 2008, Williamsburg, Virginia, USA

Scientific paper

We calculate the vacuum polarization tensor for pion masses from 480 MeV to 270 MeV using dynamical twisted mass fermions at a lattice spacing of 0.086 fm. We analyze the form of the polarization tensor on the lattice using the symmetries of twisted QCD and we study both finite size effects and lattice artifacts at a pion mass of 310 MeV. Results for the lowest order hadronic contribution to g-2 are presented and the impact of systematic errors is discussed.

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