ar X iv : h ep - l at / 0 41 00 06 v 1 5 O ct 2 00 4 The pion form factor on the lattice at zero and finite temperature

نویسندگان

  • J. van der Heide
  • J. H. Koch
  • E. Laermann
چکیده

We calculate the electromagnetic form factor of the pion in quenched lattice QCD. The non-perturbatively improved Sheikoleslami-Wohlert lattice action is used together with the consistently O(a) improved current. We calculate the pion form factor for masses down to mπ = 360 M eV , extract the charge radius, and extrapolate toward the physical pion mass. In the second part, we discuss results for the pion form factor and charge radius at 0.93 Tc and compare with zero temperature results.

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تاریخ انتشار 2004