Electromagnetic vertex function of the pion at T > 0

Details Electromagnetic vertex function of the pion at T > 0 Electromagnetic vertex function of the pion at T > 0

2005-12-23

arxiv.org/abs/hep-lat/0512035v1

Eur.Phys.J.C48:589-596,2006

Physics

High Energy Physics

High Energy Physics - Lattice

17 pages, 8 figures

Scientific paper

10.1140/epjc/s10052-006-0018-4

The matrix element of the electromagnetic current between pion states is calculated in quenched lattice QCD at a temperature of $T = 0.93 T_c$. The nonperturbatively improved Sheikholeslami-Wohlert action is used together with the corresponding ${\cal O}(a)$ improved vector current. The electromagnetic vertex function is extracted for pion masses down to $360 {\rm MeV}$ and momentum transfers $Q^2 \le 2.7 {\rm GeV}^2$.

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