Electromagnetic vertex function of the pion at T>0
Abstract
The matrix element of the electromagnetic current between pion states is calculated in quenched lattice QCD at a temperature of T=0.93 Tc. The non-perturbatively improved Sheikholeslami Wohlert action is used together with the corresponding mathcal{O}(a) improved vector current. The electromagnetic vertex function is extracted for pion masses down to 360 MeV and momentum transfers Q2≤2.7 GeV2.
- Publication:
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European Physical Journal C
- Pub Date:
- November 2006
- DOI:
- 10.1140/epjc/s10052-006-0018-4
- arXiv:
- arXiv:hep-lat/0512035
- Bibcode:
- 2006EPJC...48..589V
- Keywords:
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- High Energy Physics - Lattice
- E-Print:
- 17 pages, 8 figures