Second moment of the pion's distribution amplitude

Details Second moment of the pion's distribution amplitude Second moment of the pion's distribution amplitude

2005-10-19

arxiv.org/abs/hep-lat/0510089v1

Nucl.Phys.Proc.Suppl.161:69-74,2006

Physics

High Energy Physics

High Energy Physics - Lattice

6 pages, 5 figures, 1 table. To appear in: Procs. of the Workshop on Light-Cone QCD and Nonperturbative Hadron Physics 2005 (L

Scientific paper

10.1016/j.nuclphysbps.2006.08.06

We present preliminary results from the QCDSF/UKQCD collaborations for the second moment of the pion's distribution amplitude with two flavours of dynamical fermions. We use nonperturbatively determined renormalisation coefficients to convert our results to the MSbar scheme at 5 GeV^2. Employing a linear chiral extrapolation from our large pion masses >550 MeV, we find =0.281(28), leading to a value of a_2=0.236(82) for the second Gegenbauer moment.

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