PrimEx Note 59 has been posted at http://www.jlab.org/primex/primex_notes/primex_notes.html Lifetime Measurement of the pi0 Meson and the QCD Chiral Anomaly (from proceedings of Chiral Dynamics '09) A. M. Bernstein July 6, 2009 PDF file: http://www.jlab.org/primex/primex_notes/AB-CD09.pdf