[Triumf-seminars] TRIUMF Seminar today at 14:00

postmaster at admin.triumf.ca postmaster at admin.triumf.ca
Thu May 3 05:00:00 PDT 2007

Date/Time: Thu 2007-05-03 at 14:00

Location:  Auditorium          

Speaker:   Aron Bernstein (MIT)

Title:     Measurement of the pi0 Lifetime: Testing the QCD Axial Anomaly

Abstract: The pi0 lifetime has been measured with significantly improved accuracy at Jefferson Lab using the Primakoff effect. This was achieved by careful control of all of the experimental parameters and included auxiliary measurements of the Compton effect and pair production. This measurement is a test of a  prediction based on the QCD axial anomaly plus few percent chiral corrections which are proportional to the mass difference of the up and down quarks. The basic physics, and a comparison of theory and experiment, will be presented in the context of spontaneous chiral symmetry breaking in QCD, some of its physical consequences, and other experimental tests.

Stimulants available 15 minutes before the talk.


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