Prize Recipient

Recipient Picture

Gail G. Hanson
Indiana University


"Gail Hanson and Roy Schwitters are honored for their separate contributions which together provided the first clear evidence that hadronic final states in e+e? annihilation, which are largely composed of spin 0 and spin 1 particles, originate from the fragmentation of spin 1/2 quarks. Gail Hanson observed hadron jets and determined the jet axis by developing and applying the spheric-ity analysis to the hadrons in e+ e? events. She showed that events become more jet?like with increasing energy, contrary to what one expects from a simple phase space production mechanism. Using the beam polarization, she showed that the observed azimuthal distribution of the jet axis was that expected from the production of spin 1/2 quarks that fragment into hadrons."


Hanson received her Ph.D. from MIT in 1973 and joined the Stanford Linear Accelerator Center as a research associate, eventually becoming a permanent member of the research staff. She left SLAC in 1989 to become a professor of physics at Indiana University. A fellow of both the APS and AAPT, she has served on numerous advisory committees, including the HEPAP Subpanel on High Energy Physics.