Speakers
Andreas Hafner
(M)Dr
Andreas Martin Hafner
(Mainz University (DE))
Description
The BABAR Collaboration has an intensive program of studying hadronic cross sections at low-energy e+e- collisions, accessible at BaBar via initial-state radiation. Our measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. These improvements are necessary for shedding light on the current ~3.5 sigma difference between the predicted and the experimental values. We have published results on a number of processes with two to six hadrons in the final state. We report here the results of recent studies with the final states 2(pi+pi-), K+K-pi+pi-, K+K-pi0pi0, and 2(K+K-), which constitute the main contribution to the hadronic cross section in the energy region between 1 and 3 GeV. We also report measurements of inclusive hadron production cross sections and angular distributions in e+e- collisions at around 10 GeV. These measurements shed light on fundamental questions of hadronization and fragmentation processes and help test cross-section scaling properties.
Authors
(A. Soffer) babar collaboration
(SLAC)
Dr
Andreas Martin Hafner
(Mainz University (DE))
