Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Hadron production in e+e- collisions at BABAR and implications for the muon anomalous magnetic moment

Jul 7, 2012, 5:00 PM
Room 217 (Melbourne Convention and Exhibition Centre)

Room 217

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 6. QCD, Jets, Parton Distributions Room 217 - Education & Outreach - QCD, Jet, Parton Distributions - TR15&6


Andreas Hafner (M)Dr Andreas Martin Hafner (Mainz University (DE))


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.

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