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Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 61: Hadronenstruktur und -spektroskopie

HK 61.3: Talk

Thursday, March 7, 2013, 14:45–15:00, HSZ-105

Measurement of the hadronic cross section e+e- to pi+pi-pi0pi0 at BES-III — •Martin Ripka — Kernphysik Uni Mainz

Experimental and theoretical values of the muon anomalous magnetic moment presently show a deviation of more than 3 standard deviations. While the electromagnetic and the weak contributions to its theoretical value are well under control, the QCD contributions have to be obtained from data. Experimental measurements of hadronic cross sections can indeed be used to determine the QCD loop contributions using the optical theorem. This talk is about the contribution of the 2pi2pi0 ISR channel using ISR data from the BESIII experiment in Beijing/China. Preliminary results of the simulated cross section will be shown.

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