PoS - Proceedings of Science
Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - QCD and Hadronic Physics
Recent results on hadronic cross sections measurements at BABAR for the $g - 2$ calculation
V. Druzhinin* on behalf of the BABAR collaboration
*corresponding author
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Pre-published on: June 10, 2020
Published on:
Abstract
A program of measuring the light hadrons production in exclusive $e^+e^-\to \rm{hadrons}$ processes is in place at BABAR with the aim to improve the calculation of the hadronic contribution to the muon $g-2$. We present the most recent results obtained by using the full data set of about 470 fb$^{-1}$ collected by the BABAR experiment at the PEP-II $e^+e^-$ collider at a center-of-mass energy of about 10.6~GeV. In particular, we report the results on the channels $e^+e^-\to\pi^+\pi^-\pi^0\pi^0$, $e^+e^-\to\pi^+\pi^-\pi^0\pi^0\pi^0$, $e^+e^-\to\pi^+\pi^-\pi^0\eta$, and $e^+e^-\to\pi^+\pi^-\eta$. The first reaction, in particular, presently gives the main uncertainty on the total hadronic cross section in the energy region between 1 and 2 GeV.
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