2012/01/31 by J. P. Lees, V. Poireau, V. Tisserand +393 · 41 citations
Mathematics · Physics and Astronomy · #Atomic physics #Electron–positron annihilation #Energy (signal processing) #Geometry #Hadron #High-Energy Particle Collisions Research #Mathematics #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Photon #Photon energy #Physics #Pi #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Radiative transfer #Sigma #hep-ex
paper · pdf · doi:10.1103/physrevd.85.112009
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 85(11) (American Physical Society)
openalex publication_date 2012/06/21 · arxiv created 2012/08/27 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We study the process e+e^\ensuremath-\ensuremath→\ensuremathπ+\ensuremathπ^\ensuremath-\ensuremathπ+\ensuremathπ^\ensuremath-\ensuremathγ, with a photon emitted from the initial-state electron or positron, using 454.3 fb^\ensuremath-1 of data collected with the BABAR detector at SLAC, corresponding to approximately 260 000 signal events. We use these data to extract the nonradiative \ensuremathσ(e+e^\ensuremath-\ensuremath→\ensuremathπ+\ensuremathπ^\ensuremath-\ensuremathπ+\ensuremathπ^\ensuremath-) cross section in the energy range from 0.6 to 4.5 GeV. The total uncertainty of the cross section measurement in the peak region is less than 3%, higher in precision than the corresponding results obtained from energy scan data.