2006/05/07 by The BABAR Collaboration, B. Aubert, R. Barate +98 · 84 citations
Mathematics · Physics and Astronomy · #Algorithm #Collider #High-Energy Particle Collisions Research #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.74.012002
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 74(1) (American Physical Society) · 15 pages, 22 postscript figues, submitted to Phys. Rev. D
arxiv created 2006/05/07 · openalex publication_date 2006/07/10 · arxiv updated 2010/03/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We report a study of the processes e+e^\ensuremath-\ensuremath→\ensuremathη\ensuremathγ and e+e^\ensuremath-\ensuremath→\ensuremathη^\ensuremath'\ensuremathγ at a center-of-mass energy of 10.58 GeV, using a 232 fb^\ensuremath-1 data sample collected with the BABAR detector at the PEP-II collider at SLAC. We observe 20_\ensuremath-5+6\ensuremathη\ensuremathγ and 50_\ensuremath-7+8\ensuremathη^\ensuremath'\ensuremathγ events over small backgrounds, and measure the cross sections \ensuremathσ(e+e^\ensuremath-\ensuremath→\ensuremathη\ensuremathγ)=4.5_\ensuremath-1.1+1.2\ifmmode±\else\textpm\fi0.3 fb and \ensuremathσ(e+e^\ensuremath-\ensuremath→\ensuremathη^\ensuremath'\ensuremathγ)=5.4\ifmmode±\else\textpm\fi0.8\ifmmode±\else\textpm\fi0.3 fb. The corresponding transition form factors at q2=112 GeV2 are q2|F_\ensuremathη(q2)|=0.229\ifmmode±\else\textpm\fi0.030\ifmmode±\else\textpm\fi0.008 GeV, and q2|F_\ensuremathη^\ensuremath'(q2)|=0.251\ifmmode±\else\textpm\fi0.019\ifmmode±\else\textpm\fi0.008 GeV, respectively.