English

Study of e+e- --> Lambda anti-Lambda, Lambda anti-Sigma0, Sigma0 anti-Sigma0 using Initial State Radiation with BABAR

High Energy Physics - Experiment 2010-04-12 v1
Authors: The BABAR Collaboration , B. Aubert
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Abstract

We study the e+e- --> Lambda anti-Lambda gamma, Lambda anti-Sigma0 gamma, Sigma0 anti-Sigma0 gamma processes using 230 fb-1 of integrated luminosity collected by the BABAR detector at e+e- center-of-mass energy of 10.58 GeV. From the analysis of the baryon-antibaryon mass spectra the cross sections for e+e- --> Lambda anti-Lambda, Lambda anti-Sigma0, Sigma0 anti-Sigma0 are measured in the dibaryon mass range from threshold up to 3 GeV/c^2. The ratio of electric and magnetic form factors, |G_E/G_M|, is measured for e+e- --> Lambda anti-Lambda, and limits on the relative phase between Lambda form factors are obtained. We also measure the J/psi --> Lambda anti-Lambda, Sigma0 anti-Sigma0 and psi(2S) --> Lambda anti-Lambda branching fractions.

Keywords

electron-positron annihilation cross sections lambda(1405) resonance photoproduction b meson physics

Cite

@article{arxiv.0709.1988,
  title  = {Study of e+e- --> Lambda anti-Lambda, Lambda anti-Sigma0, Sigma0 anti-Sigma0 using Initial State Radiation with BABAR},
  author = {The BABAR Collaboration and B. Aubert},
  journal= {arXiv preprint arXiv:0709.1988},
  year   = {2010}
}

Comments

24 pages, 37 postscript figures, submitted to Phys. Rev. D

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R2 v1 2026-06-21T09:17:01.348Z