Study of e+e-→ΛΛ¯, ΛΣ¯0, Σ0Σ¯0 using initial state radiation with BABAR
Abstract
We study the e+e-→ΛΛ¯γ, ΛΣ¯0γ, Σ0Σ¯0γ processes using 230fb-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-→ΛΛ¯, ΛΣ¯0, Σ0Σ¯0 are measured in the dibaryon mass range from threshold up to 3GeV/c2. The ratio of electric and magnetic form factors, |GE/GM|, is measured for e+e-→ΛΛ¯, and limits on the relative phase between Λ form factors are obtained. We also measure the J/ψ→ΛΛ¯, Σ0Σ¯0, and ψ(2S)→ΛΛ¯ branching fractions.
- Publication:
-
Physical Review D
- Pub Date:
- November 2007
- DOI:
- 10.1103/PhysRevD.76.092006
- arXiv:
- arXiv:0709.1988
- Bibcode:
- 2007PhRvD..76i2006A
- Keywords:
-
- 13.66.Bc;
- 13.25.Gv;
- 13.40.Gp;
- 14.20.Jn;
- Hadron production in e<sup>-</sup>e<sup>+</sup> interactions;
- Decays of J/psi Upsilon and other quarkonia;
- Electromagnetic form factors;
- Hyperons;
- High Energy Physics - Experiment
- E-Print:
- 24 pages, 37 postscript figures, submitted to Phys. Rev. D