Bottomonium Results from BABAR and BELLE

نویسنده

  • Jörg Marks
چکیده

After nine years of operation the BABAR experiment at the B factory PEPII (Standford Linear Accelerator Center) stopped data taking in April 2008. The last three month of data taking were devoted to ee collisions at center of mass energies of the Υ(2S), Υ(3S) and to an energy scan above the Υ(4S). Besides the observation of the bottomonium ground state ηb, the center of mass energy dependent ee → bb̄ cross section was measured in the energy range from 10.54 to 11.20 GeV. BELLE observed an enhancement in the production cross section for ee → Υ(nS)ππ → μμππ in an energy scan from 10.83 to 11.02 GeV.

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تاریخ انتشار 2009