Bonn 2010 – wissenschaftliches Programm
HK 65.3: Vortrag
Freitag, 19. März 2010, 14:45–15:00, HG IV
Measurement of Hyperon Decays of Charmonia with the BES3 Detector* — •Björn Spruck, Ingo Heller, Jens Sören Lange, Yutie Liang, Wolfgang Kühn, and Qiang Wang — II. Physikalisches Institut, Universität Gießen
Since 2009, the upgraded BES3 detector located at IHEP/Beijing
has taken over 200M J/Ψ and over 100M Ψ(2S) events in
symmetric e+e− collisions at the resonance energies.
This data is so far the largest amount of electron collider data
on charmonia and gives the opportunity to study know decays more
precisely and discover new decay channels.
This talk will be focused on baryon/anti-baryon decays involving
hyperons (Λ, Σ, Ξ and their excited states).
For some of these decays a large SU(3) flavour symmetry
breaking has been observed by other experiments before. The design
of the BES3 detector allows for exclusive reconstruction of these
decays into charged and neutral channels.
Possible implications for measurements at the PANDA experiment will be discussed and
preliminary results on inclusive and exclusive reconstructions will be presented.
* This work was supported by WTZ-CHN(06-20).