Bonn 2010 – wissenschaftliches Programm
HK 36.11: Poster
Mittwoch, 17. März 2010, 14:00–16:00, HG Aula
Study of Anti-Deuterons, Anti-Tritons and Anti-3He at Belle — •Stephanie Künze, Martin Galuska, Thomas Geßler, Wolfgang Kühn, Jens Sören Lange, David Münchow, Diego Semmler, Björn Spruck, Matthias Ullrich, and Marcel Werner — 2. Physikalisches Institut, Universität Gießen
Events of the type e+e−→d+X, t+X, anti-3He+X, are rare events in e+e− collisions as they require the production of several anti-quarks together with their corresponding quarks (6+6 in the deuteron case, 9+9 for triton and 3He). In addition, in order to form a bound state, the anti-quarks must be close in phasespace, so that coalescence (i.e. overlap of the wave functions) can be applied. Preliminary results from Belle at √s≃10.6 GeV with a data set of 589fb−1, using dE/dx in the Belle drift chamber for particle identification, are presented. The momentum distribution of the anti-nuclei can be compared to a fireball model. Preliminary results of the search for anti-4He will also be presented.