Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Postersitzung

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+ed+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.

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