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T: Fachverband Teilchenphysik

T 69: Flavour (Theorie/Experiment) 1

T 69.3: Talk

Tuesday, March 25, 2014, 17:15–17:30, GFH 01-701

Search for exotic charmonium-like states in B_s decays at the Belle experiment — •Leonard Koch, Wolfgang Kühn, Sören Lange, and Milan Wagner for the Belle collaboration — II physikalisches Institut JLU Gießen

B_s decays are well suited for the search for tetraquark candidates in the charmonium mass region, which may contain a strange quark. We are searching for charged [J/ ψ K^±] states in the decay B_s→ J/ ψ K⁺ K⁻ π⁺ π⁻ in a data set of 121.1  fb⁻¹ recorded at √s=10.86  GeV at the Belle experiment, corresponding to 37× 10⁶ Υ(5S) decays. The different steps of the analysis will be presented.