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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Hadronenstruktur und -spektroskopie II

HK 5.7: Vortrag

Montag, 21. März 2011, 15:45–16:00, HS3

Study of Ψ(2S) and Ψ(3770) decays into pp related channels — •yutie liang, martin galuska, ingo heller, wolfgang kühn, jens sören lange, björn spruck, matthias ullrich, and marcel werner — II. Physikalisches Institut, Universität Gießen, Germany

Since 2009, the BESIII detector at BEPCII/Beijing has taken over 100M Ψ(2S) events and over 900pb⁻¹ Ψ(3770) data. This is so far the largest amount of electron collider data on charmonia and provide the opportunity for high precise measurements. In this talk, two analyzes will be presented. The first one is the partial wave analysis of Ψ(2S) → ppπ⁰. This channel is expected to be dominated by 2-body decays involving excited nucleon states which play an important role in the understanding of nonperturbative QCD. The other one is the measurement of Ψ(3770)→ pp. This measurement could be used to estimate the cross section of pp → Ψ(3770) which is important for the PANDA experiment.

^* This work was supported in part by BMBF (06GI9107I) and the LOEWE-Zentrum HICforFAIR.