Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 32: Hadron Structure and Spectroscopy V

HK 32.7: Vortrag

Mittwoch, 16. März 2016, 15:45–16:00, S1/01 A4

Feasibility study of the p p → D_s⁻ D_s0^*(2317) process with PANDA — •Elisabetta Prencipe¹, Albrecht Gillitzer¹, James Ritman¹, and Klaus Goetzen² — ¹Forschungszentrum Jülich IKP1, Jülich (DE) — ²GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (DE)

Charm spectroscopy has recently gained renewed attention, due to confirmations and new observations published by LHCb. Despite of the excellent performance of the CERN experiments, still limitations exist, that do not allow to perform the measurement of the width (Γ) of narrow states with Γ ≤ 1 MeV. The measurement of the D_s0^*(2317) and the D_s1(2460) width is a crucial point to discriminate among theoretical models, and to reveal their nature. One of the major advantage of the future PANDA experiment at FAIR is the excellent momentum beam resolution of about Δ p / p=5×10⁻⁵, allowing energy scans with an energy resolution down to Δ E ≈ 26 keV. We present a method to measure the width of the D_s0^*(2317), and for the first time a complete full simulation performed with PandaRoot is shown. Feasibility studies for assumption of different signal cross sections are shown, to accommodate the incomplete experimental and theoretical knowledge of the corresponding process of interest. A proposal for a threshold scan for the production reaction p p → D_s⁻ D_s0^*(2317)⁺ in 100-keV-steps is presented, together with an estimate of the competitiveness of PANDA in this field, assuming an average luminosity of L=10³¹ cm⁻¹s⁻¹.