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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Hadronenstruktur und -spektroskopie

HK 53.3: Talk

Friday, March 21, 2014, 11:45–12:00, HZ 3

Λ_c⁺ production in antiproton-proton annihilation within an effectiveLagrangian model — •Radhey Shyam¹ und Horst Lenske² — ¹Institut für Theoretische Physik,Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen and Saha Institute of Nuclear Physics,Kolkata, India — ²Institut für Theoretische Physik,Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen

Using effective hadronic Lagangians with physical hadron masses and coupling constants determined from SU(4) flavor symmetry, we study the production cross sections of charmed baryon Λ_c⁺ in the p p → Λ_c Λ_c⁺ reaction. The production mechanism is described by the t-channel meson exchange diagrams involving the excahnge of D⁰ and D^* mesons. At the ND⁰Λ_c and ND^*Λ_c vertices several types of form factors have been used and sensitivity of the production cross sections to their form and the cut-off parameters appearing therein have been investigated. With a monopole form factor and a cut-off parameter of 2.5 GeV, our cross sections are of the same order of magnitude as those obtained in Ref. [1].

This work has been supported by DFG Le439/8-2 and HIC for FAIR.

[1] J. Haidenbauer and G. Krein, Phys. Lett. B 687, 314 (2010).