Berlin 2005 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 2: Elektromagnetische und Hadronische Proben

HK 2.2: Talk

Friday, March 4, 2005, 14:30–14:45, TU MA001

Kaonic hydrogen and K⁻ p scattering — •B. Borasoy¹, R. Nißler¹, and W. Weise² — ¹Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, Germany — ²Physik Department, Technische Universität München, Germany

We present a novel analysis of K⁻ p scattering data and the strong interaction shift and width in kaonic hydrogen in view of the new accurate DEAR measurements [1] by employing a relativistic chiral SU(3) approach of effective field theory with coupled channels [2]. Questions of consistency between the various data sets are examined and the importance of the constraints set by the precise DEAR experiment is emphasized. Coulomb and isospin breaking effects turn out to be important and are both taken into account.

Financial support of the DFG and BMBF is gratefully acknowledged.

• [1] M. Cargnelli et al. (DEAR collaboration), Proceedings of
    "8th International Workshop on Meson Production, Properties
    and Interaction (MESON 2004)”, Kraków, Poland, June 2004.
• [2] B. Borasoy, R. Nißler and W. Weise, hep-ph/0410305.