Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 43: Hadronenstruktur und -spektroskopie VIII
HK 43.2: Vortrag
Mittwoch, 23. März 2011, 16:45–17:00, HS3
Ks0 Production in p+p and p+Nb Reactions at 3.5 GeV with HADES — •Jia-Chii Chen — Excellence Cluster “Universe”, TU München, Boltzmannstr. 2, 85748 Garching, Germany
Recent results on the kaon-nucleon (KN) interaction have pointed out a repulsive in-medium potential of kaons
at normal nuclear density. Nevertheless different values of the KN potential were obtained varying from
20±5 MeV [1] to ∼39 MeV [2]. To contribute to the understanding of the KN potential the Ks0 meson
production was investigated for p+p and p+Nb reactions measured at a kinetic beam energy of 3.5 GeV with the
HADES set-up (GSI, Darmstadt). An overall statistics of 1.2·109 and
4.2·109 events has been collected respectively. A comparison of the measured Ks0
transverse momentum spectra from p+p and p+Nb reactions provides information about possible effects caused by the
Ks0 potential in cold nuclear matter. In particular, the high statistics collected in the low-momentum region down
to 30 MeV/c is fundamental to unravel the effects of the potential.
The main steps of the inclusive analysis will be discussed and transverse momentum as well as transverse mass spectra
will be presented for both reactions.
[ 1] M.L. Benabderrahmane et al. (FOPI), Phys. Rev. Lett. 102, 182501 (2009)
[ 2] G. Agakishiev et al. (HADES), Phys. Rev. C 82:044907 (2010)