Experimental data on K+ meson and proton sideward flow measured with the FOPI detector at SIS/GSI in the reactions Ru + Ru at 1.69A GeV and Ni + Ni at 1.93 A GeV are presented. The K+ sideward flow is found to be anti-correlated (correlated) with the one of protons at low (high) transverse momenta. When compared to the predictions of a transport model, the data favour the existence of an in-medium repulsive K+-nucleon potential. (C) 2000 Elsevier Science B.V.
|Number of pages
|Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
|Published - 2000 Jul 27
Bibliographical noteFunding Information:
We gratefully acknowledge E.L. Bratkovskaya and W. Cassing for providing us the RBUU calculations and for fruitful discussions. This work was supported by the agreement between GSI and IN2P3/CEA and by the PROCOPE-Program of the DAAD. The BMBF supplied support under the contracts RUM-005-95, POL-119-95, UNG-021-96 and RUS-676-98, the DFG within the projects 436 RUS-113/143/2 and 446 KOR-113/76/0. Support has been received from the Polish KBN under grant 2P302-011-04, from the Korean KOSEF under grant 985-0200-004-2, from the Hungarian OMFB under contract D-86/96 and from the Hungarian OTKA under grant T029379.
ASJC Scopus subject areas
- Nuclear and High Energy Physics