Probing the antikaon potential by K$^$A elastic scattering
Abstract
We extract the antikaon potential from differential data on elastic $K^A$ scattering within Glauber theory at an antikaon momentum of 800 MeV/c. The $K^N$ cross section at densities up to 0.1 $fm^3$ is found to be close to the value given in free space $K^p$ and $K^n$ interactions (averaged over the number of protons and neutrons) whereas the ratio $\alpha$ of the real to imaginary part of the forward scattering amplitude $f(0)$ differs from the ratio $\alpha$ in free space indicating a dropping of $Re f(0)$ at finite nuclear density. The extrapolated $K^$ potential at a momentum of 0.8 GeV/c amounts to $\approx $28 MeV at density $\rho_0$ which is substantially less than the values extracted from kaonic atoms at zero momentum or heavyion data at 300 MeV/c${\leq}p_K{\leq}$600 MeV/c. We, furthermore, investigate the perspectives of scattering experiments on $^{12}C$ at low ($\approx$300 MeV/c) and high ($\approx$1.2 GeV/c) momenta.
 Publication:

arXiv eprints
 Pub Date:
 September 1999
 arXiv:
 arXiv:nuclth/9909053
 Bibcode:
 1999nucl.th...9053S
 Keywords:

 Nuclear Theory
 EPrint:
 11 pages, revtex, including 14 psfigures