The match is pretty good
|
| Shown here are preliminary data from NA44 (black dots with error bars).
These are pi+ data, and below are the equivalent plots for K+ and p, and for
the proton dn/dy. All data sets, as well as pi+ HBT data, were fed into the
Nix-Chapman model. The program then optimized a global fit in terms of
fundamental parameters (Temperature, flow, chemical potentials etc), and from
these parameters in turn the spectra were calculated, and plotted as open
circles.
The match is pretty good
|
| postscript version of K+ |
| postscript version of protons |
| The two left data points with error bars are measured, the two other points are reflected w.r.t. mid-rapidity. The solid line is Nix-Chapman. |
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