Mass dependence of light nucleus production in ultrarelativistic heavy ion collisions

Details Mass dependence of light nucleus production in ultrarelativistic heavy ion collisions Mass dependence of light nucleus production in ultrarelativistic heavy ion collisions

1999-07-05

arxiv.org/abs/nucl-ex/9907002v2

Phys.Rev.Lett.83:5431-5434,1999

Physics

Nuclear Physics

Nuclear Experiment

(6 pages, 3 figures), some changes on text, references and figures' lettering. To be published in PRL (13Dec1999)

Scientific paper

10.1103/PhysRevLett.83.5431

Light nuclei can be produced in the central reaction zone via coalescence in relativistic heavy ion collisions. E864 at BNL has measured the production of ten light nuclei with nuclear number of A=1 to A=7 at rapidity $y\simeq1.9$ and $p_{T}/A\leq300MeV/c$. Data were taken with a Au beam of momentum of 11.5 A $GeV/c$ on a Pb or Pt target with different experimental settings. The invariant yields show a striking exponential dependence on nuclear number with a penalty factor of about 50 per additional nucleon. Detailed analysis reveals that the production may depend on the spin factor of the nucleus and the nuclear binding energy as well.

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