The WA97 and NA57 experiments


Study of strange and multi-strange baryon production in lead-lead collisions


Experiment information:

Introduction and physics motivation
Specifications of the experiment
Layouts and photos
Experimental measurements

NA57 Contacts:

Federico Antinori
Contact person:
Vito Manzari
Contact person:
Emanuele Quercigh
Institute list
Author list


CERN for the general public
An introduction to heavy-ion collisions from the ALICE pages
The ALICE experiment

Sulphur beam experiments:


Main experimental results:

Strangeness enhancement grows with the strangeness of the produced hadron.
Up to a factor 20 for the Omega baryons!

Click on pictures to obtain bigger version with more detailed information (including numerical values)


Strangeness enhancements

Production of particles carrying 1, 2 and 3 units of strangeness is measured as a function of event centrality.

Energy dependence

NA57 Λ, Ξ and Ω yields measured at 40 A GeV/c and 160 A GeV/c lead-lead interactions.

Nuclear modification factors

Nuclear modification factors is an efficient way to display distinctions between nuclear medium effects and plain superpositions of nucleon-nucleon collisions.
  Please see the publications page for our most recent results
  Publications Internal pages (password protected)

Last updated 01/09/2006 by Håvard Helstrup