Hadron production in S+nucleus collisions at 200 GeV/nucleon
Central collisions between nuclei at relativistic energies form a hot and dense hadronic system over a large volume. Phenomenological models, as well as QCD calculations on the lattice, predict a phase transition in nuclear matter leading to deconfinement, a state of matter in which quarks and gluons are free to move inside the entire volume of the deconfined region. This new state was given the name of Quark Gluon Plasma (QGP). Based on the conjecture that collisions of heavy nuclei at high energies can create the necessary condition of a high energy density thermalized system, a series of experiments were built to search for possible signals of QGP creation. The NA35 collaboration uses a wide acceptance apparatus at the CERN SPS which detects the majority of charged hadrons (h{sup {+-}}), and neutral strange particles produced in reactions of p, {sup 16}O and {sup 32}S projectiles at 60 and 200 GeV/nucleon lab momentum on different targets. It consists of two major tracking devices which provide the momentum measurement of the charged particles: a 2 m long streamer chamber (SC) which is placed inside a 1.5 T vertex magnet, viewed by three cameras, and a 2.5x1.5x1.0 m{sup 3} Time Projection Chamber (TPC). A set of calorimeters was used as the basic trigger device of the experiment, to select central (small impact parameter) collisions. In the data presented here, a calorimeter placed in the beam path selects near head-on collisions, i.e. events where only a small amount of energy (mostly spectator nucleon energy) was detected in an angular acceptance of less than 0.3 degrees around the beam axis. The data sample consists of three systems: S+S, S+Ag and S+Au at 200 GeV/c with trigger cross section of 3, 3.2 and 6% of the total inelastic cross section, respectively.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10148558
- Report Number(s):
- LBL-35295; CONF-940169-4; ON: DE94011344; TRN: AHC29411%%57
- Resource Relation:
- Conference: 10. winter workshop on nuclear dynamics,Snowbird, UT (United States),15-21 Jan 1994; Other Information: PBD: Mar 1994
- Country of Publication:
- United States
- Language:
- English
Similar Records
A experimental research program on chirality at the LHC
Momentum distributions of neutral pions in heavy ion reactions at the CERN-SPS
Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HADRONS
PARTICLE PRODUCTION
QUARK MATTER
DETECTION
SULFUR
SULFUR 32 REACTIONS
SILVER
GOLD 197 TARGET
STRANGE PARTICLES
BAG MODEL
QUANTUM CHROMODYNAMICS
DATA ANALYSIS
BARYONS
FINAL-STATE INTERACTIONS
NUCLEAR REACTION KINETICS
ENERGY DEPOSITION
EXPERIMENTAL DATA
662230
663450
663530
663560
663590
HEAVY-ION-INDUCED REACTIONS AND SCATTERING
A = 20-38
A = 90-149
A = 220 AND ABOVE