Published February 1997 | Version v1
Report Metadata-only

Freeze-out time in ultrarelativistic heavy ion collisions from Coulomb effects in transverse pion spectra

Creators

  • 1. Forschungszentrum Rossendorf e.V. (FZR), Dresden (Germany). Inst. fuer Kern- und Hadronenphysik
  • 2. Niels Bohr Inst., Copenhagen (Denmark)
  • 3. Nordisk Inst. for Teoretisk Fysik (NORDITA), Copenhagen (Denmark)

Description

The influence of the nuclear Coulomb field on transverse spectra of π+ and π- measured in Pb+Pb reactions at 158 A GeV has been investigated. Pion trajectories are calculated in the field of an expanding fireball. The observed enhancement of the π-/π+ ratio at small momenta depends on the temperature and transverse expansion velocity of the source, the rapidity distribution of the net positive charge, and mainly the time of the freeze-out. (orig.)

Availability note (English)

Available from FIZ Karlsruhe.

Additional details

Publishing Information

Imprint Pagination
13 p.
Report number
FZR--168(prepr.)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
28054157
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Numerical Data, Non-conventional Literature
Descriptors DEI
BRANCHING RATIO; COULOMB FIELD; EFFECTIVE MASS; LEAD 208 REACTIONS; LEAD 208 TARGET; MASS SPECTRA; NUCLEAR FIREBALL MODEL; PARTICLE PRODUCTION; PARTICLE RAPIDITY; PIONS MINUS; PIONS PLUS; RELATIVISTIC RANGE; TEV RANGE 10-100; THEORETICAL DATA
Descriptors DEC
BOSONS; DATA; ELECTRIC FIELDS; ELEMENTARY PARTICLES; ENERGY RANGE; HADRONS; HEAVY ION REACTIONS; INFORMATION; MASS; MATHEMATICAL MODELS; MESONS; NUCLEAR MODELS; NUCLEAR REACTIONS; NUMERICAL DATA; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS; SPECTRA; TARGETS; TEV RANGE