Nonperturbative character of electron-positron pair production in relativistic heavy-ion collisions

Journal Article · Mon May 20 04:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.2613· OSTI ID:5543902

Rumrich, K; Momberger, K; Soff, G; Greiner, W; Gruen, N; Scheid, W ^[1]

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1. Institut fuer Theoretische Physik der Johann Wolfgang Goethe Universitaet, Robert-Mayer-Strasse 8-10, Postfach 111 932, D-6000 Frankfurt am Main, Federal Republic of Germany (DE) Gesellschaft fuer Schwerionenforschung (GSI), Planckstrasse 1, Postfach 110 552, D-6100 Darmstadt, Federal Republic of Germany Institute fuer Theoretische Physik der Justus Liebig Universitaet, Henrich-Buff-Ring 16, D-6300 Giessen, Federal Republic of Germany

Coupled-channel calculations for relativistic heavy-ion collisions are performed in order to determine the electromagnetic electron-positron pair production yeild with subsequent capture of the electron into the {ital K} shell of the target. We consider heavy projectiles impinging on Pb{sup 82+} and U{sup 92+} with small impact parameters at a bombarding energy of 1.2 and 2 GeV/nucleon, respectively. The dependence of the positron yields on the charge number of the projectile exhibits a strong nonperturbative feature. The corresponding result obtained within first-order perturbation theory is exceeded by about 2 orders of magnitude.

• OSTI ID: 5543902
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:20; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ACCELERATORS
BARYONS
BASIC INTERACTIONS
CAPTURE
CATIONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
DATA
DIFFERENTIAL EQUATIONS
DIRAC EQUATION
ELECTROMAGNETIC INTERACTIONS
ELECTRON CAPTURE
ELECTRON PAIRS
ELECTRON-POSITRON INTERACTIONS
ELECTRONIC STRUCTURE
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
FERMIONS
GEV RANGE
GEV RANGE 01-10
HADRONS
HEAVY ION ACCELERATORS
HEAVY ION REACTIONS
INFORMATION
INTERACTIONS
IONS
K SHELL
LEAD IONS
LEPTON-LEPTON INTERACTIONS
NUCLEAR REACTIONS
NUCLEONS
NUMERICAL DATA
PAIR PRODUCTION
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PROJECTILES
RELATIVISTIC RANGE
THEORETICAL DATA
TIME DEPENDENCE
URANIUM IONS
WAVE EQUATIONS