Nonperturbative enhancement of heavy quark-pair production in a strong SU(2) color field

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.074014· OSTI ID:21421374

Levai, Peter; Skokov, Vladimir ^[1]

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1. KFKI RMKI Research Institute for Particle and Nuclear Physics, P.O. Box 49, Budapest 1525 (Hungary)

Nonperturbative charm and bottom quark-pair production is investigated in the early stage of heavy-ion collisions. The time-dependent study is based on a kinetic description of fermion-pair production in strong non-Abelian fields. We introduce a time-dependent chromo-electric external field with a pulselike time evolution to simulate the overlap of two colliding heavy ions. The calculations is performed in a SU(2) color model with finite current quark masses. Yields of heavy quark pairs are compared to the ones of light and strange quark pairs. We show that the small inverse duration time of the field pulse determines the efficiency of the quark-pair production. The expected suppression for heavy quark production, as follows from the Schwinger formula for a constant field, is not seen, but rather an enhanced heavy quark production appears at ultrarelativistic energies.

• OSTI ID: 21421374
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 7; Other Information: DOI: 10.1103/PhysRevD.82.074014; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
B QUARKS
C QUARKS
COLOR MODEL
EFFICIENCY
HEAVY ION REACTIONS
HEAVY IONS
MASS
PAIR PRODUCTION
PERTURBATION THEORY
QUARK-QUARK INTERACTIONS
RELATIVISTIC RANGE
S QUARKS
SU-2 GROUPS
T QUARKS
TIME DEPENDENCE
BEAUTY PARTICLES
CHARGED PARTICLES
CHARM PARTICLES
COMPOSITE MODELS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
INTERACTIONS
IONS
LIE GROUPS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUARK MODEL
QUARKS
STRANGE PARTICLES
SU GROUPS
SYMMETRY GROUPS
TOP PARTICLES