QCD plasma instabilities and isotropization

  • We solve the coupled Wong Yang–Mills equations for both U(1) and SU(2) gauge groups and anisotropic particle momentum distributions numerically on a lattice. For weak fields with initial energy density much smaller than that of the particles we confirm the existence of plasma instabilities and of exponential growth of the fields which has been discussed previously. Also, the SU(2) case is qualitatively similar to U(1), and we do find significant “abelianization” of the non-Abelian fields during the period of exponential growth. However, the effect nearly disappears when the fields are strong. This is because of the very rapid isotropization of the particle momenta by deflection in a strong field on time scales comparable to that for the development of Yang–Mills instabilities. This mechanism for isotropization may lead to smaller entropy increase than collisions and multiplication of hard gluons, which is interesting for the phenomenology of high-energy heavy-ion collisions.

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Author:Adrian Bogdan DumitruORCiDGND, Yasushi NaraORCiD
Parent Title (English):Physics Letters B
Place of publication:Amsterdam u.a.
Document Type:Article
Date of Publication (online):2005/06/24
Date of first Publication:2005/06/24
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2023/10/06
Page Number:7
First Page:89
Last Page:95
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
PACS-Classification:10.00.00 THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS (for experimental methods and instrumentation for elementary-particle physics, see section 29) / 12.00.00 Specific theories and interaction models; particle systematics / 12.38.-t Quantum chromodynamics; Quarks, gluons, and QCD in nuclear reactions, see 24.85.+p / 12.38.Mh Quark-gluon plasma (see also 25.75.Nq Quark deconfinement, quark-gluon plasma production and phase transitions in relativistic heavy ion collisions; see also 21.65.Qr Quark matter)
20.00.00 NUCLEAR PHYSICS / 24.00.00 Nuclear reactions: general / 24.85.+p Quarks, gluons, and QCD in nuclear reactions
20.00.00 NUCLEAR PHYSICS / 25.00.00 Nuclear reactions: specific reactions / 25.75.-q Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions)
50.00.00 PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES / 52.00.00 Physics of plasmas and electric discharges (for space plasma physics, see 94.05.-a; for astrophysical plasmas, see 95.30.Qd; for physics of the ionosphere and magnetosphere, see 94.20.-y and 94.30.-d respectively) / 52.35.-g Waves, oscillations, and instabilities in plasmas and intense beams (see also 94.20.wf Plasma waves and instabilities in physics of the ionosphere; 94.30.cq MHD waves, plasma waves, and instabilities in physics of the magnetosphere; 96.50.Tf MHD waves, pl / 52.35.Qz Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.)
Licence (German):License LogoCreative Commons - Namensnennung 3.0