Momentum broadening in unstable quark-gluon plasma
- Brandon University, Brandon, Manitoba (Canada). Department of Physics; Winnipeg Institute for Theoretical Physics, Winnipeg, Manitoba (Canada)
- Jan Kochanowski University, Kielce (Poland). Institute of Physics; National Centre for Nuclear Research, Warsaw (Poland)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department
We present that quark-gluon plasma produced at the early stage of ultrarelativistic heavy-ion collisions is unstable, if weakly coupled, due to the anisotropy of its momentum distribution. Chromomagnetic fields are spontaneously generated and can reach magnitudes much exceeding typical values of the fields in equilibrated plasma. We consider a high-energy test parton traversing an unstable plasma that is populated with strong fields. We study the momentum broadening parameter $$ˆ\atop{q}$$ which determines the radiative energy loss of the test parton. We develop a formalism which gives $$ˆ\atop{q}$$ as the solution of an initial value problem, and we focus on extremely oblate plasmas which are physically relevant for relativistic heavy-ion collisions. The parameter $$ˆ\atop{q}$$ is found to be strongly dependent on time. For short times it is of the order of the equilibrium value, but at later times $$ˆ\atop{q}$$ grows exponentially due to the interaction of the test parton with unstable modes and becomes much bigger than the value in equilibrium. The momentum broadening is also strongly directionally dependent and is largest when the test parton velocity is transverse to the beam axis. Lastly, consequences of our findings for the phenomenology of jet quenching in relativistic heavy-ion collisions are briefly discussed.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1376096
- Alternate ID(s):
- OSTI ID: 1343641
- Report Number(s):
- BNL-113922-2017-JA
- Journal Information:
- Physical Review. C, Vol. 95, Issue 2; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
First principles-based applications of the Vlasov equation to dissipative systems
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journal | May 2019 |
| Energy loss of heavy quarks in the isotropic collisional hot QCD medium | preprint | January 2019 |
Energy loss of heavy quarks in the isotropic collisional hot QCD medium
|
journal | September 2019 |
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