|
Quark-gluon plasma is a superheated, high-density mass of quarks and gluons which is believed to have existed during the first 20 or 30 microseconds of the Universe's existence. In such a mass the conditions for asymptotic freedom would hold, and as a result, confinement would become irrelevant. This is believed to be the only way that free quarks could exist. It is named by analogy with traditional plasma in which normal bonds between electrons and nuclei are broken. For other uses of this term, see: Quark (disambiguation) 1974 discovery photograph of a possible charmed baryon, now identified as the Σc++ In particle physics, the quarks are subatomic particles thought to be elemental and indivisible. ...
In physics, gluons are the bosonic particles which are responsible for the strong nuclear force. ...
In physics, asymptotic freedom is the property of some gauge theories in which the interaction between the particles, such as quarks, becomes arbitrarily weak at ever shorter distances, i. ...
This article refers to a particle physics phenomenon. ...
This article is about plasma in the sense of an ionized gas. ...
It is also called the deconfining phase of QCD. The acronym QCD can mean: Quantum chromodynamics Quintessential Player This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
Its existence has been tentatively confirmed by results obtained at Brookhaven National Laboratory's Relativistic Heavy Ion Collider (RHIC). The current (April 2005) consensus of the four RHIC research groups is that they have created a quark-gluon liquid of very low viscosity. However, contrary to the widespread assumption, it is yet unknown from theoretical predictions whether the QCD "plasma", especially close to the transition temperature should behave like a gas or fluid. Authors favoring the weakly interacting interpretation derive their assumptions from the lattice QCD calculation, where the entropy density of quark-gluon plasma approaches the weakly interacting limit. However, since both energy density and correlation shows significant deviation from the weakly interacting limit, it has been pointed by many authors that there is in fact no reason to assume a QCD "plasma" close to the transition point should be weakly interacting, as like electromagnetic plasma (e.g. [1] (http://arxiv.org/abs/nucl-th/0403032)). Aerial view of Brookhaven National Laboratory. ...
The Relativistic Heavy Ion Collider (RHIC) is a heavy-ion collider located at and operated by the Brookhaven National Laboratory in Upton, New York. ...
A liquid will assume the shape of its container. ...
Viscosity is a measure of the resistance of a fluid to deformation under shear stress. ...
It has also been hypothesized that the tentatively observed QCD fireball at RHIC may itself be the analog of a micro black hole. The results will be published across a number of papers in the journal Nuclear Physics A. A micro black hole in physics is a black hole of small mass around which quantum mechanical effects play an important role. ...
External links |
Feeds |
Contact