The Hambury-Brown Twiss intensity interferometry measurements by the ALICE collaboration indicate Lifetimes of plasma of a few fm/c, i.e. several times 10^-23 seconds. There may be first order transition from gluon plasma to Glueball fluid as predicted in Lattice pure gauge theory at T_c=270MeV, however our knowledge of the initial state of t,he relativistic heavy ion collision is not sufficient to pin the answer to this question down unambigously... 

Dear Mohamed,

based on we know T0 can we compute an estimation of time evolution of QGP? E.g. using Friedmann equations? (in case we are not heating it after creation, oit is only normal cooling)

QGP created in relativistic heavy ion collisions at LHC or RhIC is assumed to explode due ti its high pressure in less than 10^-22seconds.

Cold quark matter was speculated to be absolutely stable, as strange matter even negatively charged. 

Dear Horst,

thank you very much for your sophisticated and precise answer.

Best regards,

Attila

The Hambury-Brown Twiss intensity interferometry measurements by the ALICE collaboration indicate Lifetimes of plasma of a few fm/c, i.e. several times 10^-23 seconds. There may be first order transition from gluon plasma to Glueball fluid as predicted in Lattice pure gauge theory at T_c=270MeV, however our knowledge of the initial state of t,he relativistic heavy ion collision is not sufficient to pin the answer to this question down unambigously... 

It looks like you are quite young and enthusiast and that your scientific concerns are much apart from your present professional job, which has enough merit.

 Before considering this question, very specialized, about the properties of a supposed plasma of quarks and gluons, we think it is previously convenient to address some of the serious conceptual deficiencies of the standard model, which is highly fanciful in its approach. Its conceptual strategy is based on a set of combinations of abysmally artificial primordial elements, such as quarks and gluons. Their properties are much bizarre: fractional charges, flavors, colors, convenient and arbitrary quarks masses, and all this strategy only applies to hadrons, leaving aside all other particles that remain structureless or with undefined structure. For much willingness one may put, the standard model approach is so fanciful that there is no way to take seriously this model.

Let's break down the main conceptual artefacts of this model. It considers that hadrons are formed by six families of quarks (u, d, c, s, t, b) joined together by a complex gluonic field composed of height types of gluons. In addition, this model is not unitary because it includes other elementary particles not made of quarks, such as e.g. the six leptons (e, νe, μ, νμ, τ, ντ), the photon and the three intermediate bosons (Z, W+ and W-). Thus, the standard model is based on a multiplicity of primary particles: 6 quarks and 6 antiquarks tri-chromatic, 8 gluons also tri-chromatic, 6 leptons and 6 antileptons, the photon and 3 intermediate bosons, which leaves much to be desired as a unitary claim.

 It is a deep intellectual error to think that, at the very starting point of matter, its elementary building blocks would have such a complex structure as the standard model gives them. The complexity of the structure of elementary particles from the standard model is highly incredible and artificial. Furthermore, the quark model has no reductive power. It appeals to 60 primary elements or key states: 36 different quarks (6 families of tri-chromatic quarks and antiquarks), and 24 different gluons (8 tri-chromatic types). Thus, it has no horizon of being unitary, moreover conceptually quite puzzling and showing a severe lack of realism. Frank Wilczek, Nobel laureate, 2004, said: "from the perspective of QCD, the foundations of nuclear physics appear distinctly unsound".

So, before taking such a question we believe it would be convenient to address more fundamental ones. You should have enough cleverness in being critical about the standard model profit-seeking propaganda.

Dear Attila,

Now, i am working on QGP. as far i know that the life time of QGP is depend to the energy of colliding nucleus and maybe the kind of nucleus and so on. generally, it is expected the life time would be between 3-8 fm/c. but all of data are under investigation.

The replies from Horst Stocker are the best. They certainly are not "propaganda".

We have so far learned about it is:

(i) that the life time of OGP  is a few fermi/c, i.e. several times 10^-23 second.

 (ii) that QGP exists in the nature, i.e. in the core of super densed stars/stellar objects like neutron star. The core of such stellar objects is considered to be made up of quarks and/or diquarks.