Walter Wagner | Increasing the energy of the collision does not increase the 'temperature'. Temperature is a measure for electromagentic interactions.

Dear Mr Wagner

Do you know some publications about that ?
I think LSAG told that the temperature will increase at higher energies than at the RHIC and that strange quarks will not be bound together to strange matter at higher energies because of the higher temperature ? So how can anybody know who is right ?
(I am a "strangelets-bloody beginner"...)
Thank you for your help.

Sincerely yours,

N. Tottoli

Mr. Wagner,
in chemistry you can have two substances A and B in a thermal equilibrium. You increase the temperature (energy per degree of freedom) in the two-component system and you start to produce a substance C from the reaction A+B->C.
The system can be still well described by thermodynamics introducing a chemical potential in addition to temperature. This method is by construction independent of the kind of components interactions.
Can you tell us why thermodynamics is not valid in a hadronic gas or QCD matter ?

MacMag

@ Mac Mag: Dr. Wagner by e-mail 02.08.2010 at 14:49 CET

I believe he's comparing apples with oranges. His thermodynamic equation (A, B, C) would be correct if there weren't the fourth factor. But there is. While temperature is a measure of freedom, it is strictly non-relativistic. At the energies that we'd be dealing with, the temperature becomes essentially a meaningless number. Indeed, the excess energy is converted not into higher temperature, but instead produces (or allows virtual strange-quarks to become real) strange-quarks via energy-into-mass conversion. We don't know how many strange quarks have to come into existence in close proximity to each other and a few up/down quarks, but as I recall, it is on the order of 8-10 at the lower end in order to form a strangelet (of say 8 ups, 8 downs, and 8 stranges). At that size, it would be highly radioactive, but with a finite half-life. Some few might live long enough to interact with the nearby Helium (or Hydrogen in insulations, etc.), acquire mass, and grow larger and hence with a long half-life (more stable) until full stability is reached (at around A = 100 ?)

"... temperature is strictly non-relativistic"

You must be joking Mr. Wagner. One of the most famous laws of nature using thermodynamics, Planck's Law, applies to
fully relativistic (beta = 1) particles (photons in this case).
Mac Mag

@ Mac Mag: Dr. Wagner by e-mail 02.08.2010 at 17:06 CET

Marc:
Surely he must be joking. I believe it is well expected by theorists that high-energy collisions that 'de-confine' quarks as expected at the LHC will also have that energy producing additional new quarks. Rather than challenging me, I would challenge him to show that increasing the energy does not increase the number of quarks than can be produced, and instead raises the temperature.

Walter
------

"of say 8 ups, 8 downs, and 8 stranges"

Hello Dr.Wagner,

how do you get a neutral charged strangelet ? Do you agree that this contradicts to the "Review of Speculative “Disaster Scenarios” at RHIC" by Jaffe, Busza, Sandweiss and Wilczek, page 13f, section b "Charge and flavor composition" ?


Best regards, Ralf Kannenberg

Walter, I never claimed that number density stays constant. But you claim that temperature is a measure for electromagnetic interactions and stays constant for relativistic QCD media.
This is factually wrong.
Since it is certainly not from a textbook and against all that we have learned so far from experiments,
could you reveal us more details about your new "theory of temperature".

Thanks Mac Mag

As was more recently implied above by Walter, the relativistic colliding particle masses enable the greater overall particle masses to emerge with increased collision energy. This seems to be forgotten in lsag report which, in particular, mistakenly claims that the rate of production of omega (triple strange) particles goes down with collision energy. The graph they rely on for this is based on an irrelevant comparison.

The actual yield data shows the opposite (andronic , stachel, braun-munzinger fig.s 22-23 - one of lsag references).

Then lsag claims that increased energy decreases the chance of nuclei type particles (they group them with strangelets) emerging:

1)strangelets aren't nuclei as they are all in one gluon bound system (even with >=6 r.a.m.)
2)supposing the comparison to still be relevant.. they claim that multi nucleons are less likely to emerge with collision energy. But this is only based on data about decreasing yields of helium II or III with increased collision energy. But on the other hand - the proportion of up and down quarks increases with collision energy as more strange quarks emerge. So this is completely neglected in lsag's basis for estimating likelihood of strangelets emerging from lhc.

I agree though that e-m (whose induced collisions I understand are responsible for heat) surpasses the strong force in high energy collision but only with respect to the strong force (weaker) adhesive aspect, otherwise the quark separation within emitted hadrons wouldn't occur.

Eric