منابع مشابه
The Degrees of Freedom in Hot Quenched QCD
In quenched QCD, on lattices with Nτ = 4, the absence of a pole in the pseudoscalar meson channel for T > Tc is demonstrated. A set of effective 4-fermi couplings is extracted. It is observed that this coupling is small in the vector channel for all T > Tc, but not in the pseudoscalar channel. The temperature dependence of hadronic parameters below Tc is found to be small. (Talk presented at th...
متن کاملMatter degrees of freedom and string breaking in Abelian projected quenched SU ( 2 ) QCD
In the Abelian projection the Yang–Mills theory contains Abelian gauge fields (diagonal degrees of freedom) and the Abelian matter fields (off-diagonal degrees) described by a complicated action. The matter fields are essential for the breaking of the adjoint string. We obtain numerically the effective action of the Abelian gauge and the Abelian matter fields in quenched SU(2) QCD and show that...
متن کاملConformal invariance and degrees of freedom in the QCD string.
We demonstrate that the Hagedorn-like growth of the number of observed meson states can be used to constrain the degrees of freedom of the underlying effective QCD string. We find that the temperature relevant for such string theories is not given by the usual Hagedorn value TH ≈ 160 MeV, but is considerably higher. This resolves an apparent conflict with the results from a static quark-potenti...
متن کاملHadronic Degrees of Freedom
The point of view I take to summarize some of the research activities in Italy in the field of hadronic physics, is determined by the (today accepted) fundamental degrees of freedom of the strong interactions, namely quarks and gluons. The Sec. 2 is devoted to the link of the fundamental theory of strong interactions, Quantum Chromodynamics (QCD), with effective degrees of freedom often used to...
متن کاملFew degrees of freedom
The climate change conference in Copenhagen last month went to the wire with no agreement emerging until late on the last day. Ahead of the meeting, President Obama was expected to make a significant financial commitment to a global climate protection fund rather than improve on his provisional offer of cutting emissions by 4 per cent on 990 levels by 2020. The final accord declared deep cuts i...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1993
ISSN: 0920-5632
DOI: 10.1016/0920-5632(93)90225-u