The pion velocity at chiral restoration and the vector manifestation
نویسندگان
چکیده
منابع مشابه
The Pion Velocity at Chiral Restoration and the Vector Manifestation
We study the effects of Lorentz non-invariance on the physical pion velocity at the critical temperature Tc in an effective theory of hidden local symmetry (HLS) with the “vector manifestation” fixed point. We match at a “matching scale” ΛM the axial-vector current correlator in the HLS with the one in the operator product expansion for QCD, and present the matching condition to determine the b...
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We study the pion velocity near the critical temperature Tc of chiral symmetry restoration in QCD. Using chiral perturbation theory based on hidden local symmetry (HLS) as an effective field theory, where the chiral symmetry restoration is realized as the vector manifestation (VM), we show that the pion velocity for T → Tc is close to the speed of light, vπ(T ) = 0.83 − 0.99 which is at varianc...
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The question as to what the relevant effective degrees of freedom at the chiral phase transition are remains largely unanswered and must be addressed in confronting both terrestrial and space laboratory observations purporting to probe matter under extreme conditions. We address this question in terms of the vector susceptibility χV (VSUS in short) and the axial-vector susceptibility χA (ASUS i...
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Recent research activities on the chiral structure of hadronic matter near the phase transition predicted by QCD and extensively looked for in terrestrial laboratories as well as in satellite observatories raise the issue of whether we have fully identified the relevant degrees of freedom involved in the transition. In this talk, I would like to discuss a recent novel approach to the issue base...
متن کاملThe Vector Manifestation and Effective Degrees of Freedom At Chiral Restoration
The role of effective degrees of freedom on the vector and axial-vector susceptibilities and the pion velocity at chiral restoration is analyzed. We consider two possible scenarios, one in which pions are considered to be the only low-lying degrees of freedom – that we shall refer to as “standard” – and the other in which pions, vector mesons and constituent quarks (or quasiquarks in short) are...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2004
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2003.10.021