QCD correlation functions and instantons
نویسندگان
چکیده
منابع مشابه
Instantons and Meson Correlation Functions in QCD
Various QCD correlators are calculated in the instanton liquid model in zeromode approximation and 1/Nc expansion. Previous works are extended by including dynamical quark loops. In contrast to the original ”perturbative” 1/Nc expansion not all quark loops are suppressed. In the flavor singlet meson correlators a chain of quark bubbles survives the Nc →∞ limit causing a massive η′ in the pseudo...
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A recently proposed generating functional allows the construction of the full set of n-point Green functions in QCD at high temperature and at distances larger than 1/gT. One may then learn how the system maintains its thermal equilibrium in the quantum field theory approach, i.e. which process compensates for the important dissipation due to collisions. This system may be characterized by quan...
متن کاملQcd Instantons and 2d Surfaces
Some time ago, Atiyah showed that there exists a natural identification between the k-instantons of a Yang-Mills theory with gauge group G and the holomorphic maps from CP1 to ΩG. Since then, Nair and Mazur, have associated the Θ vacua structure in QCD with self-intersecting Riemann surfaces immersed in four dimensions. From here they concluded that these 2D surfaces correspond to the non-pertu...
متن کاملHeavy hadrons and QCD instantons.
Heavy hadrons are analyzed in a random and dilute gas of instantons. We derive the instanton-induced interactions between heavy and light quarks at next to leading order in the heavy quark mass and in the planar approximation, and discuss their effects on the hadronic spectrum. The role of these interactions in the formation of exotic hadrons is also discussed. PACS numbers: 11.15.Pg, 12.38.Cy,...
متن کاملInstantons in QCD
We review the theory and phenomenology of instantons in QCD. After a general overview, we provide a pedagogical introduction to semi-classical methods in quantum mechanics and field theory. The main part of the review summarizes our understanding of the instanton liquid in QCD and the role of instantons in generating the spectrum of light hadrons. We also discuss properties of instantons at fin...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1994
ISSN: 0920-5632
DOI: 10.1016/0920-5632(94)90324-7