Perturbative QCD
Are two gluons the QCD Pomeron?
... of QCD, we can at best speculate on how to calculate elastic ...to perturbative computation, ...of perturbative QCD: the hard ...in QCD, suggested by the phenomenology of heavy quark ...
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Non-linear QCD dynamics in two-photon interactions at high energies
... Abstract Perturbative QCD predicts that the growth of the gluon density at high energies should saturate, forming a Color Glass Condensate (CGC), which is described in mean field approximation by the ...
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The temperature dependence of the QCD running coupling
... clusion is based on general considerations, where no specific calculations of the vertices and self-energies were done. Later, more rigorous treatments based on the RGE were developed [2, 3], with applications to ...
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Braz. J. Phys. vol.34 número4A
... The perturbative QCD has furnished a remarkably succes- sful framework to interpret a wide range of high energy lepton-lepton, lepton-hadron and hadron-hadron ...
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Critical coupling for chiral symmetry breaking in QCD motivated models
... for perturbative QCD, and recovered in a particular limit the result obtained with the model involving a delta function for the infrared gluon ...different QCD motivated models, and in the cases we ...
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A estrutura do nucleon na QCD e o modelo estatístico a Quarks
... consider perturbative QCD processes of gluon emissions by the quarks, which split into quark-antiquark pairs (to which generates equal components of the ...
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Braz. J. Phys. vol.37 número1A
... where this effective action is gauge invariant. If we calcu- late the pressure up to order g 2 , considering the expansion on chemical potential up to order µ 4 , we surprisingly obtain the same result as in the usual ...
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Braz. J. Phys. vol.37 número1B
... with QCD inspired models, like the LN Pomeron model, or just perturbative QCD calculations improved by the use of an effective gluon propagator or cou- pling constant, we see that Cornwall’s ...
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Effects of dynamical masses of gluons and quarks on hadronic B decays
... Perturbative QCD has been largely applied in the study of B meson decays, specially in non-leptonic decays which requires the calculation of hadronic matrix ...The perturbative dynamics can be ...
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Braz. J. Phys. vol.37 número2C
... of perturbative parton showering and non-perturbative hadronization in shaping the main jet ...the perturbative QCD (pQCD) stage of jet formation must be dominant, and the role of the ...
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Analyzing dynamical gluon mass generation
... In conclusion, we have presented an analysis of the various intertwined issues involved in the study of dynamical gluon mass generation through SD equations. The analysis was car- ried out in the context of the PT-BFM ...
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Braz. J. Phys. vol.38 número3B
... Diffractive physics covers the class of inelastic interactions that contain large rapidity gaps (LRGs, ∆η & 4) devoid of hadronic activity and where one or both protons emerge intact in the final state [18]. Such ...
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Study of the (D)over-barN Interaction in a QCD Coulomb Gauge Quark Model
... the QCD Hamiltonian in Coulomb gauge ...in QCD, and are thought to be responsible for the properties of the structure and interactions of hadrons at low ...
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Topological charge screening and pseudoscalar glueballs
... [2] For a review of instantons in QCD see T. Schaefer and E.V. Shuryak, Rev. Mod. Phys. 70, 323 (1998). For an elemen- tary introduction see H. Forkel, A Primer on Instantons in QCD, hep-ph/0009136. For ...
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Covariance for electromagnetic current for two bosons at higher order in the light front
... of perturbative coupling, the calculation of the electromagnetic current in the light front coordinates for scalar bosons in the electromagnetic background ...
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Estudo de sistemas hadrônicos no limite de acoplamento forte da QCD: simetria quiral a densidades e temperaturas finitas
... (3.153), o qual, por sua vez, é empregado na definição do ope- rador unitário da transformação de Fock-Tani. A transformação é usada para obter uma Hamiltoniana em termos de operadores[r] ...
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Braz. J. Phys. vol.37 número1B
... This special issue of the Brazilian Journal of Physics collects the short courses and the seminars presented at the international meeting “Infrared QCD in Rio: propagators, condensates and topological effects”. ...
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Strong D* -> D pi and B* -> B pi couplings
... lattice QCD, our approach has merits: for example, direct access to the chiral limit, a veracious expression of DCSB, reliable treatment of light quarks, and a dynamical treatment of all ...
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Braz. J. Phys. vol.36 número4B
... of QCD could lead to quark pairs of equal momenta and opposite di- rections near the Fermi surface, in analogy with the electron pairs of the BCS theory [3] of superconductivity in solid state ...The QCD ...
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