Results 41 to 50 of about 99,149 (216)
The two-loop perturbative correction to the (g − 2) μ HLbL at short distances
Journal of High Energy Physics, 2021 The short-distance behaviour of the hadronic light-by-light (HLbL) contribution to (g − 2) μ has recently been studied by means of an operator product expansion in a background electromagnetic field.
Johan Bijnens +3 more
doaj +1 more source
Renormalon Cancellation and Perturbative QCD Potential as a Coulomb+Linear Potential
, 2003 Recently evidence has been found that the perturbative QCD potential agrees well with phenomenological potentials and lattice computations of the QCD potential.
Sumino, Y.
core +3 more sources
Perturbative QCD and tau decay [PDF]
Nuclear Physics B - Proceedings Supplements, 1997 Sufficiently inclusive observables in the decay of the tau lepton can be calculated using the methods of perturbative QCD. These include the asymmetry parameter $A_ $ that determines that angular distribution of the total hadron momentum in the decay of a polarized tau.
openaire +2 more sources
Space- and time-like electromagnetic pion form factors in light-cone pQCD
, 2010 We present a combined analysis of the space- and time-like electromagnetic pion form factors in light-cone perturbative QCD with transverse momentum dependence and Sudakov suppression. Including the non-perturbative ``soft' QCD and power suppressed twist-
Ackermann +56 more
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Connecting the hadron mass scale to the fundamental mass scale of quantum chromodynamics
Physics Letters B, 2015 Establishing an explicit connection between the long distance physics of confinement and the dynamical interactions of quarks and gluons at short distances has been a long-sought goal of quantum chromodynamics.
A. Deur, S.J. Brodsky, G.F. de Teramond
doaj +1 more source
Static quark anti-quark free energy and the running coupling at finite temperature
, 2004 We analyze the free energy of a static quark anti-quark pair in quenched QCD at short and large distances. From this we deduce running couplings, g^2(r,T), and determine the length scale that separates at high temperature the short distance perturbative ...
B. Beinlich +5 more
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Partonic Picture of Nuclear Shadowing at Small x [PDF]
, 1997 We investigate the nuclear shadowing mechanism in the context of perturbative QCD and the Glauber multiple scattering model. Using recent HERA data on nucleon structure function at small $x$, we put stringent constrains on the nucleon gluon density in ...
Huang, Zheng +2 more
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Topics in non-perturbative QCD [PDF]
Czechoslovak Journal of Physics, 2001 23 pages,6figures.Lectures delivered at the Czech Summer School,Prague Aug28-Sept1st 2000,to appear in Czech Journal of Physics Feb ...
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Non-perturbative to perturbative QCD via the FFBRST
European Physical Journal C: Particles and Fields, 2018 Recently a new type of quadratic gauge was introduced in QCD in which the degrees of freedom are suggestive of a phase of abelian dominance. In its simplest form it is also free of Gribov ambiguity.
Haresh Raval, Bhabani Prasad Mandal
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Physics Letters B, 2023 While perturbative QCD is sufficient for understanding the color, mass and energy dependences of parton energy loss and jet quenching at large transverse momentum in heavy-ion collisions, a simultaneous description of heavy flavor nuclear modification ...
Wen-Jing Xing +2 more
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