Results 81 to 90 of about 99,149 (216)
Higher-order QCD corrections to hadronic τ decays from Padé approximants
Journal of High Energy Physics, 2018 Perturbative QCD corrections to hadronic τ decays and e + e − annihilation into hadrons below charm are obtained from the Adler function, which at present is known in the chiral limit to five-loop accuracy.
Diogo Boito, Pere Masjuan, Fabio Oliani
doaj +1 more source
On the behaviour of single scale hard small $x$ processes in QCD near the black disc limit
, 2006 We argue that at sufficiently small Bjorken $x$ where pQCD amplitude rapidly increases with energy and violates probability conservation the shadowing effects in the single-scale small $x$ hard QCD processes can be described by an effective quantum field
B. Blok +19 more
core +1 more source
Four-jet angular distributions and color charge measurements: leading order versus next-to-leading order [PDF]
, 1997 We present the next-to-leading order perturbative QCD prediction to the four-jet angular distributions used by experimental collaborations at LEP for measuring the QCD color charge factors.
A. Signer +25 more
core +2 more sources
Two Micron‐Size Dark Dimensions
Fortschritte der Physik, Volume 73, Issue 8, August 2025.Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui +2 more
wiley +1 more source
, 1998 We analyse the data for the proton structure function $F_2$ over the entire $Q^2$ domain, including especially low $Q^2$, in terms of perturbative and non-perturbative QCD contributions.
Martin, A. D., Ryskin, M. G., Stasto, A.
core +2 more sources
Spectral density constraints in quantum field theory [PDF]
, 2015 Determining the structure of spectral densities is important for understanding the behaviour of any quantum field theory (QFT). However, the exact calculation of these quantities often requires a full non-perturbative description of the theory, which for
Lowdon, Peter
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We give an introduction to perturbative Quantum Chromodynamics, focusing on a pedagogical description of concepts and methods to calculate cross sections measured at high energy colliders. After introducing basic concepts that allow for a perturbative expansion, such as factorisation and asymptotic freedom, we introduce loop integrals and the treatment
Heinrich, Gudrun, Olsson, Anton
openaire +2 more sources
AN ANALYTIC APPROACH TO PERTURBATIVE QCD [PDF]
International Journal of Modern Physics A, 2000 The two-loop invariant (running) coupling of QCD is written in terms of the Lambert W function. The analyticity structure of the coupling in the complex Q2-plane is established. The corresponding analytic coupling is reconstructed via a dispersion relation.
openaire +3 more sources
Fortschritte der Physik, Volume 73, Issue 8, August 2025.Abstract In this study, the properties, equilibrium, and stability of compact objects within the framework of teleparallel gravity with the generalized MIT bag model are investigated. By incorporating the modified field equations, the influence of the generalized bag constant on the structure and physical characteristics of quark stars and neutron ...
Sayantan Ghosh +2 more
wiley +1 more source
Perspectives on Exclusive Processes in QCD [PDF]
, 2002 Hard hadronic exclusive processes are now at the forefront of QCD studies, particularly because of their role in the interpretation of exclusive hadronic B decays.
Brodsky, Stanley J.
core +5 more sources