Results 91 to 100 of about 115,526 (231)
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
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
QCD perturbation theory at low energies
Physical Review Letters, 1992 We apply the optimization procedure based on the Principle of Minimal Sensitivity to the third-order calculation of $\R$. The effective couplant remains finite, freezing to a value $α_s/π= 0.26$ at low energies. Using Poggio-Quinn-Weinberg smearing we find good agreement between theory and experiment right down to zero energy.
Mattingly, A. C., Stevenson, P. M.
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
A convergent reformulation of perturbative QCD [PDF]
, 2000 We present and explore a new formulation of perturbative QCD based not on the renormalised coupling but on the dimensional transmutation parameter of the theory and the property of asymptotic scaling.
Alves(^1), Ricardo João Gaio
core
Non-Perturbative High-Energy QCD [PDF]
, 2001 It is the aim of this talk to review our understanding of the high-energy limit of QCD, focussing, in particular, on recent theoretical developments. After a brief introduction, I will recall why the true high-energy limit of QCD scattering processes is ...
Hebecker, A, Arthur Hebecker
core +1 more source
Axion‐Like Interactions and CFT in Topological Matter, Anomaly Sum Rules and the Faraday Effect
Advanced Physics Research, Volume 4, Issue 7, July 2025.This review investigates the connection between chiral anomalies and their manifestation in topological materials, using both perturbative methods based on ordinary quantum field theory and conformal field theory (CFT). It emphasizes the role of CFT in momentum space for parity‐odd correlation functions, and their reconstruction by the inclusion of a ...
Claudio Corianò +4 more
wiley +1 more source
Perturbative QCD evolution and color dipole picture [PDF]
, 2011 Schildknecht D. Perturbative QCD evolution and color dipole picture.
Schildknecht, Dieter
core
European Physical Journal C: Particles and FieldsWe revisit $$B\rightarrow K^*\pi $$ B → K ∗ π and $$B\rightarrow K\rho $$ B → K ρ decay processes using the modified perturbative QCD approach, which is developed based on the perturbative QCD approach with a few improvements.
Ru-Xuan Wang, Mao-Zhi Yang
doaj +1 more source
A new determination of higher-order QCD corrections to hadronic τ decays
Physics Letters BWe employ Levin-type sequence transformations to accelerate the convergence of the perturbative fixed-order expansion of the QCD correction δ(0) in terms of the strong coupling αs.
Gauhar Abbas, Vartika Singh
doaj +1 more source