On the role of the quark mass thresholds in extrapolations of the running αs
Jiri Chyla
Abstract
The accuracy of the conventional treatment of quark mass thresholds in the QCD running coupling constant αs, based on the step approximation to the β--function, is investigated. The errors of extrapolating (μ) from low energies to μ=MZ, implied by this approximation, are shown to be of the same magnitude as the typical next--to--next--to--leading order contributions to and tend to increase the resulting . The importance of the proper choice of matching points is emphasized.
Create a lesson
Related papers
Electromagnetic form factors of vector mesons in Einstein-dilaton holographic QCD
Alfonso Ballon-Bayona, Tobias Frederico, Luis A. H. Mamani et al.
An invertible map between 3D Breit-frame mechanical distributions and 2D infinite-momentum-frame mechanical densities in spin-1 hadrons
Kemal Tezgin
Adiabatic hydrodynamization with transverse spatial gradients in boost-invariant plasmas
Uri Sharell, Jasmine Brewer, Weiyao Ke
Line shapes of Ω(2012) production in the Ξ K and Ξπ K decay channels
Natsumi Ikeno, Eulogio Oset
A quantum representation of π fragmentation functions through variational quantum circuits
David F. Rentería-Estrada, Roger J. Hernández-Pinto, Germán Rodrigo et al.
Particle Physics Driven by Quantum Technology - Quantum Simulations and Quantum Sensing
Itay M. Bloch, Marcela Carena, Yifan Chen et al.