Results 21 to 30 of about 2,356,950 (226)
$\alpha_{QED, eff}$(s) for precision physics at the FCC-ee/ILC
, 2019 Discovering “Physics behind precision” at future linear or circular colliders (ILC/FCC projects) requires improved SM predictions based on more precise input parameters. I will review the role αQED, eff at future collider energies and report on possible progress based on results from low energy machines.
Jegerlehner, F, Jegerlehner, Fred
openaire +3 more sources
Journal of Cosmology and Astroparticle Physics, 2021 We present in this work a new calculation of the standard-model benchmark value for the effective number of neutrinos, Neff SM, that quantifies the cosmological neutrino-to-photon energy densities.
Jack J. Bennett +6 more
semanticscholar +1 more source
The longitudinal structure function in the presence of QED effects
Physics Letters B, 2021 The highest precision for theoretical predictions at the high LHC energy requires the calculation of parton distribution function (PDFs) and the structure functions which include heavy quarks that include perturbative QCD and QED corrections.
Marzieh Mottaghizadeh +1 more
doaj +1 more source
Precision Engineering behind European Astronomy Programmes [PDF]
, 2011 The fields of astronomy science have presented significant precision engineering challenges. Numerous solutions for these fields of science have achieved unprecedented levels of accuracy, sensitivity and sheer scale.
Shore, Paul, Tonnellier, Xavier
core +7 more sources
Stringent test of QED with hydrogen-like tin [PDF]
Nature, 2023 A high-precision, high-field test of quantum electrodynamics measuring the bound-electron g factor in hydrogen-like tin is described, which—together with state-of-the-art theory calculations—yields a stringent test in the strong-field regime. Inner-shell
J. Morgner +18 more
semanticscholar +1 more source
Resolving charged hadrons in QED — gauge invariant interpolating operators
Journal of High Energy Physics, 2022 Standard interpolating operators for charged mesons, e.g. J B = b ¯ $$ \overline{b} $$ iγ 5 u for B − , are not gauge invariant in QED and therefore problematic for perturbative methods.
Saad Nabeebaccus, Roman Zwicky
doaj +1 more source
Journal of High Energy Physics, 2021 We analyze in detail the physics potential of an experiment like the one recently proposed by the vIOLETA collaboration: a kilogram-scale Skipper CCD detector deployed 12 meters away from a commercial nuclear reactor core.
Guillermo Fernandez-Moroni +5 more
doaj +1 more source
Simulations of laser-driven strong-field QED with Ptarmigan: Resolving wavelength-scale interference and γ -ray polarization [PDF]
Physics of Plasmas, 2023 Accurate modeling is necessary to support precision experiments investigating strong-field QED phenomena. This modeling is particularly challenging in the transition between the perturbative and nonperturbative regimes, where the normalized laser ...
T. Blackburn, B. King, S. Tang
semanticscholar +1 more source
, 2021 Version of MELA that implements the evolution of all leptons (electrons/muons/taus) in pure QED up to ...
Stefano Carrazza, Valerio Bertone
core +1 more source
Towards a precision calculation of the effective number of neutrinos Neff in the Standard Model: the QED equation of state [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 We revisit and quantify in this work several aspects of Standard Model physics at finite temperature that drive the theoretical value of the cosmological parameter, the effective number of neutrinos Neff, away from 3 in the early universe.
Jack J. Bennett +3 more
semanticscholar +1 more source