Results 11 to 20 of about 1,867 (174)
High-precision four-loop mass and wave function renormalization in QED
Physics Letters B, 2020 The 4-loop QED mass and wave function renormalization constants Z2 and Zm have been evaluated in the on-shell subtraction scheme with 1100 digits of precision.
Stefano Laporta
doaj +5 more sources
QED challenges at FCC-ee precision measurements [PDF]
European Physical Journal C: Particles and Fields, 2019 The expected experimental precision of the rates and asymmetries in the Future Circular Collider with electron–positron beams (FCC-ee) in the center of the mass energy range 88–365 GeV considered for construction in CERN, will be better by a factor 5–200.
S. Jadach, M. Skrzypek
doaj +3 more sources
Merging van der Waals Materials and Optical Metasurfaces for Cavity Quantum Electrodynamics. [PDF]
NanophotonicsFlat optical metasurfaces supporting quasi‐bound states in the continuum (qBIC) enable cavity‐like, high‐Q resonances in ultrathin nanostructures. This perspective explores the emergence of cavity quantum electrodynamics in qBIC metasurfaces, specifically those made from ultrathin van der Waals nanostructures, where cavities and emitters are seamlessly
Sortino L, Tittl A, Maier SA.
europepmc +2 more sources
High-precision calculation of the 4-loop contribution to the electron g -2 in QED [PDF]
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2017 14 pages, 3 figures, 3 tables v2: version published in PRL (specified "mass-independent contribution", figure 2 reformatted)
Stefano Laporta
exaly +4 more sources
PHOTOS Monte Carlo: a precision tool for QED correctionsin Z and W decays [PDF]
European Physical Journal C, 2006 We present a discussion of the precision for the PHOTOS Monte Carlo algorithm, with improved implementation of QED interference and multiple-photon radiation. The main application of PHOTOS is the generation of QED radiative corrections in decays of any resonances, simulated by a "host" Monte Carlo generator.
P Golonka, Z Was, Was Z
exaly +3 more sources
Precision Spectroscopy in He as a Test of QED
Physica Scripta, 1999 High-resolution laser-based measurements of energy levels have spurred the development and refinement of quantum electrodynamic calculations. We have extended very-high-resolution laser spectroscopy techniques into the vacuum ultraviolet wavelength region at λ ≈ 120 nm to determine the Lamb shift in the ground state of He I.
S D Bergeson, K G H Baldwin, S L Rolston
exaly +2 more sources
From theory to precision modelling of strong-field QED in the transition regime
Journal of Physics: Conference Series, 2022 Abstract The combination of energetic electron beams, delivered from conventional accelerators at a high repetition rate, and ultraintense lasers, makes it possible to perform precision measurements of strong-field QED. The LUXE collaboration aims to perform precision measurements of nonlinear Compton scattering and Breit-Wheeler pair ...
Alexander J Macleod
exaly +3 more sources
High precision hyperfine measurements in Bismuth challenge bound-state strong-field QED
Nature Communications, 2017 AbstractElectrons bound in highly charged heavy ions such as hydrogen-like bismuth 209Bi82+ experience electromagnetic fields that are a million times stronger than in light atoms. Measuring the wavelength of light emitted and absorbed by these ions is therefore a sensitive testing ground for quantum electrodynamical (QED) effects and especially the ...
Johannes Ullmann +2 more
exaly +7 more sources
Power-enhanced leading-logarithmic QED corrections to B q → μ + μ −
Journal of High Energy Physics, 2019 We provide a systematic treatment of the previously discovered power- enhanced QED corrections to the leptonic decay B q → μ + μ − (q = d, s) in the frame- work of soft-collinear effective theory (SCET).
Martin Beneke +2 more
doaj +3 more sources
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