Results 31 to 40 of about 2,798 (204)
The two-loop perturbative correction to the (g − 2) μ HLbL at short distances
Journal of High Energy Physics, 2021 The short-distance behaviour of the hadronic light-by-light (HLbL) contribution to (g − 2) μ has recently been studied by means of an operator product expansion in a background electromagnetic field.
Johan Bijnens +3 more
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Isospin-breaking effects in the three-pion contribution to hadronic vacuum polarization
Journal of High Energy Physics, 2023 Isospin-breaking (IB) effects are required for an evaluation of hadronic vacuum polarization at subpercent precision. While the dominant contributions arise from the e + e − → π + π − channel, also IB in the subleading channels can become relevant for a ...
Martin Hoferichter +3 more
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Isospin-breaking effects in the two-pion contribution to hadronic vacuum polarization
Journal of High Energy Physics, 2022 Isospin-breaking (IB) effects in the two-pion contribution to hadronic vacuum polarization (HVP) can be resonantly enhanced, if related to the interference of the ρ(770) and ω(782) resonances.
Gilberto Colangelo +3 more
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Photon splitting corrections to soft-photon resummation
Journal of High Energy Physics, 2023 In this paper we present an algorithm to add photon-splitting corrections to the Yennie-Frautschi-Suura-style soft-photon resummation available in the Sherpa MonteCarlo event generator.
Lois Flower, Marek Schönherr
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Radiative corrections in e+e− collisions with the BabaYaga event generator
EPJ Web of Conferences, 2017 The Monte Carlo event generator BabaYaga has been developed in the last decade for high precision simulation of QED processes (e+e− → e+e−, e+e− → μ+μ− and e+e− → γγ) at flavour factories, mainly for luminometry purposes, with an estimated theoretical ...
Carloni Calame Carlo M.
doaj +1 more source
Journal of High Energy Physics, 2023 In this article, we consider the transverse momentum (q T ) distribution of W and Z bosons produced in hadronic collisions. We combine the q T resummation for QED and QCD radiation including the QED soft emissions from the W boson in the final state.
Andrea Autieri +3 more
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PRECISION STUDY OF POSITRONIUM: TESTING BOUND STATE QED THEORY [PDF]
International Journal of Modern Physics A, 2004 As an unstable light pure leptonic system, positronium is a very specific probe atom to test bound state QED. In contrast to ordinary QED for free leptons, the bound state QED theory is not so well understood and bound state approaches deserve highly accurate tests.
openaire +3 more sources
Axial-vector transition form factors and e + e − → f 1 π + π −
Journal of High Energy Physics, 2023 We study the transition form factors (TFFs) of axial-vector mesons in the context of currently available experimental data, including new constraints from e + e − → f 1(1285)π + π − that imply stringent limits on the high-energy behavior and, for the ...
Martin Hoferichter +2 more
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QED Bremsstrahlung in decays of electroweak bosons [PDF]
, 2013 Isolated lepton momenta, in particular their directions are the most precisely measured quantities in pp collisions at LHC. This offers opportunities for multitude of precision measurements.
Andrej B. Arbuzov +5 more
core +1 more source
Initial conditions for electron and photon structure and fragmentation functions
Journal of High Energy Physics, 2019 In the computation of short-distance cross sections initiated by electrons and photons one can adopt the so-called structure-function approach, in which these particles play formally the same roles as hadrons do in QCD factorisation theorems, and must ...
S. Frixione
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