Results 11 to 20 of about 4,848 (208)

Electron-positron annihilation to photons at O(α3) revisited [PDF]

Nuclear Physics B, 2020
We apply the modern multiloop methods to the calculation of the total cross sections of electron-positron annihilation to 2 and 3 photons exactly in s/m2 with the accuracy O(α3). Examining the asymptotics of our results, we find agreement with Ref.
Roman N. Lee
doaj   +2 more sources

Electron–positron annihilation into hadrons at the higher-loop levels [PDF]

European Physical Journal C: Particles and Fields, 2017
The strong corrections to the R-ratio of electron–positron annihilation into hadrons are studied at the higher-loop levels. Specifically, the derivation of a general form of the commonly employed approximate expression for the R-ratio (which constitutes ...
A. V. Nesterenko
doaj   +3 more sources

Energy–energy correlation in electron–positron annihilation at NNLL + NNLO accuracy [PDF]

European Physical Journal C: Particles and Fields, 2017
We present the computation of energy–energy correlation in $$e^+e^-$$ e + e - collisions in the back-to-back region at next-to-next-to-leading logarithmic accuracy matched with the next-to-next-to-leading order perturbative prediction.
Zoltán Tulipánt, Adam Kardos, Gábor Somogyi   +2 more
doaj   +2 more sources

Soft-drop event shapes in electron–positron annihilation at next-to-next-to-leading order accuracy [PDF]

Physics Letters B, 2018
We present predictions for soft-drop event shapes of hadronic final states in electron–positron annihilation at next-to-next-to-leading order accuracy in perturbation theory obtained using the CoLoRFulNNLO subtraction method.
Adam Kardos, Gábor Somogyi, Zoltán Trócsányi   +2 more
doaj   +2 more sources

Electron-positron annihilation into two photons in an intense plane-wave field [PDF]

Physical Review D, 2020
The process of electron-positron annihilation into two photons in the presence of an intense classical plane wave of an arbitrary shape is investigated analytically by employing light-cone quantization and by taking into account the effects of the plane ...
Sergey Bragin, A. Di Piazza
openalex   +3 more sources

Two body final states production in electron-positron annihilation and their contributions to (g − 2)μ [PDF]

Journal of High Energy Physics, 2023
In this paper, we study the processes of e+e− annihilation into two body final states, either two pseudoscalar mesons or one meson with a photon. The hadronic vacuum polarization form factors are calculated within the framework of resonance chiral theory
Shi-Jia Wang, Zhen Fang, L. Dai
semanticscholar   +1 more source

Decoherence Puzzle in Measurements of Photons Originating from Electron-Positron Annihilation [PDF]

Acta Physica Polonica. A, 2022
Entanglement of photons originating from the electron-positron annihilation has not been proven experimentally. Though the independent experiments performed so far unanimously confirm that correlation between the linear polarizations of back-to-back ...
Sushil Sharma, Deepak Kumar, P. Moskal
semanticscholar   +1 more source

Locally finite two-loop amplitudes for off-shell multi-photon production in electron-positron annihilation [PDF]

Journal of High Energy Physics, 2020
We study the singularity structure of two-loop QED amplitudes for the production of multiple off-shell photons in massless electron-positron annihilation and develop counterterms that remove their infrared and ultraviolet divergences point by point in ...
C. Anastasiou, Rayan Haindl, G. Sterman, Zhou Yang, M. Zeng   +4 more
semanticscholar   +1 more source

Asymmetries in Processes of Electron-Positron Annihilation [PDF]

Symmetry, 2020
Processes of electron–positron annihilation into a pair of fermions were considered. Forward–backward and left–right asymmetries were studied, taking into account polarization of initial and final particles.
A. Arbuzov, S. Bondarenko, L. Kalinovskaya   +2 more
semanticscholar   +1 more source

Polarization and entanglement in baryon–antibaryon pair production in electron–positron annihilation [PDF]

Nature Physics, 2018
Particles directly produced at electron–positron colliders, such as the J/ψ meson, decay with relatively high probability into a baryon–antibaryon pair1. For spin-1/2 baryons, the pair can have the same or opposite helicites.
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