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Exponentiation in QED and Quasi-Stable Charged Particles

Institute of Nuclear Physics Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
Marian Smoluchowski Institute of Physics, Jagiellonian University, ul. Łojasiewicza 11, 30-348 Kraków, Poland
Author to whom correspondence should be addressed.
Symmetry 2019, 11(11), 1389;
Received: 16 October 2019 / Revised: 1 November 2019 / Accepted: 3 November 2019 / Published: 8 November 2019
In this note we present a new exponentiation scheme of soft photon radiation from charged quasi-stable resonances. It generalizes the well established scheme of Yennie, Frautschi and Suura. While keeping the same functional form of an exponent, the new scheme is both exact in its soft limit and accounts properly for the kinematical shift in resonant propagators. We present the scheme on an example of two processes: a toy model of single W production in e ν scattering and the W pair production and decay in e + e annihilation. The latter process is of relevance for the planned FCCee collider where high precision of Monte Carlo simulations is a primary goal. The proposed scheme is a step in this direction. View Full-Text
Keywords: QED; exponentiation; W-boson QED; exponentiation; W-boson
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Jadach, S.; Płaczek, W.; Skrzypek, M. Exponentiation in QED and Quasi-Stable Charged Particles. Symmetry 2019, 11, 1389.

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