Soft Photon Radiation in Particle Decays in SHERPA

Details Soft Photon Radiation in Particle Decays in SHERPA Soft Photon Radiation in Particle Decays in SHERPA

2008-10-28

arxiv.org/abs/0810.5071v2

JHEP 0812:018,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

59 pages, 12 figures, 5 tables, published version (typos corrected)

Scientific paper

10.1088/1126-6708/2008/12/018

In this paper the Yennie-Frautschi-Suura approach is used to simulate real and virtual QED corrections in particle decays. It makes use of the universal structure of soft photon corrections to resum the leading logarithmic QED corrections to all orders, and it allows a systematic correction of this approximate result to exact fixed order results from perturbation theory. The approach has been implemented as a Monte Carlo algorithm, which a posteriori modifies decay matrix elements through the emission of varying numbers of photons. The corresponding computer code is incorporated into the SHERPA event generator framework.

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