Electroweak corrections uncertainty on the W mass measurement at LEP

Details Electroweak corrections uncertainty on the W mass measurement at LEP Electroweak corrections uncertainty on the W mass measurement at LEP

2005-05-27

arxiv.org/abs/hep-ph/0505232v1

Eur.Phys.J.C44:383-393,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 3 figures

Scientific paper

10.1140/epjc/s2005-02378-6

The systematic uncertainty on the W mass and width measurement resulting from the imperfect knowledge of electroweak radiative corrections is discussed. The intrinsic uncertainty in the 4-f generator used by the DELPHI Collaboration is studied following the guidelines of the authors of YFSWW, on which its radiative corrections part is based. The full DELPHI simulation, reconstruction and analysis chain is used for the uncertainty assessment. A comparison with the other available 4-f calculation implementing DPA O(alpha) corrections, RacoonWW, is also presented. The uncertainty on the W mass is found to be below 10 MeV for all the WW decay channels used in the measurement.

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