# W Mass and its Uncertainty from Modelling the Hadronic Final State at LEP

Source: [W Mass and its Uncertainty from Modelling the Hadronic Final State at LEP](<https://www.sota2.com/research/paper/68fa1ed77a2b558e29324fc5>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-23T16:09:38.888Z

Authors: K. Rabbertz

Published: 2002-05-17T13:50:25.000Z

## Abstract

From 1996 up to 2000 the LEP collider at CERN has operated at center of mass energies above the production threshold for W boson pairs of approximately 160 GeV. The obtained data are used to extract a preliminary W mass value of (80.450 +- 0.039) GeV by direct reconstruction. To a large extent the uncertainty is due to systematic effects especially in the fully hadronic decay channel W+W- --\> qq' qq' that suffers most from ambiguities in modelling the hadronic final state. Methods to assess and reduce these uncertainties are the current main concern of the four LEP experiments.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-ex/0205059>)

[PDF](<https://arxiv.org/pdf/hep-ex/0205059.pdf>)