Combination of CDF and D0 Results on the Width of the W boson
The Tevatron Electroweak Working Group
TL;DR
This paper combines multiple measurements from Tevatron experiments to provide a precise estimate of the W boson width, accounting for differences in analysis assumptions.
Contribution
It presents a combined analysis of W boson width measurements from CDF and D0, improving the precision of the Tevatron average.
Findings
Tevatron average W boson width: 2046 ± 49 MeV
Combined data from RunI and RunII experiments
Results corrected for analysis inconsistencies
Abstract
We summarize and combine direct measurements of the width of the W boson in data collected by the Tevatron experiments CDF and D0 at Fermilab. Results from CDF and D0 RunI (1992-1995) have been combined with the CDF 200 pb^-1 results from the first period of RunII (2001-2004) and the recent 1 fb^-1 result in the electron channel from D0 (2002-2006). The results are corrected for any inconsistencies in parton distribution functions and assumptions about electroweak parameters used in the different analyses. The resulting Tevatron average for the width of the W boson is Gamma_W = 2,046 +- 49.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research