Measurement of the W-pair Production Cross-section and W Branching Ratios in e+e- Collisions at sqrt(s) = 161-209 GeV

TL;DR

This paper reports precise measurements of W-pair production cross-sections and decay branching ratios at LEP2 energies, testing the Standard Model's predictions with new data that supersede previous results.

Contribution

First comprehensive set of W-pair production and decay measurements at LEP2 energies by DELPHI, providing updated data that improve upon previous results.

Findings

Measured W-pair production cross-sections up to 209 GeV

Determined W decay branching ratios consistent with Standard Model

Extracted CKM matrix element |V_{cs}| from data

Abstract

These final results on e+e- -> W+W- production cross-section measurements at LEP2 use data collected by the DELPHI detector at centre-of-mass energies up to 209 GeV. Measurements of total cross-sections, W angular differential distributions and decay branching fractions, and the value of the CKM element |V_{cs}| are compared to the expectations of the Standard Model. These results supersede all values previously published by DELPHI.