Measurement of the Cross Section of W-boson pair production at LEP;

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doi:10.1016/j.physletb.2004.08.060

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The cross section of W-boson pair-production is measured with the L3 detector at LEP. In a data sample corresponding to a total luminosity of 629.4 pb(-1), collected at centre-of-mass energies ranging from 189 to 209 GeV, 9834 four-fermion events with W bosons decaying into hadrons or leptons are selected. The total cross section is measured with a precision of 1.4% and agrees with the Standard Model expectation. Assuming charged-lepton universality, the branching fraction for hadronic W-boson decays is measured to be: Br(W --> hadrons) = 67.50 +/- 0.42(stat.) +/- 0.30(syst.)%, in agreement with the Standard Model. Differential cross sections as a function of the W- production angle are also measured for the semi-leptonic channels qqev and qqmuv.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/1002663

Titolo:	Measurement of the Cross Section of W-boson pair production at LEP;
Autori interni:	GUIDA, Michele QUARTIERI, Joseph
Data di pubblicazione:	2004
Rivista:	PHYSICS LETTERS. SECTION B
Abstract:	The cross section of W-boson pair-production is measured with the L3 detector at LEP. In a data sample corresponding to a total luminosity of 629.4 pb(-1), collected at centre-of-mass energies ranging from 189 to 209 GeV, 9834 four-fermion events with W bosons decaying into hadrons or leptons are selected. The total cross section is measured with a precision of 1.4% and agrees with the Standard Model expectation. Assuming charged-lepton universality, the branching fraction for hadronic W-boson decays is measured to be: Br(W --> hadrons) = 67.50 +/- 0.42(stat.) +/- 0.30(syst.)%, in agreement with the Standard Model. Differential cross sections as a function of the W- production angle are also measured for the semi-leptonic channels qqev and qqmuv.
Handle:	http://hdl.handle.net/11386/1002663
Appare nelle tipologie:	1.1.1 Articolo su rivista con DOI

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