We present an analysis of data from p ($) over bar p collisions at a center-of-mass energy of root s = 1800 GeV. A measurement is made of the ratio R = sigma B(p ($) over bar p --> W --> ev)/sigma B(p ($) over bar p --> Z(0) --> ee). The data represent 19.6 pb(-1) collected by the Collider Detector at Fermilab during the 1992-1993 collider run of the Fermilab Tevatron. We find R = 10.90 +/- 0.32(stat)+/-0.29(syst), and from this value we extract a measurement of the W --> ev branching ratio Gamma(W --> ev)/Gamma(W) = 0.1094+/-0.0033(stat)+/-0.0031(syst). From this branching ratio we set a limit on the top quark mass of mt > 62 GeV/c(2) at the 95% confidence level. In contrast with direct searches for the top quark, this limit makes no assumptions about the allowed decay modes of the top quark. In addition, we use a calculation of the leptonic width Gamma(W --> ev) to obtain a value for the W total decay width:Gamma(W) = 2.064+/-0.060(stat)+/-0.059(syst) GeV.

Measurement of the ratio B(ppWe)/B(ppZ0ee) in pp collisions at s =1800 GeV

DONATI, SIMONE;PUNZI, GIOVANNI;
1995-01-01

Abstract

We present an analysis of data from p ($) over bar p collisions at a center-of-mass energy of root s = 1800 GeV. A measurement is made of the ratio R = sigma B(p ($) over bar p --> W --> ev)/sigma B(p ($) over bar p --> Z(0) --> ee). The data represent 19.6 pb(-1) collected by the Collider Detector at Fermilab during the 1992-1993 collider run of the Fermilab Tevatron. We find R = 10.90 +/- 0.32(stat)+/-0.29(syst), and from this value we extract a measurement of the W --> ev branching ratio Gamma(W --> ev)/Gamma(W) = 0.1094+/-0.0033(stat)+/-0.0031(syst). From this branching ratio we set a limit on the top quark mass of mt > 62 GeV/c(2) at the 95% confidence level. In contrast with direct searches for the top quark, this limit makes no assumptions about the allowed decay modes of the top quark. In addition, we use a calculation of the leptonic width Gamma(W --> ev) to obtain a value for the W total decay width:Gamma(W) = 2.064+/-0.060(stat)+/-0.059(syst) GeV.
1995
Abe, F.; Albrow, M. G.; Amendolia, S. R.; Amidei, D.; Antos, J.; Anway Wiese, C.; Apollinari, G.; Areti, H.; Atac, M.; Auchincloss, P.; Azfar, F.; Azz...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/757067
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