Measurements of the <math><mtext>b</mtext><mtext>b</mtext><mtext>̄</mtext></math> production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP

Dova, María Teresa; L3 Collaboration

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Measurements of the $b b ̄$ production cross section and forward–backward asymmetry at centre-of-mass energies above the Z pole at LEP

Authors: Dova, María Teresa | L3 Collaboration

2000

Document type: Articulo

Abstract

The measurements of $R_{b} =σ(e^{+} e^{−} → b b ̄)/σ(e^{+} e^{−} → q q ̄)$ and of the b quark forward–backward charge asymmetry, Abfb, at centre-of-mass energies above the Z pole are described. The measurement of Rb is performed at 's between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons. The measurement of Ab is fb performed using the large statistics event sample collected at 's s189 GeV with a lepton-tag analysis based on the selection ' b of prompt muons and electrons. The results at s =189 GeV are $R_{b} =0.163±0.013 (stat.) ±0.005 (syst.)$ , $A_{fb}^{b} =0.61±0.18 (stat.) ±0.09 (syst.)$

General information

Issue date: 13 de julio de 2000

Document language: English

Journal: Physics Letters B; vol. 485, no. 1-3

Origin: Facultad de Ciencias Exactas

ISSN: 0370-2693

Pages: 71-84

xmlui.dri2xhtml.METS-1.0.item-dc-subject: bb production ; Física ; forward-backward asymmetry ; centre-of-mass energies

Subjects: Ciencias Exactas

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Created: 31 de mayo de 2019

Available since: 31 de mayo de 2019

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http://sedici.unlp.edu.ar/handle/10915/75660

https://doi.org/10.1016/S0370-2693(00)00676-6

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