The measurements of R(b) = sigma(e(+)e(-) --> b (b) over bar)/sigma(e(+)e(-) --> q (q) over bar) and of the b quark forward-backward charge asymmetry, A(fb)(b), at centre-of-mass energies above the Z pole an described. The measurement of R(b) is performed at root s between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons, The measurement of A(fb)(b) is performed using the large statistics event sample collected at root s = 189 GeV with a lepton-tag analysis based on the selection of prompt muons and electrons. The results at root 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.). (C) 2000 Elsevier Science B.V, All rights reserved.

Measurements of the b(b)over-bar production cross section and forward-backward asymmetry at centre-of-mass energies above the Z pole at LEP / M. Acciarri, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, G. Ambrosi, H. Anderhub, V. P. Andreev, T. Angelescu, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, A. Bajo, L. Baksay, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 485:(2000), pp. 71-84. [10.1016/S0370-2693(00)00676-6]

Measurements of the b(b)over-bar production cross section and forward-backward asymmetry at centre-of-mass energies above the Z pole at LEP

ADRIANI, OSCAR;BECATTINI, FRANCESCO;D'ALESSANDRO, RAFFAELLO;
2000

Abstract

The measurements of R(b) = sigma(e(+)e(-) --> b (b) over bar)/sigma(e(+)e(-) --> q (q) over bar) and of the b quark forward-backward charge asymmetry, A(fb)(b), at centre-of-mass energies above the Z pole an described. The measurement of R(b) is performed at root s between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons, The measurement of A(fb)(b) is performed using the large statistics event sample collected at root s = 189 GeV with a lepton-tag analysis based on the selection of prompt muons and electrons. The results at root 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.). (C) 2000 Elsevier Science B.V, All rights reserved.
2000
485
71
84
M. Acciarri;P. Achard;O. Adriani;M. Aguilar-Benitez;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;M. G. Alviggi;G. Ambrosi;H. Anderhub;V. P. ...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/774937
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