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A measurement of the b¯b forward-backward asymmetry using the semileptonic decay into muons

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A measurement of the b¯b forward-backward asymmetry using the semileptonic decay into muons

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dc.contributor.author	DELPHI Collaboration
dc.contributor.author	Allen, Paul
dc.contributor.author	Benlloch Baviera, José María
dc.contributor.author	Castillo Giménez, María Victoria
dc.contributor.author	Fez Laso, M. D. M. de
dc.contributor.author	Ferrer Soria, Antonio
dc.contributor.author	Fuster Verdú, Juan A.
dc.contributor.author	García García, Carmen
dc.contributor.author	Gómez Cadenas, Juan José
dc.contributor.author	Hernández Rey, Juan José
dc.contributor.author	Higón Rodríguez, Emilio
dc.contributor.author	Lozano Bahilo, José Julio
dc.contributor.author	Lacasta Llácer, Carlos
dc.contributor.author	Martí García, Salvador
dc.contributor.author	Llosá Reig, Rafael
dc.contributor.author	Sánchez Rojo, María Ester
dc.contributor.author	Salt Cairols, José
dc.contributor.author	Valls Ferrer, Juan Antonio
dc.contributor.author	Zúñiga Román, Juan
dc.date.accessioned	2016-05-27T09:19:12Z
dc.date.available	2016-05-27T09:19:12Z
dc.date.issued	1992
dc.identifier.citation	DELPHI Collaboration Allen, Paul Benlloch Baviera, José María Castillo Giménez, María Victoria Fez Laso, M. D. M. de Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gómez Cadenas, Juan José Hernández Rey, Juan José Higón Rodríguez, Emilio Lozano Bahilo, José Julio Lacasta Llácer, Carlos Martí García, Salvador Llosá Reig, Rafael Sánchez Rojo, María Ester Salt Cairols, José Valls Ferrer, Juan Antonio Zúñiga Román, Juan 1992 A measurement of the b¯b forward-backward asymmetry using the semileptonic decay into muons Physics Letters B 276 4 536 546
dc.identifier.uri	http://hdl.handle.net/10550/53843
dc.description.abstract	The forward-backward asymmetry of bottom quarks is measured with statistics of approximately 80 000 hadronic Z0 decays produced in e+e- collisions at a centre of mass energy of square-root s almost-equal-to M(z). The tagging of b quark events has been performed using the semileptonic decay channel b --> X + mu. Because the asymmetry depends on the weak coupling, this leads to a precise measurement of the electroweak mixing angle sin2 theta(w). The experimental result is A(FB)b = 0.115 +/- 0.043(stat.) +/- 0.013(syst.). After correcting the value for the B0B0BAR mixing this becomes A(FB)b = 0.161 +/- 0.060(stat.) +/- 0.021 (syst.) corresponding to sin2 theta(w)MSBAR = 0.221 +/- 0.011 (stat.) +/- 0.004 (syst.).
dc.language.iso	eng
dc.relation.ispartof	Physics Letters B, 1992, vol. 276, num. 4, p. 536-546
dc.subject	Física nuclear
dc.title	A measurement of the b¯b forward-backward asymmetry using the semileptonic decay into muons
dc.type	journal article	es_ES
dc.date.updated	2016-05-27T09:19:12Z
dc.identifier.doi	10.1016/0370-2693(92)91680-8
dc.identifier.idgrec	070957
dc.rights.accessRights	open access	es_ES