Measurement of the forward backward asymmetry of c and b quarks at the Z pole using reconstructed D mesons

Abreu P.; Adye T.; Adzic P.; Albrecht Z.; Alderweireld T.; Alekseev G.D.; Alemany R.; Allmendinger T.; Allport P.P.; Almehed S.; Amaldi U.; Amato S.; Anassontzis E.G.; Andersson P.; Andreazza A.; Andringa S.; Antilogus P.; Apel W.D.; Arnoud Y.; Åsman B.; Augustin J.E.; Augustinus A.; Baillon P.; Bambade P.; Barao F.; Barbiellini G.; Barbier R.; Bardin D.Y.; Barker G.; Baroncelli A.; Battaglia M.; Baubillier M.; Becks K.H.; Begalli M.; Beilliere P.; Belokopytov Y.; Belous K.; Benvenuti A.C.; Berat C.; Berggren M.; Bertini D.; Bertrand D.; Besancon M.; Bianchi F.; Bigi M.; Bilenky M.S.; Bizouard M.A.; Bloch D.; Blom H.M.; Bonesini M.; Bonivento W.; Boonekamp M.; Booth P.S.L.; Borgland A.W.; Borisov G.; Bosio C.; Botner O.; Boudinov E.; Bouquet B.; Bourdarios C.; Bowcock T.J.V.; Boyko I.; Bozovic I.; Bozzo M.; Branchini P.; Brenke T.; Brenner R.A.; Bruckman P.; Brunet J.M.; Bugge L.; Buran T.; Burgsmueller T.; Buschmann P.; Cabrera S.; Caccia M.; Calvi M.; Camporesi T.; Canale V.; Carena F.; Carroll L.; Caso C.; Castillo Gimenez M.V.; Cattai A.; Cavallo F.R.; Chabaud V.; Chapkin M.; Charpentier P.; Chaussard L.; Checchia P.; Chelkov G.A.; Chierici R.; Chliapnikov P.; Chochula P.; Chorowicz V.; Chudoba J.; Cieslik K.; Collins P.; Contri R.; Cortina E.; Cosme G.

Title

Date Issued

01 January 1999

Access level

metadata only access

Resource Type

journal article

Author(s)

Abreu P.

Adye T.

Adzic P.

Albrecht Z.

Alderweireld T.

Alekseev G.D.

Alemany R.

Allmendinger T.

Allport P.P.

Almehed S.

Amaldi U.

Amato S.

Anassontzis E.G.

Andersson P.

Andreazza A.

Andringa S.

Antilogus P.

Apel W.D.

Arnoud Y.

Åsman B.

Augustin J.E.

Augustinus A.

Baillon P.

Bambade P.

Barao F.

Barbiellini G.

Barbier R.

Bardin D.Y.

Barker G.

Baroncelli A.

Battaglia M.

Baubillier M.

Becks K.H.

Begalli M.

Beilliere P.

Belokopytov Y.

Belous K.

Benvenuti A.C.

Berat C.

Berggren M.

Bertini D.

Bertrand D.

Besancon M.

Bianchi F.

Bigi M.

Bilenky M.S.

Bizouard M.A.

Bloch D.

Blom H.M.

Bonesini M.

Bonivento W.

Boonekamp M.

Booth P.S.L.

Borgland A.W.

Borisov G.

Bosio C.

Botner O.

Boudinov E.

Bouquet B.

Bourdarios C.

Bowcock T.J.V.

Boyko I.

Bozovic I.

Bozzo M.

Branchini P.

Brenke T.

Brenner R.A.

Bruckman P.

Brunet J.M.

Bugge L.

Buran T.

Burgsmueller T.

Buschmann P.

Cabrera S.

Caccia M.

Calvi M.

Camporesi T.

Canale V.

Carena F.

Carroll L.

Caso C.

Castillo Gimenez M.V.

Cattai A.

Cavallo F.R.

Chabaud V.

Chapkin M.

Charpentier P.

Chaussard L.

Checchia P.

Chelkov G.A.

Chierici R.

Chliapnikov P.

Chochula P.

Chorowicz V.

Chudoba J.

Cieslik K.

Collins P.

Contri R.

Cortina E.

Cosme G.

Publisher(s)

Springer New York LLC

Abstract

A measurement of the forward-backward asymmetry of e+e- → cc̄ and e+e- → bb̄ on the Z resonance is performed using about 3.5 million hadronic Z decays collected by the DELPHI detector at LEP in the years 1992 to 1995. The heavy quark is tagged by the exclusive reconstruction of several D meson decay modes. The forward-backward asymmetries for c and b quarks at the Z resonance are determined to be: AcFB(√s = 91.235GeV) = 0.0659 ± 0.0094 (stat) ± 0.0035 (syst) AbFB(√s = 91.235 GeV) = 0.0762 ± 0.0194 (stat) ± 0.0085 (syst) AcFB(√s = 89.434 GeV) = -0.0496 ± 0.0368 (stat) ± 0.0053 (syst) AbFB(√s = 89.434 GeV) = 0.0567 ± 0.0756 (stat) ± 0.0117 (syst) AcFB(√s = 92.990 GeV) = 0.1180 ± 0.0318 (stat) ± 0.0062 (syst) AbFB(√s = 92.990 GeV) = 0.0882 ± 0.0633 (stat) ± 0.0122 (syst) The combination of these results leads to an effective electroweak mixing angle of: sin2 θlepteff = 0.2332 ± 0.0016.

Start page

219

End page

237

Volume

10

Issue

2

Language

English

OCDE Knowledge area

Física nuclear Física de partículas, Campos de la Física

DOI

10.1007/s100529900122

Scopus EID

2-s2.0-0000792329

Source

European Physical Journal C

ISSN of the container

14346044

Sources of information: Directorio de Producción Científica Scopus

Options