Measurement of Abb̄FB in hadronic Z decays using a jet charge technique

Abreu P.; Adam W.; Adye T.; Adzic P.; Albrecht Z.; Aldeweireld 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.; Camacho Rozas A.J.; 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.; Collins P.; Contri R.; Cortina E.

Title

Date Issued

01 January 1999

Access level

metadata only access

Resource Type

journal article

Author(s)

Abreu P.

Adam W.

Adye T.

Adzic P.

Albrecht Z.

Aldeweireld 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.

Camacho Rozas A.J.

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.

Collins P.

Contri R.

Cortina E.

Publisher(s)

Springer New York LLC

Abstract

The bb̄ forward-backward asymmetry has been determined from the average charge flow measured in a sample of 3,500,000 hadronic Z decays collected with the DELPHI detector in 1992 - 1995. The measurement is performed in an enriched bb̄ sample selected using an impact parameter tag and results in the following values for the bb̄ forward-backward asymmetry: Abb̄FB (89.55 GeV) = 0.068 ± 0.018 (stat.) ± 0.0013(syst.) Abb̄FB (91.26 GeV) = 0.0982 ± 0.0047(stat.) ± 0.0016(syst.) Abb̄FB (92.94 GeV) = 0.123 ± 0.016 (stat.) ± 0.0027(syst.) The bb̄ charge separation required for this analysis is directly measured in the b tagged sample, while the other charge separations are obtained from a fragmentation model precisely calibrated to data. The effective weak mixing angle is deduced from the measurement to be: sin2θ1eff = 0.23186 ± 0.00083.

Start page

367

End page

381

Volume

9

Issue

3

Language

English

OCDE Knowledge area

Física nuclear Física de partículas, Campos de la Física

DOI

10.1007/pl00022988

Scopus EID

2-s2.0-0000833530

Source

European Physical Journal C

ISSN of the container

14346044

Sources of information: Directorio de Producción Científica Scopus

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