Title
Measurement of Vcb from the decay process B̄0 → D*+ℓ-v̄
Date Issued
21 June 2001
Access level
open access
Resource Type
journal article
Author(s)
Abreu P.
Adam W.
Adye T.
Adzic P.
Albrecht Z.
Alderweireld T.
Alekseev G.D.
Alemany R.
Allmendinger T.
Allport P.P.
Almehed S.
Amaldi U.
Amapane N.
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.
Ballestrero A.
Bambade P.
Barao F.
Barbiellini G.
Barbier R.
Bardin D.Y.
Barker G.
Baroncelli A.
Battaglia M.
Baubillier M.
Becks K.H.
Begalli M.
Behrmann A.
Beilliere P.
Belokopytov Y.
Belous K.
Benekos N.C.
Benvenuti A.C.
Berat C.
Berggren M.
Berntzon L.
Bertrand D.
Besancon M.
Bilenky M.S.
Bizouard M.A.
Bloch D.
Blom H.M.
Bonesini M.
Boonekamp M.
Booth P.S.L.
Borisov G.
Bosio C.
Botner O.
Boudinov E.
Bouquet B.
Bourdarios C.
Bowcock T.J.V.
Boyko I.
Bozovic I.
Bozzo M.
Bracko M.
Branchini P.
Brenner R.A.
Bruckman P.
Brunet J.M.
Bugge L.
Buran T.
Buschbeck B.
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.
Chapkin M.
Charpentier P.
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.
Cossutti F.
Publisher(s)
Elsevier B.V.
Abstract
A new precise measurement of |Vcb| and of the branching ratio BR(B̄0 → D*+ℓ-v̄ℓ) has been performed using a sample of about 5000 semileptonic decays B̄0 → D*+ℓ-v̄ℓ, selected by the DELPHI detector at LEP I by tagging the soft pion from D*+ → D0π+. The results are: Vcb = (39.0 ± 1.5 (stat.)-2.6+2.5 (syst. exp.) ± 1.3 (syst. th.)) × 10-3, BR(B̄0 → D*+ℓ-v̄ℓ) = (4.70 ± 0.13 (stat.)-0.31+0.36 (syst. exp.))%. The analytic dependencies of the differential cross-section and of the Isgur-Wise form factor as functions of the variable w = vB0 · vD* have also been obtained by unfolding the experimental resolution. © 2001 Published by Elsevier Science B.V.
Start page
55
End page
74
Volume
510
Issue
April 1
Language
English
OCDE Knowledge area
Física nuclear
Física de partículas, Campos de la Física
Scopus EID
2-s2.0-0035927446
Source
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN of the container
03702693
Sponsor(s)
We wish to thank D. Ebert, G. Faustov, B. Grinstein, Z. Ligeti, M. Neubert and M. Wise for useful discussions, and R. Lebed for kindly providing the code describing his model. We are greatly indebted to our technical collaborators, to the members of the CERN-SL Division for the excellent performance of the LEP collider, and to the funding agencies for their support in building and operating the DELPHI detector. We acknowledge in particular the support of Austrian Federal Ministry of Education, Science and Culture, GZ 616.364/2-III/2a/98, FNRS-FWO, Flanders Institute to encourage scientific and technological research in the industry (IWT), Belgium, FINEP, CNPq, CAPES, FUJB and FAPERJ, Brazil, Czech Ministry of Industry and Trade, GA CR 202/96/0450 and GA AVCR A1010521, Commission of the European Communities (DG XII), Direction des Sciences de la Matière, CEA, France, Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie, Germany, General Secretariat for Research and Technology, Greece, National Science Foundation (NWO) and Foundation for Research on Matter (FOM), The Netherlands, Norwegian Research Council, State Committee for Scientific Research, Poland, 2P03B06015, 2P03B11116 and SPUB/P03/DZ3/99, JNICT-Junta Nacional de Investigação Cientı́fica e Tecnológica, Portugal, Vedecka grantova agentura MS SR, Slovakia, Nr. 95/5195/134, Ministry of Science and Technology of the Republic of Slovenia, CICYT, Spain, AEN96-1661 and AEN96-1681, The Swedish Natural Science Research Council, Particle Physics and Astronomy Research Council, UK, Department of Energy, USA, DE-FG02-94ER40817.
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Directorio de Producción Científica
Scopus