Abstract
The production of wrong sign charmed mesons b → D(s)X, D(s) = (D0, D+, Ds), is studied using the data collected by the DELPHI experiment in the years 1994 and 1995. Charmed mesons in Z → bb events are exclusively reconstructed by searching for the decays D0 → K-π+, D+ → K-π+π+ and Ds+ φπ+ → K+K-π+. The wrong sign contribution is extracted by using two discriminant variables: the charge of the b-quark at decay time, estimated from the charges of identified particles, and the momentum of the charmed meson in the rest frame of the b-hadron. The inclusive branching fractions of b-hadrons into wrong sign charm mesons are measured to be: B(b → D0X) + B(b → D-X) = (9.3 ± 1.7(stat) ± 1.3(syst) ± 0.4(B))%, B(b → Ds-X) = (10.1 ± 0.4(B))%, B(b → Ds-X) = (10.1 ± 1.0(stat) ± 0.6(syst) ± 2.8(B))% where the first error is statistical, the second and third errors are systematic.
Original language | English (US) |
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Pages (from-to) | 26-40 |
Number of pages | 15 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 561 |
Issue number | 1-2 |
DOIs | |
State | Published - May 22 2003 |
Funding
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/ 99/1362; 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, SPUB-M/CERN/PO3/DZ296/2000 and SPUB-M/ CERN/PO3/DZ297/2000; 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, AEN99-0950 and AEN99-0761; The Swedish Natural Science Research Council; Particle Physics and Astronomy Research Council, UK; Department of Energy, USA, DE-FG02-94ER40817.
ASJC Scopus subject areas
- Nuclear and High Energy Physics