A search for doubly-charmed B decays with both charmed mesons reconstructed is performed, using about 3.8 million hadronic Z decays recorded with the ALEPH detector at LEP. A clear signal is observed in the channels B → DsD̄(X) and B → DD̄(X) (where D can be either a D0, a D+ or a D*+), providing the first direct evidence for doubly-charmed B decays involving no Ds production. Evidence for associated KS0 and K± production in the decays B → DD̄(X) is also presented some candidates for completely reconstructed decays B → DsD̄(nπ), B→ DD̄KS0 and B → DD̄K± are observed. Furthermore, candidates for the two-body Cabibbo suppressed decays B0 → D*-D*+ and B- → D(*)0D(* )- are also observed. Measurements of the corresponding branching fractions are extracted.

Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1998). Observation of doubly-charmed B decays at LEP. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 4(3), 387-407 [10.1007/s100520050216].

Observation of doubly-charmed B decays at LEP

CARPINELLI, Massimo;
1998

Abstract

A search for doubly-charmed B decays with both charmed mesons reconstructed is performed, using about 3.8 million hadronic Z decays recorded with the ALEPH detector at LEP. A clear signal is observed in the channels B → DsD̄(X) and B → DD̄(X) (where D can be either a D0, a D+ or a D*+), providing the first direct evidence for doubly-charmed B decays involving no Ds production. Evidence for associated KS0 and K± production in the decays B → DD̄(X) is also presented some candidates for completely reconstructed decays B → DsD̄(nπ), B→ DD̄KS0 and B → DD̄K± are observed. Furthermore, candidates for the two-body Cabibbo suppressed decays B0 → D*-D*+ and B- → D(*)0D(* )- are also observed. Measurements of the corresponding branching fractions are extracted.
Articolo in rivista - Articolo scientifico
ALEPH detector
English
1998
4
3
387
407
none
Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1998). Observation of doubly-charmed B decays at LEP. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 4(3), 387-407 [10.1007/s100520050216].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390090
Citazioni
  • Scopus 24
  • ???jsp.display-item.citation.isi??? 26
Social impact