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Observation of doubly charmed B decays at LEP

ALEPH Collaboration, The and Barate, R. and Betteridge, Andrew and Bowdery, Christopher and Colrain, Paul and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Williams, Mark (1998) Observation of doubly charmed B decays at LEP. The European Physical Journal C (EPJ C) - Particles and Fields, 4 (3). pp. 387-407. ISSN 1434-6052

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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→DsD¯(X) and B→DD¯(X) (where D can be either a D 0 , a D + or a D ∗+ ), providing the first direct evidence for doubly-charmed B decays involving no Ds production. Evidence for associated K0S and K± production in the decays B→DD¯(X) is also presented and some candidates for completely reconstructed decays B→DsD¯(nπ) , B→DD¯K0S and B→DD¯K± 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.

Item Type: Article
Journal or Publication Title: The European Physical Journal C (EPJ C) - Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63988
Deposited By: ep_importer_pure
Deposited On: 20 May 2013 11:23
Refereed?: Yes
Published?: Published
Last Modified: 17 Nov 2017 11:25
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63988

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