Observation of doubly-charmed B decays at LEP

R. Barate; D. Buskulic; D. Decamp; P. Ghez; C. Goy; J. P. Lees; A. Lucotte; E. Merle; M. N. Minard; J. Y. Nief; B. Pietrzyk; R. Alemany; G. Boix; M. P. Casado; M. Chmeissani; J. M. Crespo; M. Delfino; E. Fernandez; M. Fernandez-Bosman; L. Garrido; E. Graugès; A. Juste; M. Martinez; G. Merino; R. Miquel; L. M. Mir; I. C. Park; A. Pascual; J. A. Perlas; I. Riu; F. Sanchez; A. Colaleo; D. Creanza; M. de Palma; G. Gelao; G. Iaselli; G. Maggi; M. Maggi; S. Nuzzo; A. Ranieri; G. Raso; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; A. Tricomi; G. Zito; X. Huang; J. Lin; Q. Ouyang; T. Wang; Y. Xie; R. Xu; S. Xue; J. Zhang; L. Zhang; W. Zhao; D. Abbaneo; U. Becker; P. Bright-Thomas; D. Casper; M. Cattaneo; V. Ciulli; G. Dissertori; H. Drevermann; R. W. Forty; M. Frank; R. Hagelberg; J. B. Hansen; J. Harvey; P. Janot; B. Jost; I. Lehraus; P. Mato; A. Minten; L. Moneta; A. Pacheco; J. F. Pusztaszeri; F. Ranjard; L. Rolandi; D. Rousseau; D. Schlatter; W. Tejessy; F. Teubert; I. R. Tomalin; H. Wachsmuth; Z. Ajaltouni; F. Badaud; G. Chazelle; O. Deschamps; A. Falvard; C. Ferdi; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; S. Monteil; J. C. Montret; D. Pallin

Observation of doubly-charmed B decays at LEP

R. Barate, D. Buskulic, D. Decamp, P. Ghez, C. Goy, J. P. Lees, A. Lucotte, E. Merle, M. N. Minard, J. Y. Nief, B. Pietrzyk, R. Alemany, G. Boix, M. P. Casado, M. Chmeissani, J. M. Crespo, M. Delfino, E. Fernandez, M. Fernandez-Bosman, L. GarridoE. Graugès, A. Juste, M. Martinez, G. Merino, R. Miquel, L. M. Mir, I. C. Park, A. Pascual, J. A. Perlas, I. Riu, F. Sanchez, A. Colaleo, D. Creanza, M. de Palma, G. Gelao, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, U. Becker, P. Bright-Thomas, D. Casper, M. Cattaneo, V. Ciulli, G. Dissertori, H. Drevermann, R. W. Forty, M. Frank, R. Hagelberg, J. B. Hansen, J. Harvey, P. Janot, B. Jost, I. Lehraus, P. Mato, A. Minten, L. Moneta, A. Pacheco, J. F. Pusztaszeri, F. Ranjard, L. Rolandi, D. Rousseau, D. Schlatter, W. Tejessy, F. Teubert, I. R. Tomalin, H. Wachsmuth, Z. Ajaltouni, F. Badaud, G. Chazelle, O. Deschamps, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. C. Montret, D. Pallin

Department of Physics

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22 Citations (Scopus)

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.

Original language	English
Pages (from-to)	387-407
Journal	European Physical Journal C
Volume	4
Issue number	3
Publication status	Published - 1 Jan 1998

Cite this

@article{4bb6478bc66c46528008ca21dc135468,

title = "Observation of doubly-charmed B decays at LEP",

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 → Ds{\=D}(X) and B → D{\=D}(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 → D{\=D}(X) is also presented some candidates for completely reconstructed decays B → Ds{\=D}(nπ), B→ D{\=D}KS0 and B → D{\=D}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.",

author = "R. Barate and D. Buskulic and D. Decamp and P. Ghez and C. Goy and Lees, {J. P.} and A. Lucotte and E. Merle and Minard, {M. N.} and Nief, {J. Y.} and B. Pietrzyk and R. Alemany and G. Boix and Casado, {M. P.} and M. Chmeissani and Crespo, {J. M.} and M. Delfino and E. Fernandez and M. Fernandez-Bosman and L. Garrido and E. Graug{\`e}s and A. Juste and M. Martinez and G. Merino and R. Miquel and Mir, {L. M.} and Park, {I. C.} and A. Pascual and Perlas, {J. A.} and I. Riu and F. Sanchez and A. Colaleo and D. Creanza and {de Palma}, M. and G. Gelao and G. Iaselli and G. Maggi and M. Maggi and S. Nuzzo and A. Ranieri and G. Raso and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and A. Tricomi and G. Zito and X. Huang and J. Lin and Q. Ouyang and T. Wang and Y. Xie and R. Xu and S. Xue and J. Zhang and L. Zhang and W. Zhao and D. Abbaneo and U. Becker and P. Bright-Thomas and D. Casper and M. Cattaneo and V. Ciulli and G. Dissertori and H. Drevermann and Forty, {R. W.} and M. Frank and R. Hagelberg and Hansen, {J. B.} and J. Harvey and P. Janot and B. Jost and I. Lehraus and P. Mato and A. Minten and L. Moneta and A. Pacheco and Pusztaszeri, {J. F.} and F. Ranjard and L. Rolandi and D. Rousseau and D. Schlatter and W. Tejessy and F. Teubert and Tomalin, {I. R.} and H. Wachsmuth and Z. Ajaltouni and F. Badaud and G. Chazelle and O. Deschamps and A. Falvard and C. Ferdi and P. Gay and C. Guicheney and P. Henrard and J. Jousset and B. Michel and S. Monteil and Montret, {J. C.} and D. Pallin",

year = "1998",

month = jan,

day = "1",

language = "English",

volume = "4",

pages = "387--407",

number = "3",

}

Barate, R, Buskulic, D, Decamp, D, Ghez, P, Goy, C, Lees, JP, Lucotte, A, Merle, E, Minard, MN, Nief, JY, Pietrzyk, B, Alemany, R, Boix, G, Casado, MP, Chmeissani, M, Crespo, JM , Delfino, M, Fernandez, E, Fernandez-Bosman, M, Garrido, L, Graugès, E, Juste, A, Martinez, M, Merino, G, Miquel, R, Mir, LM, Park, IC, Pascual, A, Perlas, JA, Riu, I, Sanchez, F, Colaleo, A, Creanza, D, de Palma, M, Gelao, G, Iaselli, G, Maggi, G, Maggi, M, Nuzzo, S, Ranieri, A, Raso, G, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Tricomi, A, Zito, G, Huang, X, Lin, J, Ouyang, Q, Wang, T, Xie, Y, Xu, R, Xue, S, Zhang, J, Zhang, L, Zhao, W, Abbaneo, D, Becker, U, Bright-Thomas, P, Casper, D, Cattaneo, M, Ciulli, V, Dissertori, G, Drevermann, H, Forty, RW, Frank, M, Hagelberg, R, Hansen, JB, Harvey, J, Janot, P, Jost, B, Lehraus, I, Mato, P, Minten, A, Moneta, L, Pacheco, A, Pusztaszeri, JF, Ranjard, F, Rolandi, L, Rousseau, D, Schlatter, D, Tejessy, W, Teubert, F, Tomalin, IR, Wachsmuth, H, Ajaltouni, Z, Badaud, F, Chazelle, G, Deschamps, O, Falvard, A, Ferdi, C, Gay, P, Guicheney, C, Henrard, P, Jousset, J, Michel, B, Monteil, S, Montret, JC & Pallin, D 1998, 'Observation of doubly-charmed B decays at LEP', European Physical Journal C, vol. 4, no. 3, pp. 387-407.

TY - JOUR

T1 - Observation of doubly-charmed B decays at LEP

AU - Barate, R.

AU - Buskulic, D.

AU - Decamp, D.

AU - Ghez, P.

AU - Goy, C.

AU - Lees, J. P.

AU - Lucotte, A.

AU - Merle, E.

AU - Minard, M. N.

AU - Nief, J. Y.

AU - Pietrzyk, B.

AU - Alemany, R.

AU - Boix, G.

AU - Casado, M. P.

AU - Chmeissani, M.

AU - Crespo, J. M.

AU - Delfino, M.

AU - Fernandez, E.

AU - Fernandez-Bosman, M.

AU - Garrido, L.

AU - Graugès, E.

AU - Juste, A.

AU - Martinez, M.

AU - Merino, G.

AU - Miquel, R.

AU - Mir, L. M.

AU - Park, I. C.

AU - Pascual, A.

AU - Perlas, J. A.

AU - Riu, I.

AU - Sanchez, F.

AU - Colaleo, A.

AU - Creanza, D.

AU - de Palma, M.

AU - Gelao, G.

AU - Iaselli, G.

AU - Maggi, G.

AU - Maggi, M.

AU - Nuzzo, S.

AU - Ranieri, A.

AU - Raso, G.

AU - Ruggieri, F.

AU - Selvaggi, G.

AU - Silvestris, L.

AU - Tempesta, P.

AU - Tricomi, A.

AU - Zito, G.

AU - Huang, X.

AU - Lin, J.

AU - Ouyang, Q.

AU - Wang, T.

AU - Xie, Y.

AU - Xu, R.

AU - Xue, S.

AU - Zhang, J.

AU - Zhang, L.

AU - Zhao, W.

AU - Abbaneo, D.

AU - Becker, U.

AU - Bright-Thomas, P.

AU - Casper, D.

AU - Cattaneo, M.

AU - Ciulli, V.

AU - Dissertori, G.

AU - Drevermann, H.

AU - Forty, R. W.

AU - Frank, M.

AU - Hagelberg, R.

AU - Hansen, J. B.

AU - Harvey, J.

AU - Janot, P.

AU - Jost, B.

AU - Lehraus, I.

AU - Mato, P.

AU - Minten, A.

AU - Moneta, L.

AU - Pacheco, A.

AU - Pusztaszeri, J. F.

AU - Ranjard, F.

AU - Rolandi, L.

AU - Rousseau, D.

AU - Schlatter, D.

AU - Tejessy, W.

AU - Teubert, F.

AU - Tomalin, I. R.

AU - Wachsmuth, H.

AU - Ajaltouni, Z.

AU - Badaud, F.

AU - Chazelle, G.

AU - Deschamps, O.

AU - Falvard, A.

AU - Ferdi, C.

AU - Gay, P.

AU - Guicheney, C.

AU - Henrard, P.

AU - Jousset, J.

AU - Michel, B.

AU - Monteil, S.

AU - Montret, J. C.

AU - Pallin, D.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - 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.

AB - 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.

M3 - Article

VL - 4

SP - 387

EP - 407

IS - 3

ER -

Observation of doubly-charmed B decays at LEP

Abstract

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