Search for the Bc meson in hadronic Z decays

R. Barate; D. Buskulic; D. Decamp; P. Ghez; C. Goy; J. P. Lees; A. Lucotte; M. N. Minard; J. Y. Nief; B. Pietrzyk; M. P. Casado; M. Chmeissani; P. Comas; J. M. Crespo; M. Delfino; E. Fernandez; M. Fernandez-Bosman; L. Garrido; A. Juste; M. Martinez; R. Miquel; L. M. Mir; S. Orteu; C. Padilla; I. C. Park; A. Pascual; J. A. Perlas; I. Riu; F. Sanchez; F. Teubert; A. Colaleo; D. Creanza; M. de Palma; G. Gelao; G. Iaselli; G. Maggi; M. Maggi; N. Marinelli; 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; R. Alemany; U. Becker; A. O. Bazarko; P. Bright-Thomas; M. Cattaneo; F. Cerutti; H. Drevermann; R. W. Forty; M. Frank; R. Hagelberg; J. Harvey; P. Janot; B. Jost; E. Kneringer; J. Knobloch; I. Lehraus; G. Lutters; P. Mato; A. Minten; L. Moneta; A. Pacheco; J. F. Pusztaszeri; F. Ranjard; P. Rensing; G. Rizzo; L. Rolandi; D. Schlatter; M. Schmitt; O. Schneider; W. Tejessy; I. R. Tomalin; H. Wachsmuth; A. Wagner; Z. Ajaltouni; A. Barrès; C. Boyer; A. Falvard; C. Ferdi; P. Gay; C. Guicheney; P. Henrard; J. Jousset

doi:10.1016/S0370-2693(97)00461-9

Search for the B_c meson in hadronic Z decays

R. Barate, D. Buskulic, D. Decamp, P. Ghez, C. Goy, J. P. Lees, A. Lucotte, M. N. Minard, J. Y. Nief, B. Pietrzyk, M. P. Casado, M. Chmeissani, P. Comas, J. M. Crespo, M. Delfino, E. Fernandez, M. Fernandez-Bosman, L. Garrido, A. Juste, M. MartinezR. Miquel, L. M. Mir, S. Orteu, C. Padilla, I. C. Park, A. Pascual, J. A. Perlas, I. Riu, F. Sanchez, F. Teubert, A. Colaleo, D. Creanza, M. de Palma, G. Gelao, G. Iaselli, G. Maggi, M. Maggi, N. Marinelli, 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, R. Alemany, U. Becker, A. O. Bazarko, P. Bright-Thomas, M. Cattaneo, F. Cerutti, H. Drevermann, R. W. Forty, M. Frank, R. Hagelberg, J. Harvey, P. Janot, B. Jost, E. Kneringer, J. Knobloch, I. Lehraus, G. Lutters, P. Mato, A. Minten, L. Moneta, A. Pacheco, J. F. Pusztaszeri, F. Ranjard, P. Rensing, G. Rizzo, L. Rolandi, D. Schlatter, M. Schmitt, O. Schneider, W. Tejessy, I. R. Tomalin, H. Wachsmuth, A. Wagner, Z. Ajaltouni, A. Barrès, C. Boyer, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset

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Abstract

A search for the Bc meson decaying into the channels J/ψπ+ and J/ψℓ+vl (ℓ = e or μ) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. The following 90% confidence level upper limits are derived: Br(Z → BcX)/Br(Z → qq̄) Br(Bc+ → J/ψπ+) < 3.6 × 10-5, Br(Z → BcX)/Br(Z → qq̄) Br(Btc → J/ψℓ+ vℓ) < 5.2 × 10-5. Another B+c → J/ψ(e+e-)μ+ vμ candidate with very low background probability, found in an independent analysis, is also described in detail. © 1997 Published by Elsevier Science B.V.

Original language	English
Pages (from-to)	213-226
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	402
DOIs	https://doi.org/10.1016/S0370-2693(97)00461-9
Publication status	Published - 5 Jun 1997

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10.1016/S0370-2693(97)00461-9

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Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J. P., Lucotte, A., Minard, M. N., Nief, J. Y., Pietrzyk, B., Casado, M. P., Chmeissani, M., Comas, P., Crespo, J. M., Delfino, M., Fernandez, E., Fernandez-Bosman, M., Garrido, L., Juste, A., ... Jousset, J. (1997). Search for the B_c meson in hadronic Z decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 402, 213-226. https://doi.org/10.1016/S0370-2693(97)00461-9

@article{e75e379b148b4527aae48678d43fc951,

title = "Search for the Bc meson in hadronic Z decays",

abstract = "A search for the Bc meson decaying into the channels J/ψπ+ and J/ψℓ+vl (ℓ = e or μ) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. The following 90% confidence level upper limits are derived: Br(Z → BcX)/Br(Z → q{\=q}) Br(Bc+ → J/ψπ+) < 3.6 × 10-5, Br(Z → BcX)/Br(Z → q{\=q}) Br(Btc → J/ψℓ+ vℓ) < 5.2 × 10-5. Another B+c → J/ψ(e+e-)μ+ vμ candidate with very low background probability, found in an independent analysis, is also described in detail. {\textcopyright} 1997 Published by Elsevier Science B.V.",

author = "R. Barate and D. Buskulic and D. Decamp and P. Ghez and C. Goy and Lees, {J. P.} and A. Lucotte and Minard, {M. N.} and Nief, {J. Y.} and B. Pietrzyk and Casado, {M. P.} and M. Chmeissani and P. Comas and Crespo, {J. M.} and M. Delfino and E. Fernandez and M. Fernandez-Bosman and L. Garrido and A. Juste and M. Martinez and R. Miquel and Mir, {L. M.} and S. Orteu and C. Padilla and Park, {I. C.} and A. Pascual and Perlas, {J. A.} and I. Riu and F. Sanchez and F. Teubert and A. Colaleo and D. Creanza and {de Palma}, M. and G. Gelao and G. Iaselli and G. Maggi and M. Maggi and N. Marinelli 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 R. Alemany and U. Becker and Bazarko, {A. O.} and P. Bright-Thomas and M. Cattaneo and F. Cerutti and H. Drevermann and Forty, {R. W.} and M. Frank and R. Hagelberg and J. Harvey and P. Janot and B. Jost and E. Kneringer and J. Knobloch and I. Lehraus and G. Lutters and P. Mato and A. Minten and L. Moneta and A. Pacheco and Pusztaszeri, {J. F.} and F. Ranjard and P. Rensing and G. Rizzo and L. Rolandi and D. Schlatter and M. Schmitt and O. Schneider and W. Tejessy and Tomalin, {I. R.} and H. Wachsmuth and A. Wagner and Z. Ajaltouni and A. Barr{\`e}s and C. Boyer and A. Falvard and C. Ferdi and P. Gay and C. Guicheney and P. Henrard and J. Jousset",

year = "1997",

month = jun,

day = "5",

doi = "10.1016/S0370-2693(97)00461-9",

language = "English",

volume = "402",

pages = "213--226",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}

Barate, R, Buskulic, D, Decamp, D, Ghez, P, Goy, C, Lees, JP, Lucotte, A, Minard, MN, Nief, JY, Pietrzyk, B, Casado, MP, Chmeissani, M, Comas, P, Crespo, JM , Delfino, M , Fernandez, E, Fernandez-Bosman, M, Garrido, L, Juste, A, Martinez, M, Miquel, R, Mir, LM, Orteu, S, Padilla, C, Park, IC, Pascual, A, Perlas, JA, Riu, I, Sanchez, F, Teubert, F, Colaleo, A, Creanza, D, de Palma, M, Gelao, G, Iaselli, G, Maggi, G, Maggi, M, Marinelli, N, 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, Alemany, R, Becker, U, Bazarko, AO, Bright-Thomas, P, Cattaneo, M, Cerutti, F, Drevermann, H, Forty, RW, Frank, M, Hagelberg, R, Harvey, J, Janot, P, Jost, B, Kneringer, E, Knobloch, J, Lehraus, I, Lutters, G, Mato, P, Minten, A, Moneta, L, Pacheco, A, Pusztaszeri, JF, Ranjard, F, Rensing, P, Rizzo, G, Rolandi, L, Schlatter, D, Schmitt, M, Schneider, O, Tejessy, W, Tomalin, IR, Wachsmuth, H, Wagner, A, Ajaltouni, Z, Barrès, A, Boyer, C, Falvard, A, Ferdi, C, Gay, P, Guicheney, C, Henrard, P & Jousset, J 1997, 'Search for the B_c meson in hadronic Z decays', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 402, pp. 213-226. https://doi.org/10.1016/S0370-2693(97)00461-9

TY - JOUR

T1 - Search for the Bc meson in hadronic Z decays

AU - Barate, R.

AU - Buskulic, D.

AU - Decamp, D.

AU - Ghez, P.

AU - Goy, C.

AU - Lees, J. P.

AU - Lucotte, A.

AU - Minard, M. N.

AU - Nief, J. Y.

AU - Pietrzyk, B.

AU - Casado, M. P.

AU - Chmeissani, M.

AU - Comas, P.

AU - Crespo, J. M.

AU - Delfino, M.

AU - Fernandez, E.

AU - Fernandez-Bosman, M.

AU - Garrido, L.

AU - Juste, A.

AU - Martinez, M.

AU - Miquel, R.

AU - Mir, L. M.

AU - Orteu, S.

AU - Padilla, C.

AU - Park, I. C.

AU - Pascual, A.

AU - Perlas, J. A.

AU - Riu, I.

AU - Sanchez, F.

AU - Teubert, F.

AU - Colaleo, A.

AU - Creanza, D.

AU - de Palma, M.

AU - Gelao, G.

AU - Iaselli, G.

AU - Maggi, G.

AU - Maggi, M.

AU - Marinelli, N.

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 - Alemany, R.

AU - Becker, U.

AU - Bazarko, A. O.

AU - Bright-Thomas, P.

AU - Cattaneo, M.

AU - Cerutti, F.

AU - Drevermann, H.

AU - Forty, R. W.

AU - Frank, M.

AU - Hagelberg, R.

AU - Harvey, J.

AU - Janot, P.

AU - Jost, B.

AU - Kneringer, E.

AU - Knobloch, J.

AU - Lehraus, I.

AU - Lutters, G.

AU - Mato, P.

AU - Minten, A.

AU - Moneta, L.

AU - Pacheco, A.

AU - Pusztaszeri, J. F.

AU - Ranjard, F.

AU - Rensing, P.

AU - Rizzo, G.

AU - Rolandi, L.

AU - Schlatter, D.

AU - Schmitt, M.

AU - Schneider, O.

AU - Tejessy, W.

AU - Tomalin, I. R.

AU - Wachsmuth, H.

AU - Wagner, A.

AU - Ajaltouni, Z.

AU - Barrès, A.

AU - Boyer, C.

AU - Falvard, A.

AU - Ferdi, C.

AU - Gay, P.

AU - Guicheney, C.

AU - Henrard, P.

AU - Jousset, J.

PY - 1997/6/5

Y1 - 1997/6/5

N2 - A search for the Bc meson decaying into the channels J/ψπ+ and J/ψℓ+vl (ℓ = e or μ) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. The following 90% confidence level upper limits are derived: Br(Z → BcX)/Br(Z → qq̄) Br(Bc+ → J/ψπ+) < 3.6 × 10-5, Br(Z → BcX)/Br(Z → qq̄) Br(Btc → J/ψℓ+ vℓ) < 5.2 × 10-5. Another B+c → J/ψ(e+e-)μ+ vμ candidate with very low background probability, found in an independent analysis, is also described in detail. © 1997 Published by Elsevier Science B.V.

AB - A search for the Bc meson decaying into the channels J/ψπ+ and J/ψℓ+vl (ℓ = e or μ) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. The following 90% confidence level upper limits are derived: Br(Z → BcX)/Br(Z → qq̄) Br(Bc+ → J/ψπ+) < 3.6 × 10-5, Br(Z → BcX)/Br(Z → qq̄) Br(Btc → J/ψℓ+ vℓ) < 5.2 × 10-5. Another B+c → J/ψ(e+e-)μ+ vμ candidate with very low background probability, found in an independent analysis, is also described in detail. © 1997 Published by Elsevier Science B.V.

U2 - 10.1016/S0370-2693(97)00461-9

DO - 10.1016/S0370-2693(97)00461-9

M3 - Article

SN - 0370-2693

VL - 402

SP - 213

EP - 226

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Search for the Bc meson in hadronic Z decays

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Search for the B_c meson in hadronic Z decays