Production of D<inf>s</inf><sup>**</sup> mesons in hadronic Z decays

A. Heister, S. Schael, R. Barate, I. De Bonis, D. Decamp, C. Goy, J. P. Lees, E. Merle, M. N. Minard, B. Pietrzyk, G. Boix, S. Bravo, M. P. Casado, M. Chmeissani, J. M. Crespo, E. Fernandez, M. Fernandez-Bosman, L. Garrido, E. Graugés, M. MartinezG. Merino, R. Miquel, Ll M. Mir, A. Pacheco, H. Ruiz, A. Colaleo, D. Creanza, M. de Palma, 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, P. Azzurri, O. Buchmüller, M. Cattaneo, F. Cerutti, B. Clerbaux, H. Drevermann, R. W. Forty, M. Frank, F. Gianotti, T. C. Greening, J. B. Hansen, J. Harvey, D. E. Hutchcroft, P. Janot, B. Jost, M. Kado, P. Mato, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, O. Schneider, G. Sguazzoni, W. Tejessy, F. Teubert, A. Valassi, I. Videau, J. Ward, F. Badaud, A. Falvard, P. Gay, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. C. Montret, D. Pallin, P. Perret, J. D. Hansen, J. R. Hansen, P. H. Hansen, B. S. Nilsson, A. Wäänänen, A. Kyriakis, C. Markou, E. Simopoulou, A. Vayaki, K. Zachariadou, A. Blondel

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Abstract

The production rates of the orbitally excited Ds** mesons, Ds1± and Ds2*±, are measured with the 4.1 million hadronic Z decays recorded by the ALEPH detector during 1991-1995. The Ds** mesons are reconstructed in the decay modes Ds1+ → D*+K0, Ds1+ → D*0K+ and Ds2*+ → D0K+. The production rate of the Ds1± is measured to be f(Z → Ds1±) = (0.52 ± 0.09 ± 0.06)%, under the assumption that the two considered decay modes of the Ds1± saturate the branching ratio. The production rate of the Ds2*± is determined to be f(Z → Ds2*±) = (0.83 ± 0.29-0.13+0.07)%, assuming that the branching fraction of the decay Ds2*+ → D0K+ is 45%. The production rates in Z → cc̄ and Z → bb̄ decays are measured separately. © 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)34-49
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume526
Issue number1-2
DOIs
Publication statusPublished - 31 Jan 2002

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