Study of charm production in Z decays.



CERN-LEP. Measurement of the production of charmed D and D* mesons using the full data sample of LEPI data collected between 1991 and 1995. The fractional energy spectrum of D*+- mesons is presented and the probability of a c-quark to hadronize into a D*+- is found to be 0.233 +- 0.010 +- 0.011. Using the D*+- energy and the hemisphere mass imbalance distributions the fraction of Z0 decays inwhich a gluon splits into a ccbar pair is found to be (3.23 +- 0.48 +- 0.53) PC T. The ratio ofVector/(Vector+Pseudoscalar) production rates is found to be 0.595 +- 0.045. The average fraction of the beam energy carried by the D*+- in Z --> CCBAR events isfound to be 0.4878 +- 0.0046 +- 0.0061.
Date made available25 Aug 2015
  • Study of charm production in Z decays

    Barate, R., Decamp, D., Ghez, P., Goy, C., Lees, J. P., Merle, E., Minard, M. N., Pietrzyk, B., Alemany, R., Casado, M. P., Chmeissani, M., Crespo, J. M., Fernandez, E., Fernandez-Bosman, M., Garrido, L., Graugès, E., Juste, A., Martinez, M., Merino, G., Miquel, R., & 80 othersMir, L. M., Pacheco, A., Park, I. C., Riu, I., Colaleo, A., Creanza, D., de Palma, M., 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., Boix, G., Cattaneo, M., Cerutti, F., Ciulli, V., Dissertori, G., Drevermann, H., Forty, R. W., Frank, M., Greening, T. C., Halley, A. W., Hansen, J. B., Harvey, J., Janot, P., Jost, B., Lehraus, I., Leroy, O., Mato, P., Minten, A., Moutoussi, A., Ranjard, F., Rolandi, L., Schlatter, D., Schmitt, M., Schneider, O., Spagnolo, P., Tejessy, W., Teubert, F., Tomalin, I. R., Tournefier, E., Wright, A. E., 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, J. C., Pallin, D., Perret, P., Podlyski, F., Hansen, J. D., Hansen, J. R. & Hansen, P. H., 1 Jan 2000, In: European Physical Journal C. 16, 4, p. 597-611

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