Combining heavy flavour electroweak measurements at LEP

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 378; no. 1; pp. 101 - 115
• Main Authors: Buskulic, D., de Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.P., Minard, M.N., Pietrzyk, B., Ariztizabal, F., Comas, P., Crespo, J.M., Delfino, M., Efthymiopoulos, I., Fernandez, E., Fernandez-Bosman, M., Gaitan, V., Garrido, L., Mattison, T., Pacheco, A., Padilla, C., Pascual, A., Creanza, D., de Palma, M., Farilla, A., Iaselli, G., Maggi, G., Natali, S., Nuzzo, S., Quattromini, M., Ranieri, A., Raso, G., Romano, F., Ruggieri, F., Selvaggi, G., Silvestris, L., Tempesta, P., Zito, G., Chai, Y., Hu, H., Huang, D., Huang, X., Lin, Jiali, Wang, T., Xie, Y., Xu, D., Xu, R., Zhang, J., Zhang, L., Zhao, W., Blucher, E., Bonvicini, G., Boudreau, J., Casper, D., Drevermann, H., Forty, R.W., Ganis, G., Gay, C., Hagelberg, R., Harvey, J., Hilgart, J., Jacobsen, R., Jost, B., Knobloch, J., Lehraus, I., Lohse, T., Maggi, M., Markou, C., Martinez, M., Mato, P., Meinhard, H., Minten, A., Miotto, A., Miquel, R., Moser, H.G., Palazzi, P., Pater, J.R., Perlas, J.A., Pusztaszeri, J.F., Ranjard, F., Redlinger, G., Rolandi, L., Rothberg, J., Ruan, T., Saich, M., Schlatter, D., Schmelling, M., Sefkow, F., Tejessy, W., Tomalin, I.R., Veenhof, R., Wachsmuth, H., Wasserbaech, S., Wiedenmann, W., Wildish, T., Witzeling, W., Wotschack, J., Ajaltouni, Ziad Zj, Badaud, F., Bardadin-Otwinowska, M., El Fellous, R.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 11.08.1996; Elsevier
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/0168-9002(96)00420-2

The ratios of cross sections, R b = σ( e +e − → b b ) σ( e +e − → hadrons ) and R c = σ( e +e − → c c ) σ( e +e − → hadrons ) , and the forward-backward asymmetries A FB b b and A FB c c , have been measured by the four LEP experiments at centre-of-mass energies close to the Z boson mass, using a variety of heavy flavour identification techniques and analysis methods. The procedure adopted to combine these measurements is described here. It takes into account the statistical and systematic correlations among the measurements and their interdependences in a χ 2 minimization. The procedure is illustrated using published measurements.