Measurement of the Cross Section for open b-Quark Production in Two-Photon Interactions at LEP Auteur(s): Schael S., Barate R., Brunelière R., De Bonis I., Decamp D., Goy C., Jézéquel S., Lees J.P., Martin F., Merle E., Minard M.N., Pietrzyk B., Trocmé B., Badaud F., Dessagne S., Falvard Alain, Fayolle D., Gay P., Jousset J., Michel B., Monteil S., Pallin D., Pascolo J.M., Perret P., Blondel A., Brient J.-C., Machefert F., Rougé A., Videau H., Jacholkowska Agnieszka (Article) Publié: Journal Of High Energy Physics, vol. 09 p.102 (2007) Texte intégral en Openaccess : Ref HAL: in2p3-00169489_v1 Ref Arxiv: 0706.3150 DOI: 10.1088/1126-6708/2007/09/102 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 4 citations Résumé: Inclusive beauty-quark production in two-photon collisions has been measured at LEP using an integrated luminosity of 698 pb-1 collected by the ALEPH detector with sqrt(s) between 130 and 209 GeV. The b quarks were identified using lifetime information. The cross section is found to be sigma(e+ e- --> e+ e- b \bar{b} X) = (5.4 +/- 0.8 (stat) +/- 0.8 (syst)) pb which is consistent with Next-to-Leading Order QCD. Commentaires: 15 pages, 8 figures. Submitted to JHEP |