Precise measurement of [formula omitted] mixing parameters at the ϒ(4 S)

• Published in: Physics letters. B Vol. 490; no. 1; pp. 36 - 44
• Main Authors: Ford, W.T., Gritsan, A., Baker, R., Bebek, C., Berkelman, K., Blanc, F., Cassel, D.G., Dickson, M., Foland, A.D., Gaidarev, P., Gibbons, L., Gray, S.W., Hopman, P.I., Jones, C.D., Lohner, M., Magerkurth, A., Patterson, J.R., Peterson, D., Riley, D., Thayer, J.G., Valant-Spaight, B., Rubiera, A.I., Zheng, J., Brandenburg, G., Yamamoto, H., Bergfeld, T., Gollin, G.D., Hans, R.M., Johnson, E., Marsh, M.A., Palmer, M., Plager, C., Sedlack, C., Thaler, J.J., Williams, J., Janicek, R., Patel, P.M., Bean, A., Davis, R., Lee, S.J., Mahapatra, R., O'Neill, J.J., Riehle, T., Ahmed, S., Alam, M.S., Athar, S.B., Mahmood, A.H., Saleem, M., Timm, S., Anastassov, A., Gan, K.K., Gwon, C., Hart, T., Honscheid, K., Kass, R., Thayer, J.B., Severini, H., Skubic, P., Chen, S., Fast, J., Lee, J., Shipsey, I.P.J., Pavlunin, V., Jessop, C.P., Ugolini, D., Zhou, X., Coan, T.E., Fadeyev, V., Maravin, Y., Narsky, I., Wlodek, T., Artuso, M., Moneti, G.C., Mountain, R., Viehhauser, G., Wang, J.C., Wolf, A., Wu, J., Kopp, S., Danko, I., Márka, Sz, Kinoshita, K., Lai, I.C., Schrenk, S., Bonvicini, G., Cinabro, D., McGee, S., Zhou, G.J., Lipeles, E., Schmidtler, M., Shapiro, A., Sun, W.M., Würthwein, F., Masek, G., Paar, H.P., Prell, S., Gronberg, J., Hill, T.S., Morrison, R.J., Nelson, H.N.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2000
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(00)00990-4

We describe a measurement of B 0− B 0 mixing parameters exploiting a method of partial reconstruction of the decay chains B→D ∗±π ∓ and B→D ∗±ρ ∓ . Using 9.6 ×10 6B B pairs collected at the Cornell Electron Storage Ring, we find χ d =0.198±0.013±0.014, | y d |<0.40 at 95% confidence level, and | R e(ϵ B)|<0.034 at 95% confidence level.