Measurement of the bb» fraction in hadronic Z0 decays with precision vertex detectors

R. G. Jacobsen, D. S. Koetke, C. E. Adolphsen, D. Fujino, B. A. Schumm, S. R. Wagner, J. P. Alexander, D. Averill, B. C. Barish, T. Barklow, B. A. Barnett, D. Blockus, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. ChapmanM. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. Destaebler, J. M. Dorfan, P. S. Drell, D. C. Drewer, D. Durrett, R. Elia, G. J. Feldman, R. C. Field, W. T. Ford, C. Fordham, R. Frey, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Hanson, R. Harr, B. Harral, F. A. Harris, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, J. A. Jaros, C. K. Jung, J. A. Kadyk, C. Kenney, M. King, Sachio Komamiya, L. A. Kowalski, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. L̈th, J. A. McKenna, J. A.J. Matthews, T. Mattison, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. Oeshaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, D. R. Rust, H. F.W. Sadrozinski, A. S. Schwarz, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, M. Turala, R. Van Kooten, P. Weber, A. J. Weinstein, E. Wicklund, M. Woods, M. Yurko, C. Zaccardelli

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Abstract

We have measured the fraction of bb» events in hadronic Z0 decays, Rbb», using the vertex detector system of the Mark II detector at the SLAC Linear Collider. We tag bb» events by requiring the coincidence of three or more tracks with significant impact parameters. This tag is 50% efficient and results in a sample of 85% purity. We find Rbb»=0.251+0.049+0.030, in good agreement with other measurements and the standard model prediction.

Original languageEnglish
Pages (from-to)3347-3350
Number of pages4
JournalPhysical Review Letters
Volume67
Issue number24
DOIs
Publication statusPublished - 1991 Jan 1
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Jacobsen, R. G., Koetke, D. S., Adolphsen, C. E., Fujino, D., Schumm, B. A., Wagner, S. R., Alexander, J. P., Averill, D., Barish, B. C., Barklow, T., Barnett, B. A., Blockus, D., Boyarski, A., Brabson, B., Breakstone, A., Bulos, F., Burchat, P. R., Burke, D. L., Cence, R. J., ... Zaccardelli, C. (1991). Measurement of the bb» fraction in hadronic Z0 decays with precision vertex detectors. Physical Review Letters, 67(24), 3347-3350. https://doi.org/10.1103/PhysRevLett.67.3347