Jacobsen, RG; Koetke, DS; Adolphsen, CE; Fujino, D; Schumm, BA; Wagner, SR; Alexander, JP; Averill, D; Barish, BC; Barklow, T; Barnett, BA; Blockus, D; Boyarski, A; Brabson, B; Breakstone, A; Bulos, F; Burchat, PR; Burke, DL; Cence, RJ; Chapman, J; Chmeissani, M; Cords, D; Coupal, DP; Dauncey, P; DeStaebler, HC; Dorfan, JM; Drell, PS; Drewer, DC; Durrett, D; Elia, R; Feldman, GJ; Field, RC; Ford, WT; Fordham, C; Frey, R; Gan, KK; Gero, E; Gidal, G; Glanzman, T; Goldhaber, G; Cadenas, JJ Gomez; Gratta, G; Hanson, G; Harr, R; Harral, B; Harris, FA; Hayes, K; Hearty, C; Heusch, CA; Hildreth, MD; Himel, T; Hinshaw, DA; Hong, SJ; Hutchinson, D; Hylen, J; Innes, WR; Jaros, JA; Jung, CK; Kadyk, JA; Kenney, C; King, M; Komamiya, S; Kowalski, LA; Kral, JF; Kuhlen, M; Labarga, L; Lankford, AJ; Le Diberder, F; Levi, ME; Litke, AM; Lou, XC; Lüth, V; McKenna, JA; Matthews, JAJ; Mattison, T; Moffeit, KC; Munger, CT; Murray, WN; Nash, J; Ogren, H; O’Shaughnessy, KF; Parker, SI; Peck, C; Perl, ML; Petradza, M

doi:10.1103/physrevlett.67.3347

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

1991

Jacobsen, RG;
Koetke, DS;
Adolphsen, CE;
Fujino, D;
Schumm, BA;
Wagner, SR;
Alexander, JP;
Averill, D;
Barish, BC;
Barklow, T;
Barnett, BA;
Blockus, D;
Boyarski, A;
Brabson, B;
Breakstone, A;
Bulos, F;
Burchat, PR;
Burke, DL;
Cence, RJ;
Chapman, J;
Chmeissani, M;
Cords, D;
Coupal, DP;
Dauncey, P;
DeStaebler, HC;
Dorfan, JM;
Drell, PS;
Drewer, DC;
Durrett, D;
Elia, R;
Feldman, GJ;
Field, RC;
Ford, WT;
Fordham, C;
Frey, R;
Gan, KK;
Gero, E;
Gidal, G;
Glanzman, T;
Goldhaber, G;
Cadenas, JJ Gomez;
Gratta, G;
Hanson, G;
Harr, R;
Harral, B;
Harris, FA;
Hayes, K;
Hearty, C;
Heusch, CA;
Hildreth, MD;
Himel, T;
Hinshaw, DA;
Hong, SJ;
Hutchinson, D;
Hylen, J;
Innes, WR;
Jaros, JA;
Jung, CK;
Kadyk, JA;
Kenney, C;
King, M;
Komamiya, S;
Kowalski, LA;
Kral, JF;
Kuhlen, M;
Labarga, L;
Lankford, AJ;
Le Diberder, F;
Levi, ME;
Litke, AM;
Lou, XC;
Lüth, V;
McKenna, JA;
Matthews, JAJ;
Mattison, T;
Moffeit, KC;
Munger, CT;
Murray, WN;
Nash, J;
Ogren, H;
O’Shaughnessy, KF;
Parker, SI;
Peck, C;
Perl, ML;
Petradza, M;
Pitthan, R;
Porter, FC;
Rankin, P;
Rust, DR;
Sadrozinski, HFW;
Schwarz, AS;
Seiden, A;
Smith, JG;
Snyder, A;
Soderstrom, E;
Stoker, DP;
Stroynowski, R;
Swartz, M;
Thun, R;
Trilling, GH;
Turala, M;
Van Kooten, R;
Weber, P;
Weinstein, AJ;
Wicklund, E;
Woods, M;
Yurko, M;
Zaccardelli, C

et al.

Published Web Location

https://doi.org/10.1103/physrevlett.67.3347

Creative Commons 'BY' version 4.0 license

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.

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

Published Web Location