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Direct search for pair production of heavy stable charged particles in Z decays.

  • Author(s): Soderstrom, E;
  • McKenna, JA;
  • Abrams, GS;
  • Adolphsen, CE;
  • Averill, D;
  • Ballam, J;
  • Barish, BC;
  • Barklow, T;
  • Barnett, BA;
  • Bartelt, J;
  • Bethke, S;
  • Blockus, D;
  • Bonvicini, G;
  • 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, DE;
  • Dorfan, JM;
  • Drewer, DC;
  • Elia, R;
  • Feldman, GJ;
  • Fernandes, D;
  • Field, RC;
  • Ford, WT;
  • Fordham, C;
  • Frey, R;
  • Fujino, D;
  • Gan, KK;
  • Gero, E;
  • Gidal, G;
  • Glanzman, T;
  • Goldhaber, G;
  • Gomez Cadenas JJ;
  • Gratta, G;
  • Grindhammer, G;
  • Grosse-Wiesmann, P;
  • Hanson, G;
  • Harr, R;
  • Harral, B;
  • Harris, FA;
  • Hawkes, CM;
  • Hayes, K;
  • Hearty, C;
  • Heusch, CA;
  • Hildreth, MD;
  • Himel, T;
  • Hinshaw, DA;
  • Hong, SJ;
  • Hutchinson, D;
  • Hylen, J;
  • Innes, WR;
  • Jacobsen, RG;
  • Jaros, JA;
  • Jung, CK
  • et al.

A search for pair production of stable charged particles from Z decay has been performed with the Mark II detector at the SLAC Linear Collider. Particle masses are determined from momentum, ionization energy loss, and time-of-flight measurements. A limit excluding pair production of stable fourth-generation charged leptons and stable mirror fermions with masses between the muon mass and 36.3 GeV/c2 is set at the 95% confidence level. Pair production of stable supersymmetric scalar leptons with masses between the muon mass and 32.6 GeV/c2 is also excluded. © 1990 The American Physical Society.

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