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Measurement of the D0 and D+ lifetimes.

  • Author(s): Gladney, L;
  • Jaros, JA;
  • Ong, RA;
  • Barklow, T;
  • Boyarski, AM;
  • Breidenbach, M;
  • Burchat, P;
  • Burke, DL;
  • Dorfan, JM;
  • Feldman, GJ;
  • Hanson, G;
  • Hayes, K;
  • Hollebeek, RJ;
  • Innes, WR;
  • Karlen, D;
  • Lankford, AJ;
  • Larsen, RR;
  • LeClaire, BW;
  • Levi, ME;
  • Lockyer, NS;
  • Lüth, V;
  • Matteuzzi, C;
  • Perl, ML;
  • Richter, B;
  • Riles, K;
  • Ross, MC;
  • Yelton, JM;
  • Zaiser, C;
  • Abrams, GS;
  • Amidei, D;
  • Baden, AR;
  • Boyer, J;
  • Butler, F;
  • Gidal, G;
  • Gold, MK;
  • Goldhaber, G;
  • Golding, L;
  • Haggerty, J;
  • Herrup, D;
  • Juricic, I;
  • Kadyk, JA;
  • Nelson, ME;
  • Rowson, PC;
  • Schellman, H;
  • Schmidke, WB;
  • Sheldon, PD;
  • Trilling, GH;
  • de la Vaissiere C;
  • Wood, DR;
  • Schaad, T
  • et al.
Abstract

We have used a high-resolution drift chamber in the Mark II detector at the SLAC e+e- storage ring PEP to measure the lifetimes of the D0 and D+ mesons produced in e+e- annihilations at 29 GeV. Based on a sample of 74 decays for the D0 mesons and 23 decays for the D+ mesons, the lifetimes are found to be &=(4.7-0.8+0.9) 0.5×10-13 sec and &=(8.9-2.7+3.8) 1.3×10-13 sec. This leads to a ratio of lifetimes &=1.9-0.7 0.3+0.9.. AE © 1986 The American Physical Society.

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