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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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