@article{036d22ea63dd4675b8b0911616913b80,
title = "Lifetime, cross sections, and production mechanisms of charmed particles produced by 20-GeV photons",
abstract = "Seventy-one events containing charmed-particle decays have been observed in an experiment using the SLAC Hybrid Facility exposed to a backward-scattered photon beam. Several improvements were made to the apparatus since the previous experiment on charm photoproduction. Results for the charmed-meson lifetimes are consistent with the published results from the previous experiment and the two data samples have been combined yielding a total sample of 136 charm events. After imposing rigorous cuts, 50 neutral, 48 charged, and 2 charged/neutral ambiguous decays remain. From these, the charmed-meson lifetimes are measured to be \&=(8.61.3-0.3+0. 7)×10-13 sec, \&=(6.10.90.3)×10 -13 sec, and their ratio \&=1.40.3- 0.1+0.2. The total charm cross section at a photon energy of 20 GeV has been measured to be (628-10+15) nb. There is evidence for both DDX and Dc+X production with Dc+X/charm=(71 116)\%.",
author = "\{SLAC Hybrid Facility Photon Collaboration\} and K. Abe and R. Armenteros and Bacon, \{T. C.\} and J. Ballam and Bingham, \{H. H.\} and Brau, \{J. E.\} and K. Braune and D. Brick and Bugg, \{W. M.\} and Butler, \{J. M.\} and W. Cameron and Cohn, \{H. O.\} and Colley, \{D. C.\} and Condo, \{G. T.\} and P. Dingus and R. Erickson and Field, \{R. C.\} and B. Franek and R. Gearhart and T. Glanzman and Godfrey, \{I. M.\} and Goldberg, \{J. J.\} and G. Hall and Hancock, \{E. R.\} and Hargis, \{H. J.\} and Hart, \{E. L.\} and Harwin, \{M. J.\} and K. Hasegawa and M. Jobes and T. Kafka and Kalmus, \{G. E.\} and Kelsey, \{D. P.\} and T. Kitagaki and Mann, \{W. A.\} and R. Merenyi and R. Milburn and Moffeit, \{K. C.\} and Murray, \{J. J.\} and A. Napier and O'Dell, \{V. R.\} and P. Rankin and H. Sagawa and J. Schneps and Sewell, \{S. J.\} and J. Shank and Shapiro, \{A. M.\} and J. Shimony and K. Tamai and S. Tanaka and Waide, \{D. A.\} and M. Widgoff and S. Wolbers and Woods, \{C. A.\} and A. Yamaguchi and Yost, \{G. P.\} and H. Yuta",
note = "Publisher Copyright: {\textcopyright} 1986 The American Physical Society.",
year = "1986",
doi = "10.1103/PhysRevD.33.1",
language = "English",
volume = "33",
pages = "1--18",
journal = "Physical Review D",
issn = "0556-2821",
number = "1",
}