@article{18d1a48b12e1458b9f411ade99b58722,
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.}",
note = "Publisher Copyright: {\textcopyright} 1986 The American Physical Society.",
year = "1986",
doi = "10.1103/PhysRevD.33.1",
language = "English (US)",
volume = "33",
pages = "1--18",
journal = "Physical Review D",
issn = "0556-2821",
publisher = "American Institute of Physics Publising LLC",
number = "1",
}