Published December 1990 | Version v1
Report Open

Fermilab experiment E-687: Recent results on charm

Creators

  • 1. Notre Dame Univ., IN (USA)

Description

About 104 charm decays have been reconstructed from first-run data of Fermilab experiment E687 using the Fermilab Wide-Band Photon Spectrometer with the world's highest energy photon beam. Charm selection strategies and preliminary results are discussed. Lifetime values are (.50 ± .06 ± .03)ps for the Ds+ and (.20 ± .03 ± .03)ps for the Λc+. Preliminary D+ and D0 lifetimes are consistent with current world averages. Signals for charm baryon and Cabibbo-suppressed charm meson decays are shown. Preliminary branching ratios are: B(D0 → π+π-π+π-)/B(D0 → K-π+π+π-) = .10 ± .02 ± .02; B(D0 → bar K0K+K-)/B(D0 → bar K0π+π-) = .20 ± .06(stat); B(D0 → bar K0φ)/B(D0 → bar K0π+π-) = .16 ± .06(stat). Preliminary results are given on D*± and D±,0 photoproduction for photon energies from 100 to 350 GeV. 13 refs., 3 figs

Availability note (English)

MF available from INIS under the Report Number; OSTI as DE91007060; NTIS; INIS; US Govt. Printing Office Dep.

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Additional details

Publishing Information

Imprint Pagination
8 p.
Report number
FNAL/C--90/260-E

Conference

Title
20. international symposium on multiparticle dynamics.
Dates
10-14 Sep 1990.
Place
Gut Holmecke (Germany, F.R.).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
22036404
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BRANCHING RATIO; CROSS SECTIONS; D MESONS; LAMBDA C PLUS BARYONS; LIFETIME; MASS SPECTRA; PARTICLE DECAY; PARTICLE PRODUCTION; PHOTOPRODUCTION
Descriptors DEC
BARYONS; BASIC INTERACTIONS; BOSONS; CHARM PARTICLES; CHARMED BARYONS; CHARMED MESONS; DECAY; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INTERACTIONS; MESONS; PARTICLE INTERACTIONS; PSEUDOSCALAR MESONS; SPECTRA

Optional Information

Contract/Grant/Project number
Contract AC02-76CH03000
Collaborations
The E-687 Collaboration.
Secondary number(s)
CONF-9009315--5.