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Title: Measurement of the lifetimes of the charmed D/sup +/, F/sup +/ mesons and. lambda. /sub c//sup +/ charmed baryon

Abstract

An experiment was performed in the 350 GeV wide-band neutrino beam at the Fermi National Accelerator Laboratory using a high-precision, high-efficiency hybrid emulsion/neutrino spectrometer, with which the mean lifetimes of the D/sup +/, D/sup 0/, and F/sup +/ mesons and ..lambda../sub c//sup +/ baryon were measured. 1829 neutrino interactions were reconstructed with a vertex within the emulsion fiducial volume, 1242 of which were subsequently found in the emulsion. In 49 of the found neutrino events a charmed particle, produced at the primary vertex, was observed to decay within the emulsion volume. The mean lifetimes of charmed particles were determined from the reconstructed decays of 5 D/sup +/, 15 D/sup 0/, 3 F/sup +/ mesons: and 8 ..lambda../sub c//sup +/ baryons: tau/sub D/sup +// = 10.3/sub -4.2//sup +10.3/ x 10/sup -13/ sec; tau/sub D/sup 0// = 2.3/sub -0.5//sup +0.8/ x 10/sup -13/ sec; tau/sub f/sup +// = 2.0/sub -0.8//sup +1.8/ x 10/sup -13/ sec; and tau/sub ..lambda..//sub c//sup +/ = 2.3/sub -0.6//sup +1.0/ x 10/sup -13/ sec. The charmed particle masses measured in this experiment were: M/sub D/sup +// = 1851 +- 20 MeV/c/sup 2/; M/sub D/sup 0// = 1856 +- 15 MeV/c/sup 2/; M/sub F/sup +// = 2042 +- 33more » MeV/c/sup 2/; M/sub ..lambda..//sub c//sup +/ = 2265 +- 30 MeV/c/sub 2/.« less

Authors:
 [1]
  1. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
6264960
Report Number(s):
FERMILAB-THESIS-1981-05
TRN: 83-012748
Resource Type:
Thesis/Dissertation
Resource Relation:
Related Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHARMED BARYON RESONANCES; MASS; WEAK PARTICLE DECAY; D-1865 RESONANCES; F-2030 RESONANCES; LAMBDA-2250 RESONANCES; EXPERIMENTAL DATA; FERMILAB ACCELERATOR; GEV RANGE 100-1000; LIFETIME; NEUTRINO REACTIONS; ACCELERATORS; BARYON RESONANCES; BARYONS; BOSONS; CHARM PARTICLES; CHARMED MESON RESONANCES; CYCLIC ACCELERATORS; D RESONANCES; DATA; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; INFORMATION; LEPTON REACTIONS; MESON RESONANCES; MESONS; NUCLEAR REACTIONS; NUMERICAL DATA; PARTICLE DECAY; POSTULATED PARTICLES; RESONANCE PARTICLES; SYNCHROTRONS; 645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties

Citation Formats

Errede, Steven Michael. Measurement of the lifetimes of the charmed D/sup +/, F/sup +/ mesons and. lambda. /sub c//sup +/ charmed baryon. United States: N. p., 1981. Web. doi:10.2172/6264960.
Errede, Steven Michael. Measurement of the lifetimes of the charmed D/sup +/, F/sup +/ mesons and. lambda. /sub c//sup +/ charmed baryon. United States. https://doi.org/10.2172/6264960
Errede, Steven Michael. Thu . "Measurement of the lifetimes of the charmed D/sup +/, F/sup +/ mesons and. lambda. /sub c//sup +/ charmed baryon". United States. https://doi.org/10.2172/6264960. https://www.osti.gov/servlets/purl/6264960.
@article{osti_6264960,
title = {Measurement of the lifetimes of the charmed D/sup +/, F/sup +/ mesons and. lambda. /sub c//sup +/ charmed baryon},
author = {Errede, Steven Michael},
abstractNote = {An experiment was performed in the 350 GeV wide-band neutrino beam at the Fermi National Accelerator Laboratory using a high-precision, high-efficiency hybrid emulsion/neutrino spectrometer, with which the mean lifetimes of the D/sup +/, D/sup 0/, and F/sup +/ mesons and ..lambda../sub c//sup +/ baryon were measured. 1829 neutrino interactions were reconstructed with a vertex within the emulsion fiducial volume, 1242 of which were subsequently found in the emulsion. In 49 of the found neutrino events a charmed particle, produced at the primary vertex, was observed to decay within the emulsion volume. The mean lifetimes of charmed particles were determined from the reconstructed decays of 5 D/sup +/, 15 D/sup 0/, 3 F/sup +/ mesons: and 8 ..lambda../sub c//sup +/ baryons: tau/sub D/sup +// = 10.3/sub -4.2//sup +10.3/ x 10/sup -13/ sec; tau/sub D/sup 0// = 2.3/sub -0.5//sup +0.8/ x 10/sup -13/ sec; tau/sub f/sup +// = 2.0/sub -0.8//sup +1.8/ x 10/sup -13/ sec; and tau/sub ..lambda..//sub c//sup +/ = 2.3/sub -0.6//sup +1.0/ x 10/sup -13/ sec. The charmed particle masses measured in this experiment were: M/sub D/sup +// = 1851 +- 20 MeV/c/sup 2/; M/sub D/sup 0// = 1856 +- 15 MeV/c/sup 2/; M/sub F/sup +// = 2042 +- 33 MeV/c/sup 2/; M/sub ..lambda..//sub c//sup +/ = 2265 +- 30 MeV/c/sub 2/.},
doi = {10.2172/6264960},
url = {https://www.osti.gov/biblio/6264960}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

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