skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Charm Baryon Studies at BaBar

Abstract

The authors present a precision measurement of the mass of the {Lambda}{sub c}{sup +} and studies of the production and decay of the {Omega}{sub c}{sup 0} and {Xi}{sub c}{sup 0} charm baryons using data collected by the BABAR experiment. To keep the systematic uncertainty as low as possible, the {Lambda}{sub c}{sup +} mass measurement is performed using the low Q-value decays, {Lambda}{sub c}{sup +} {yields} {Lambda}{sup 0} K{sub S}{sup 0}K{sup +} and {Lambda}{sub c}{sup +} {yields} {Sigma}{sup 0} K{sub S}{sup 0}K{sup +}. Several hadronic final states involving an {Omega}{sup -} and a {Xi}{sup -} hyperon are analyzed to reconstruct the {Xi}{sub c}{sup 0} and the {Omega}{sub c}{sup 0}.

Authors:
;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
881545
Report Number(s):
SLAC-PUB-11837
TRN: US0603000
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Prepared for 11th International Conference on Hadron Spectroscopy (Hadron05), Rio de Janeiro, Brazil, 21-26 Aug 2005
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; BARYONS; DECAY; HADRONS; HYPERONS; PRODUCTION; Q-VALUE; SPECTROSCOPY; Experiment-HEP,HEPEX

Citation Formats

Ziegler, V., and /Iowa U.. Charm Baryon Studies at BaBar. United States: N. p., 2006. Web.
Ziegler, V., & /Iowa U.. Charm Baryon Studies at BaBar. United States.
Ziegler, V., and /Iowa U.. Fri . "Charm Baryon Studies at BaBar". United States. doi:. https://www.osti.gov/servlets/purl/881545.
@article{osti_881545,
title = {Charm Baryon Studies at BaBar},
author = {Ziegler, V. and /Iowa U.},
abstractNote = {The authors present a precision measurement of the mass of the {Lambda}{sub c}{sup +} and studies of the production and decay of the {Omega}{sub c}{sup 0} and {Xi}{sub c}{sup 0} charm baryons using data collected by the BABAR experiment. To keep the systematic uncertainty as low as possible, the {Lambda}{sub c}{sup +} mass measurement is performed using the low Q-value decays, {Lambda}{sub c}{sup +} {yields} {Lambda}{sup 0} K{sub S}{sup 0}K{sup +} and {Lambda}{sub c}{sup +} {yields} {Sigma}{sup 0} K{sub S}{sup 0}K{sup +}. Several hadronic final states involving an {Omega}{sup -} and a {Xi}{sup -} hyperon are analyzed to reconstruct the {Xi}{sub c}{sup 0} and the {Omega}{sub c}{sup 0}.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Apr 21 00:00:00 EDT 2006},
month = {Fri Apr 21 00:00:00 EDT 2006}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • We present experimental results from the BaBar experiment on charm baryon spectroscopy and production studies, including studies of excited cascades produced in charm baryon decays. We review the discovery of new decay modes of known states and searches for predicted states.
  • We present a precision measurement of the mass of the {lambda}{sub c}{sup +} and studies of the production and decay of the {omega}{sub c}{sup 0} and {xi}{sub c}{sup 0} charm baryons using data collected by the BABAR experiment. To keep the systematic uncertainty as low as possible, the {lambda}{sub c}{sup +} mass measurement is performed using the low Q-value decays, {lambda}{sub c}{sup +} {yields} {lambda}{sup 0}K{sub S}{sup 0}K{sup +} and {lambda}{sub c}{sup +} {yields} {sigma}{sup 0}K{sub S}{sup 0}K{sup +}. Several hadronic final states involving an {omega}- and a {xi}- hyperon are analyzed to reconstruct the {xi}{sub c}{sup 0} and themore » {omega}{sub c}{sup 0}.« less
  • We have carried out a search for a charmed baryon Ωmore » $$*\atop{c}$$ decaying to Ω$$0\atop{c}$$ and a γ where Ω c candidates are reconstructed using decay modes Ω -π +(c1), Ω -π +π 0(c2), Ω -π +π -π +(c3) and Ξ -K -π +π +(c4). This search is performed by analyzing integrated luminosity of 230.7 fb -1 data collected by the BABAR detector at the Stanford Linear Accelerator Center. In decay channel Ω$$*\atop{c}$$ → Ω$$0\atop{c}$$(Ω -π +)γ (C1), we observe a signal yield of 39.2$$+9.8\atop{-9.1}$$ (stat)±6.0(syst) events with a significance of 4.2 standard deviations. In decay channels Ω$$*\atop{c}$$ → Ω$$0\atop{c}$$(Ω -π +π 0)γ (C2) and Ω$$*\atop{c}$$ →} Ω$$0\atop{c}$$(Ξ -K -π +π +)γ (C4), we observe signal yields of 55.2$$+16.1\atop{-15.2}$$ ± 5.6 and 20.2$$+9.3\atop{-8.5}$$ ± 3.1 with significances of 3.4 and 2.0 σ, respectively. As for the Ω$$*\atop{c}$$ → Ω$$0\atop{c}$$(Ω -π +π -π +)γ (C3) decay channel, we observe signal yields of -5.1$$+5.3.8\atop{-4.7}$$±1.0 without a positive significance. We assume the same production mechanism for the four decay channels of Ω$$*\atop{c}$$ studied. By combining these four channels, the fit results in a signal yield of 105.3$$+21.2\atop{-20.5}$$± 6.0 events with a significance of 5.2 σ. We report the mass difference Ω$$*\atop{c}$$ - Ω$$0\atop{c}$$(δm) of the singly charmed baryon Ω$$*\atop{c}$$ to be 70.8$$+1.0\atop{-1.0}$$±1.1 MeV. Finally, the ratios of production cross sections are calculated: σ(e +e -→C1)/σ(e +e -→c1) = 0.71$$+0.19\atop{-0.18}$$±0.11, σ(e +e -→C2)/σ(e +e -→c2) = 1.76$$+0.71\atop{-0.69}$$±0.19, σ(e +e -→C3)/σ(e +e -→c3) = -0.66$$+0.74\atop{-0.66}$$±0.13, σ(e +e -→C4)/σ(e +e -→c4) = 1.70{sup +1.0}{sub -1.0}±0.27 and σ(e +e -→Ω$$*\atop{c}$$ (combined))/σ(e +e -→Ω$$0\atop{c}$$) = 1.0$$+0.23\atop{-0.22}$$±0.11.« less
  • This document presents the recent studies of Charmed hadrons at BABAR BELLE and CLEO. Here the author focuses on the recent developments on the study of D*{sub sJ}, observation of D{sup +} {yields} K{sup +} {pi}{sup 0}, D{sup 0} - {bar D}{sup 0} mixing in the doubly cabibbo-suppressed decays using D{sup 0} {yields} K{sup +}{pi}{sup +}{pi}{sup 0} and the measurement of the decay constants using the leptonic D decays.