15 research outputs found
A Measurement of Psi(2S) Resonance Parameters
Cross sections for e+e- to hadons, pi+pi- J/Psi, and mu+mu- have been
measured in the vicinity of the Psi(2S) resonance using the BESII detector
operated at the BEPC. The Psi(2S) total width; partial widths to hadrons,
pi+pi- J/Psi, muons; and corresponding branching fractions have been determined
to be Gamma(total)= (264+-27) keV; Gamma(hadron)= (258+-26) keV, Gamma(mu)=
(2.44+-0.21) keV, and Gamma(pi+pi- J/Psi)= (85+-8.7) keV; and Br(hadron)=
(97.79+-0.15)%, Br(pi+pi- J/Psi)= (32+-1.4)%, Br(mu)= (0.93+-0.08)%,
respectively.Comment: 8 pages, 6 figure
A late quaternary pollen sequence from blacktail pond, Yellowstone national park, Wyoming, U.S.A.
Improvement of a testing apparatus for dynamometry: procedures for penetrometry and influence of strain rate to quantify the tensile strength of soil aggregates
Demineralized bone matrix, bone morphogenetic proteins, and animal models of spine fusion: an overview
Recommended from our members
A measurement of ψ(2S) resonance parameters
Cross sections for e+e−→ hadrons, π+π−J/ψ, and μ+μ− have been measured in the vicinity of the ψ(2S) resonance using the BESII detector operated at the BEPC. The ψ(2S) total width; partial widths to hadrons, π+π−J/ψ, leptons; and corresponding branching fractions have been determined to be Γt=264±27 keV; Γh=258±26 keV, Γπ+π−J/ψ=85.4±8.7 keV, and Γl=2.44±0.21 keV; and Bh=(97.79±0.15)%, Bπ+π−J/ψ=(32.3±1.4)% , and Bl=(0.93±0.08)%, respectively