A Measurement of Psi(2S) Resonance Parameters

Abstract

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.

8 pages, 6 figures

References in corpus (4)

• Measurements of the Cross Section for e+e- -> hadrons at Center-of-Mass Energies from 2 to 5 GeV
• Measurement of CP-violating asymmetries in B0 decays to CP eigenstates
• First Measurement of the Branching Fraction of the Decay psi(2S) --> tau tau
• Measurement of the branching fractions for psi(2S)-->e+e- and psi(2S)-->mu+mu-

Cited by in corpus (25)

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• A theoretical review of heavy quarkonium inclusive decays
• Measuring psi(3770) --> rho pi in e+e- experiment
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• Measurement of main parameters of the ψ(2S) resonance
• Determination of the relative phase in ψ' and J/ψ decays into baryon and antibaryon
• Precision Measurements of $\mathcal{B}[\psi (3686)\to {\pi }^{+}{\pi }^{-}J/\psi ]$ and $\mathcal{B}[J/\psi \to l^{+}{l}^{-}]$
• Precise measurement of spin-averaged chi_{cJ}(1P) mass using photon conversions in psi(2S) -> gamma chi_{cJ}
• The Form Factors of omega pi0 and pi+ pi- at psi(2S)
• Precision measurements of the total and partial widths of the psi(2S) charmonium meson with a new complementary-scan technique in antiproton-proton annihilations
• First Evidence of Lambda Lambda-bar in χ_cJ Decays
• Search for K_S K_S in J/psi and psi(2S) decays
• Symmetry analysis of charmonium two-body decay
• Improved measurement of $\psi (2S)$ decays into ${\tau }^{+}{\tau }^{-}$
• Determination of BR(chi_{cJ} --> p \bar{p}) in psi(2S) decays
• Measurement of the branching ratios ${\psi }^{\prime }\to e^{+}{e}^{-}$, ${\psi }^{\prime }\to J/\psi \pi \pi$ and ${\psi }^{\prime }\to J/\psi \eta$
• Quark-hadron-duality in the charmonium and upsilon system
• Data taking strategy for the phase study in ${\psi }^{\prime }\to K^{+}{K}^{-}$
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• Model Independent Results for Heavy Quarkonium
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• Charmonium Review