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36 papers
The silicon matrix for the prototype for the Dark Matter Particle Explorer
R. R. Fan, F. Zhang, W. X. Peng +11
A new generation detector for the high energy cosmic ray - the DAMPE(DArk Matter Particle Explorer) is a satellite based project. Its main object is the measurement of energy spect…
Design and Construction of the BESIII Detector
The BESIII Collaboration
This paper will discuss the design and construction of BESIII, which is designed to study physics in the tau-charm energy region utilizing the new high luminosity BEPCII double rin…
Measurement of χ_cJ--> K+K-K+K-
BES Collaboration, M. AblikimJ
Using 14M psi(2S) events taken with the BES-II detector, chi_cJ-->K+K-K+K- decays are studied. For the four-kaon final state, the branching fractions are B(chi_c0,1,2 -->K+K-K+K-)=…
Search for Invisible Decays of and in and
BES Collaboration
Using a data sample of decays collected with the BES II detector at the BEPC, searches for invisible decays of and in to and $ϕη^\pr…
Observation of a broad 1^-- resonant structure around 1.5 GeV/ in the K^+K^- mass spectrum in J/psi --> K^+K^-pi^0
BES Collaboration, M. Ablikim
A broad peak is observed at low K^+K^- invariant mass in J/psi --> K^+K^-pi^0 decays found in a sample of 5.8\times 10^7 J/psi events collected with the BESII detector. A partial w…
Pseudoscalar production at omega omega threshold in J/psi -> gamma omega omega
Bes Collaboration
The decay channel J/ψ->gamma omega omega, omega -> pi+ pi- pi0 is analyzed using a sample of 5.8x10^7 J/psi events collected with the BESII detector. The omega omega invariant mass…
Search for the Rare Decays J/Psi --> Ds- e+ nu_e, J/Psi --> D- e+ nu_e, and J/Psi --> D0bar e+ e-
BES Collaboration
We report on a search for the decays J/Psi --> Ds- e+ nu_e + c.c., J/Psi --> D- e+ nu_e + c.c., and J/Psi --> D0bar e+ e- + c.c. in a sample of 5.8 * 10^7 J/Psi events collected wi…
Partial wave analyses of J/psi to gamma pi^+ pi^- and gamma pi^0 pi^0
M. Ablikim
Results are presented on J/psi radiative decays to pi^+pi^- and pi^0pi^0 based on a sample of 58M J/psi events taken with the BESII detector. Partial wave analyses are carried out…
Observation of a near-threshold enhancement in the ωϕmass spectrum from the doubly OZI suppressed decay J/ψ\to γωϕ
BES Collaboration
An enhancement near threshold is observed in the ωϕinvariant mass spectrum from the doubly OZI suppressed decays of J/ψ\to γωϕ, based on a sample of 5.8 X 10^7 J/ψevents collected…
Measurements of decays into , , and
M. Ablikim
Based on events collected with BESII at the Beijing Electron-Positron Collider (BEPC), the decay branching fractions of , , and are measur…
Measurement of the branching fractions for , and
M. Ablikim, J. Z. Bai, BES Collaboration
The decay modes $\jpsi\arγπ^0, γη$ and $γ\etap$ are analyzed using a data sample of 58 million $\jpsi$ decays collected with the BESII detector at BEPC. The branching fractions are…
A measurement of the CP-conserving component of the decay KS -> pi+ pi- pi0
NA48 Collaboration
The NA48 collaboration has measured the amplitude of the CP-conserving component of the decay KS --> pi+ pi- pi0 relative to KL --> pi+ pi- pi0. For the characteristic parameter la…
Measurement of the cross section for e^+e^- -> ppbar at center-of-mass energies from 2.0 to 3.07 GeV
M. Ablikim
Cross sections for e^+e^- -> ppbar have been measured at 10 center-of-mass energies from 2.0 to 3.07 GeV by the BESII experiment at the BEPC, and proton electromagnetic form factor…
Measurement of the branching fractions of psi(2S) -> 3(pi+pi-) and J/psi -> 2(pi+pi-)
M. Ablikim
Using data samples collected at sqrt(s) = 3.686GeV and 3.650GeV by the BESII detector at the BEPC, the branching fraction of psi(2S) -> 3(pi+pi-) is measured to be [4.83 +- 0.38(st…
Measurements of Cabibbo Suppressed Hadronic Decay Fractions of Charmed D0 and D+ Mesons
BES Collaboration
Using data collected with the BESII detector at storage ring Beijing Electron Positron Collider, the measurements of relative branching fractions for seven Cabibbo sup…
BESII Detector Simulation
BES Collaboration
A Monte Carlo program based on Geant3 has been developed for BESII detector simulation. The organization of the program is outlined, and the digitization procedure for simulating t…
Measurement of Cross Sections for and Production in Annihilation at GeV
BES Collaboration
The cross sections for and production at 3.773 GeV have been measured with BES-II detector at BEPC. These measurements are made by analyzing a data sample…
Direct Measurement of the Pseudoscalar Decay Constant fD+
BES Collaboration
The absolute branching fraction of has been directly measured by an analysis of a data sample of about 33 collected around GeV with…
Direct Measurement of the Branching Fraction for the Decay of and Determination of
BES Collaboration
The absolute branching fraction for the decay is determined using singly tagged sample from the data collected around 3.773 Ge…
First observations of and decays to four-body final states
M. Ablikim
, , and decays to and , as well as decay to are presented. The branching fractions of these…
Measurements of decays into , , , , and
BES Collaboration
Decays of the into Vector plus Pseudoscalar meson final states have been studied with 14 million events collected with the BESII detector. Branching fractions of $ψ…
The pole in
BES Collaboration
Using a sample of 58 million events recorded in the BESII detector, the decay is studied. There are conspicuous and signals. At lo…
Direct Measurements of the Branching Fractions for and and Determinations of the Form Factors and
BES Collaboration
The absolute branching fractions for the decays and are determined using singly tagged sample from the dat…
Search for the Lepton Flavor Violation Processes and
BES collaboration
The lepton flavor violation processes and are searched for using a sample of 5.8 events collected with the BESII detector. Zero and one candidat…