Cornell University

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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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Showing 2005 · hep-exShow all

32 papers · 2 filters

hep-ex2005★ 30 cited

New Measurements of Cabibbo-Suppressed Decays of D Mesons in CLEO-c

P. Rubin, CLEO Collaboration

Using 281 pb^-1 of data collected with the CLEO-c detector, we report on first observations and new measurements of Cabibbo-suppressed decays of D mesons to 2, 3, 4, and 5 pions. B…

hep-ex2005★ 62 cited

Measurement of sigma(e^+e^- --> psi(3770) --> hadrons) at E_{cm}=3773 MeV

D. Besson

We measure the cross section for e^+e^- -> ψ(3770) -> hadrons at Ecm=3773 MeV to be (6.38+-0.08^{+0.41}_{-0.30}) nb using the CLEO detector at the CESR e^+e^- collider. The differe…

hep-ex2005★ 36 cited

Measurement of the Direct Photon Momentum Spectrum in Upsilon(1S), Upsilon(2S), and Upsilon(3S) Decays

D. Besson, CLEO Collaboration

Using data taken with the CLEO III detector at the Cornell Electron Storage Ring, we have investigated the direct photon spectrum in the decays Upsilon(1S) -> gggamma, Upsilon(2S)…

hep-ex2005★ 22 cited

Di-electron Widths of the Upsilon(1S,2S,3S) Resonances

CLEO Collaboration, J. L. Rosner

We determine the di-electron widths of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) resonances with better than 2% precision by integrating the cross-section of e+e- -> Upsilon ov…

hep-ex2005★ 19 cited

Measurement of Gamma_ee(J/psi), Gamma_tot(J/psi), and Gamma_ee[psi(2S)]/Gamma_ee(J/psi)

G. S. Adams, CLEO Collaboration

Using data acquired with the CLEO detector at the CESR e+e- collider at sqrt{s} = 3.773 GeV, we measure the cross section for the radiative return process e+e- --> gamma J/psi, J/p…

hep-ex2005★ 14 cited

Radiative Decays of the Upsilon(1S) to gamma pi^0 pi^0, and gamma eta eta and gamma pi^0 eta

D. Besson, CLEO Collaboration

We report on a study of exclusive radiative decays of the Upsilon(1S) resonance into the final states gamma pi^0 pi^0, gamma eta eta and gamma pi^0 eta, using 1.13 inverse femto-ba…

hep-ex2005★ 11 cited

Measurements of $J ψ$ decays into $ω π^{0}$ , $ω η$ , and $ω η^{'}$

M. Ablikim

Based on $5.8 \times 1 0^{7} J ψ$ events collected with BESII at the Beijing Electron-Positron Collider (BEPC), the decay branching fractions of $J ψ \to ω π^{0}$ , $ω η$ , and $ω η^{'}$ are measur…

hep-ex2005★ 20 cited

Experimental Study of chi_b(2P) --> pi pi chi_b(1P)

C. Cawlfield, CLEO Collaboration

We have searched for the di-pion transition chi_b(2P) -> pi pi chi_b(1P) in the CLEO III sample of Upsilon(3S) decays in the exclusive decay chain: Upsilon(3S) -> gamma chi_b(2P),…

hep-ex2005★ 60 cited

Radiative Decays of the Upsilon(1S) to a Pair of Charged Hadrons

S. B. Athar, CLEO Collaboration

Using data obtained with the CLEO~III detector, running at the Cornell Electron Storage Ring (CESR), we report on a new study of exclusive radiative Upsilon(1S) decays into the fin…

hep-ex2005★ 10 cited

Two Photon Width of chi_{c2}

S. Dobbs

The two-photon width of chi_c2 (^3P_2) state of charmonium has been measured using 14.4 fb^-1 of e+e- data taken at sqrt{s} = 9.46-11.30 GeV with the CLEO III detector. The two-pho…

hep-ex2005★ 133 cited

Precision Measurements of the Timelike Electromagnetic Form Factors of Pion, Kaon, and Proton

T. K. Pedlar, CLEO Collaboration

Using 20.7 pb^-1 of e+e- annihilation data taken at sqrt{s} = 3.671 GeV with the CLEO-c detector, precision measurements of the electromagnetic form factors of the charged pion, ch…

hep-ex2005★ 28 cited

Search for Exclusive Multi-Body Non-DbarD Decays at the psi(3770)

G. S. Huang, CLEO Collaboration

Using data collected at the psi(3770) resonance with the CLEO-c detector at the Cornell e^+e^- storage ring, we present searches for 25 charmless decay modes of the psi(3770), most…

hep-ex2005★ 44 cited

First Observation of psi(3770) --> gamma chi_{c1} --> gamma gamma J/psi

T. E. Coan, CLEO Collaboration

From e+e- collision data acquired with the CLEO detector at CESR, we observe the non-D Dbar decay psi(3770)->gamma chi_c1 with a statistical significance of 6.6 standard deviations…

hep-ex2005★ 66 cited

Decay of the psi(3770) to Light Hadrons

G. S. Adams, CLEO Collaboration

We describe a search for psi(3770) decay to two-body non-DDbar final states in e+e- data produced by the CESR collider and analyzed with the CLEO-c detector. Vector-pseudoscalar pr…

hep-ex2005★ 142 cited

Improved Measurement of cal{B}(D^+ --> mu^+ nu) and the Pseudoscalar Decay Constant f_{D^+}

M. Artuso, CLEO Collaboration

We extract a relatively precise value for the decay constant of the D+ meson by measuring B(D+ -> mu+ nu)=(4.40 +/- 0.66 {+0.09}{-0.12}) x 10^{-4}, using 281 inverse-pb of data tak…

hep-ex2005★ 33 cited

First Evidence and Measurement of B_s^() barB_s^() Production at the Upsilon(5S)

M Artuso, CLEO Collaboration

We use data collected by the CLEO III detector at CESR on the Upsilon(5S) resonance to measure the inclusive yield of Ds mesons. Comparing with data taken on the Upsilon(4S), which…

hep-ex2005★ 68 cited

Observation of the ^1P_1 State of Charmonium

P. Rubin, CLEO Collaboration

The spin-singlet P-wave state of charmonium, hc(1P1), has been observed in the decay psi(2S) -> pi0 hc followed by hc -> gamma etac. Inclusive and exclusive analyses of the M(hc) s…

hep-ex2005★ 25 cited

Search for Rare and Forbidden Decays D^+ --> h^pm e^mp e^+

Q. He

Using 0.8 million D^+D^- pairs collected with the CLEO-c detector at the psi(3770) resonance, we have searched for flavor-changing neutral current and lepton-number-violating decay…

hep-ex2005★ 73 cited

Observation of psi(3770)--> pi pi J/psi and Measurement of Gamma_{ee}[psi(2S)]

N. E. Adam, CLEO Collaboration

We observe signals for the decays psi(3770)--> X J/psi from data acquired with the CLEO detector operating at the CESR e^+e^- collider with sqrt{s}=3773 MeV. We measure the followi…

hep-ex2005★ 4 cited

Measuring Mass and Cross Section Parameters at a Focus Point Region

R. Gray, J. Alexander, K. M. Ecklund +6

The purpose of this study is to determine the experimental uncertainties in measuring mass and cross section parameters of SUSY particles at a 500 GeV Linear Collider. In this stud…

hep-ex2005★ 50 cited

Absolute Branching Fraction Measurements of Exclusive D^+ Semileptonic Decays

G. S. Huang

Using data collected at the psi(3770) resonance with the CLEO-c detector at the Cornell e+e- storage ring, we present improved measurements of the absolute branching fractions of D…

hep-ex2005★ 104 cited

Observation of h_c(^1P_1) State of Charmonium

J. L. Rosner, CLEO Collaboration

The h_c(1P1) state of charmonium has been observed in the reaction ψ(2S) -> \pi0 h_c -> (γγ)(γη_c) using 3.08 million ψ(2S) decays recorded in the CLEO detector. Data have been ana…

hep-ex2005★ 41 cited

Branching Fraction Measurements of psi(2S) Decay to Baryon-Antibaryon Final States