D. T. Gong

Search for {psi}(2S){yields}{gamma}{eta}{sub c}(2S) via fully reconstructed {eta}{sub c}(2S) decays

We report a search for the decay {psi}(2S){yields}{gamma}{eta}{sub c}(2S) in a sample of 25.9x10{sup 6} {psi}(2S) events collected with the CLEO-c detector. No signals are observed in any of the 11 exclusive {eta}{sub c}(2S) decay modes studied, or in their sum. Product branching fraction upper limits are determined as a function of {Gamma}[{eta}{sub c}(2S)] for the 11 individual modes.

Study of the Decays D{sup 0}{yields}{pi}{sup -}e{sup +}{nu}{sub e}, D{sup 0}{yields}K{sup -}e{sup +}{nu}{sub e}, D{sup +}{yields}{pi}{sup 0}e{sup +}{nu}{sub e}, and D{sup +}{yields}K{sup 0}e{sup +}{nu}{sub e}

By using 1.8x10{sup 6} DD pairs, we have measured B(D{sup 0}{yields}{pi}{sup -}e{sup +}{nu}{sub e})=0.299(11)(9)%, B(D{sup +}{yields}{pi}{sup 0}e{sup +}{nu}{sub e})=0.373(22)(13)%, B(D{sup 0}{yields}K{sup -}e{sup +}{nu}{sub e})=3.56(3)(9)%, and B(D{sup +}{yields}K{sup 0}e{sup +}{nu}{sub e})=8.53(13)(23)% and have studied the q{sup 2} dependence of the form factors. By combining our results with recent lattice calculations, we obtain |V{sub cd}|=0.217(9)(4)(23) and |V{sub cs}|=1.015(10)(11)(106)

Radiative decays of the {upsilon}(1S) to {gamma}{pi}{sup 0}{pi}{sup 0}, {gamma}{eta}{eta} and {gamma}{pi}{sup 0}{eta}

We report on a study of exclusive radiative decays of the Υ(1S) resonance into the final states γπ0π0, γηη and γπ0η, using 1.13 fb−1 of e+e− annihilation data collected at √ s = 9.46GeV with the CLEO III detector operating at the Cornell Electron Storage Ring. In the channel γπ0π0, we measure the branching ratio for the decay mode Υ(1S) → γf2(1270) to be (10.5 ± 1.6 (stat) +1.9 −1.8 (syst)) × 10−5. We place upper limits on the product branching ratios for the isoscalar resonances f0(1500) and f0(1710) for the π 0π0 and ηη decay channels. We also set an upper limit on the Υ(1S) radiative decay into π0η. PACS numbers: 13.20.Gd, 12.39.Mk

Search for {psi}(2S){yields}{eta}{sub c}{pi}{sup +}{pi}{sup -}{pi}{sup 0}

Using 5.63 pb{sup -1} of data accumulated at the {psi}(2S) resonance with the CLEO III and CLEO-c detectors corresponding to 3.08x10{sup 6} {psi}(2S) decays, a search is performed for the decay {psi}(2S){yields}{eta}{sub c}{pi}{sup +}{pi}{sup -}{pi}{sup 0} to test a theoretical prediction based upon the assumption that the cc pair in the {psi}(2S) does not annihilate directly into three gluons but rather survives before annihilating. No signal is observed, and a combined upper limit from six {eta}{sub c} decay modes is determined to be B({psi}(2S){yields}{eta}{sub c}{pi}{sup +}{pi}{sup -}{pi}{sup 0}){<=}1.0x10{sup -3} at 90% C.L. This upper limit is about an order of magnitude below the theoretical expectation.Using

Measurement of {sigma}(e{sup +}e{sup -}{yields}{psi}(3770){yields}hadrons) at E{sub c.m.}=3773 MeV

5.63\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}

Model independent measurement of form factors in the decay D{sup +}{yields}K{sup -}{pi}{sup +}e{sup +}{nu}{sub e}

of data accumulated at the

Erratum: Measurement of {sigma}(e{sup +}e{sup -{yields}{psi}}(3770){yields}hadrons) at E{sub c.m.}=3773 MeV[Phys. Rev. Lett. 96, 092002 (2006)]

\ensuremath{\psi}(2S)

Erratum: Measurement of Ï(e{sup +}e{sup -âÏ}(3770)âhadrons) at E{sub c.m.}=3773 MeV[Phys. Rev. Lett. 96, 092002 (2006)]

resonance with the CLEO III and CLEO-c detectors corresponding to

Study of the Decays D°e{sup +}{sub e}, D°Ke{sup +}{sub e}, D{sup +}°e{sup +}{sub e}, and D{sup +}K°e{sup +}{sub e}

3.08\ifmmode\times\else\texttimes\fi{}{10}^{6}