R. L. McIlwain

CPT VIOLATION AND S-WAVE pi pi PHASE SHIFTS

L.J. Gutay, D. Duane Carmony, R. L. Eisner, F.J. Loeffler et autres

Inclusive decay B→ηX

Y. Kubota, Mark Joseph Lattery, Michael Momayezi, J. K. Nelson et autres

Using data samples taken at the $\ensuremath{\Upsilon}(4S)$ resonance and nearby continuum ${e}^{+}{e}^{\ensuremath{-}}$ annihilation with the CLEO-II detector at CESR, we have measured the inclusive branching fraction $\mathcal{B}(B\ensuremath{\rightarrow}\ensuremath{\eta}X)=(17.6\ifmmode\pm\else\textpm\fi{}1.1\ifmmode\pm\else\textpm\fi{}1.2)%$, and the momentum distribution of the $\ensuremath{\eta}$ mesons from $B$ meson decay. The $\ensuremath{\eta}$ yield …

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Measurements of B→ Ds+ X decays

D. Gibaut, K. Kinoshita, P. Pomianowski, Barry C. Barish et autres

This paper describes new measurements from CLEO of the inclusive B\ensuremath{\rightarrow}${\mathit{D}}_{\mathit{s}}^{+}$X branching fraction as well as the ${\mathit{B}}^{+}$\ensuremath{\rightarrow}${\mathit{D}}_{\mathit{s}}^{(\mathrm{*})+}$D${\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}}^{(\mathrm{*})0}$ and ${\mathit{B}}^{0}$\ensuremath{\rightarrow}${\mathit{D}}_{\mathit{s}}^{(\mathrm{*})+}$${\mathit{D}}^{(\mathrm{*})\mathrm{\ensuremath{-}}}$ branching fractions. The inclusive branching fraction is B(B\ensuremath{\rightarrow}${\mathit{D}}_{\mathit{s}}^{+}$X)=(12.11\ifmmode\pm\else\textpm\fi{}0.39\ifmmode\pm\else\textpm\fi{}0.88\ifmmode\pm\else\textpm\fi{}1.38)% where the first error is statistical, the second is the systematic error, and the …

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First Observation of Ξc+→Ξ0e+νe and an Estimate of the Ξc+Ξc0 Lifetime Ratio

J. Alexander, Chris J. Bebek, Karl Berkelman, K. Bloom et autres

Search forCPviolation in D0 decay

J. Bartelt, S. E. Csorna, Z. Egyed, V. Jain et autres

Using 2.7 ${\mathrm{fb}}^{\mathrm{\ensuremath{-}}1}$ of data taken with the CLEO II detector, we have searched for CP violation in the charm system. We looked for asymmetries in the number of decays of ${\mathit{D}}^{0}$'s and D${\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}}^{0}$'s to the CP eigenstates ${\mathit{K}}^{+}$${\mathit{K}}^{\mathrm{\ensuremath{-}}}$, ${\mathit{K}}_{\mathit{S}}^{0}$\ensuremath{\varphi}, and ${\mathit{K}}_{\mathit{S}}^{0}$${\mathrm{\ensuremath{\pi}}}^{0}$. …

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Inclusive decays ofBmesons to charmonium

R. Balest, K. Cho, W. T. Ford, Daniel R. Johnson et autres

We have used the CLEO-II detector at the Cornell Electron Storage Ringe (CESR) to study the inclusive production of charmonium mesons in a sample of 2.15 million BB\ifmmode\bar\else\textasciimacron\fi{} events. We find inclusive branching fractions of (1.12\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.06)% for B\ensuremath{\rightarrow}J/\ensuremath{\psi}X, (0.34\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.03)% for B\ensuremath{\rightarrow}\ensuremath{\psi}\ensuremath{'}X, and …

Measurement of the ratio of branching fractionsB( D0 → π− e+ νe )/B( D0 → K− e+ νe )

F. Butler, X. Fu, B. Nemati, W. R. Ross et autres

Using 3.0 ${\mathrm{fb}}^{\mathrm{\ensuremath{-}}1}$ of data collected with the CLEO-II detector, we study the Cabibbo-suppressed decay ${\mathit{D}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$${\mathit{e}}^{+}$${\ensuremath{\nu}}_{\mathit{e}}$. The ratio of the branching fractions B(${\mathit{D}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$${\mathit{e}}^{+}$${\ensuremath{\nu}}_{\mathit{e}}$)/B(${\mathit{D}}^{0}$\ensuremath{\rightarrow}${\mathit{K}}^{\mathrm{\ensuremath{-}}}$${\mathit{e}}^{+}$${\ensuremath{\nu}}_{\mathit{e}}$) is measured to be (10.3\ifmmode\pm\else\textpm\fi{}3.9\ifmmode\pm\else\textpm\fi{}1.3)%, corresponding to an upper limit of 15.6% at the 90% confidence level.

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Measurement of α from τ decays

T. E. Coan, J. Dominick, V. Fadeyev, I. Korolkov et autres

We present measurements of spectral moments extracted from the invariant mass distributions of the final states of hadronic τ decay products recorded in the CLEO detector. From a fit of theoretical predictions to the measurements of spectral moments and the total hadronic …

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Form Factor Ratio Measurement in Λc+→Λe+νe

G. Crawford, C. M. Daubenmier, R. Fulton, D. Fujino et autres

The angular distributions of the decay ${\ensuremath{\Lambda}}_{c}^{+}\ensuremath{\rightarrow}\ensuremath{\Lambda}{e}^{+}{\ensuremath{\nu}}_{e}$ have been studied using the CLEO II detector. By performing a three-dimensional maximum likelihood fit, the form factor ratio ${R\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}f}_{2}{/f}_{1}$ is determined to be $\ensuremath{-}0.25\ifmmode\pm\else\textpm\fi{}0.14\ifmmode\pm\else\textpm\fi{}0.08$. The decay asymmetry parameter of the ${\ensuremath{\Lambda}}_{c}$ averaged over ${q}^{2}$ …

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New Decay Modes of the Λc+ Charmed Baryon

Romain Ould Ammar, P. Baringer, A. Bean, D. Besson et autres

We have observed five new decay modes of the charmed baryon ${\ensuremath{\Lambda}}_{c}^{+}$ using data collected with the CLEO II detector. Four decay modes, ${\ensuremath{\Lambda}}_{c}^{+}\ensuremath{\rightarrow}p{\overline{K}}^{0}\ensuremath{\eta}$, $\ensuremath{\Lambda}\ensuremath{\eta}{\ensuremath{\pi}}^{+}$, ${\ensuremath{\Sigma}}^{+}\ensuremath{\eta}$, and ${\ensuremath{\Sigma}}^{*+}\ensuremath{\eta}$, are first observations of final states with an $\ensuremath{\eta}$ meson, while the fifth mode, …

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Measurement of the decay asymmetry parameters in Λ+ → Λπ+ and Λ+ → Σ+π0

M. Bishai, James Elliot Fast, E. Gerndt, J. W. Hinson et autres

We have measured the weak decay asymmetry parameters (αΛc) for two Λc+ decay modes. Our measurements are αΛc = −0.94−0.06−0.06+0.21+0.12 for the decay mode Λc+ → Λπ+ and αΛc = −0.45 ±0.31 ±0.06 for the decay mode Λc → Σ+ π0. By …

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Observation of Excited Charmed Baryon States Decaying to Λ c + π + π −

K. W. Edwards, Michael Ogg, ALAIN BELLERIVE, D. Britton et autres

Using data collected by the CLEO II detector, we have observed two states decaying to ${\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$. Relative to the ${\ensuremath{\Lambda}}_{c}^{+}$, their mass splittings are measured to be $+307.5\ifmmode\pm\else\textpm\fi{}0.4\ifmmode\pm\else\textpm\fi{}1.0$ and $+342.2\ifmmode\pm\else\textpm\fi{}0.2\ifmmode\pm\else\textpm\fi{}0.5\mathrm{MeV}{/c}^{2}$, respectively; this represents the first measurement of the less massive state. These …

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