Publications (12)14.74 Total impact
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Article: First Measurement of Γ (D^{*+})
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ABSTRACT: We present the first measurement of the D 1 width using 9fb of e1e2 data collected near the Y4S resonance by the CLEO II. V detector. Our method uses advanced tracking techniques and a reconstruction method that takes advantage of the small vertical size of the Cornell Electron-positron Storage Ring beam spot to measure the energy release distribution from the D 1! D0p1 decay.Physical Review Letters 11/2001; 87(25):251801. · 7.37 Impact Factor -
Article: Observation of B→ φK and B→ φK^{*}
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ABSTRACT: We have studied two-body charmless hadronic decays of B mesons into the final states fK and fK. Using 9.7 million BB pairs collected with the CLEO II detector, we observe the decays B2! fK2 and B0! fK 0 with the following branching fractions: B (B2! fK2)(5.512. 1 21.8 6 0.6) 3 1026 and B (B0! fK 0)(11.514. 511.8 23.721. 7) 3 1026. We also see evidence for the decays B0! fK0 and B2! fK 2. However, since the statistical significance is not overwhelming for these modes, we determine upper limits of, 12.3 3 1026 and, 22.5 3 ...Physical Review Letters 04/2001; 86(17):3718-3721. · 7.37 Impact Factor -
Article: Evidence of new states decaying into Xi*(c)pi
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ABSTRACT: Using 13.7 fb(-1) of data recorded by the CLEO detector at Cornell Electron Storage Ring, we report evidence of two new charmed baryons: one decaying into Xi (0 ')(c)pi (+) with the subsequent decay Xi (0)(c)' --> Xi (0)(c)gamma, and its isospin partner decaying into Xi (+)(c)' pi (-) followed by Xi (+)(c)' --> Xi (+)(c)gamma. We measure the following mass differences for the two states: M(Xi (0)(c)gamma pi (+)) - M(Xi (0)(c)) = 318.2 +/- 1.3 +/- 2.9 MeV and M(Xi (+)(c)gamma pi (-)) - M(Xi (+)(c)) = 324.0 +/- 1.3 +/- 3.0 MeV. We interpret these new states as the J(P) = 1/2(-) Xi (c1) particles, the charmed-strange analogs of the Lambda (+)(c1)(2593). -
Article: Search for the decay Y(1S) - gamma eta '
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ABSTRACT: We report on a search for the radiative decay Y(1S) --> gamma eta' in 61.3 pb(-1) of data taken with the CLEO II detector at the Cornell Electron Storage Ring. Three decay chains were investigated, all involving eta' --> pi (+) pi (-) eta, followed by eta --> gamma gamma, eta --> pi (0)pi (0)pi (0), or eta --> pi (+) pi (-) pi (0). We find no candidate events in any of the three cases and set a combined upper limit of 1.6 X 10(-5) at 90% C.L., significantly smaller than the previous limit. We compare our result to other radiative Y decays, to radiative J/psi decays, and to theoretical predictions. -
Article: Analysis of D+ -> K- pi(+)e(+)nu(e) and D+ -> K- pi(+)mu(+)nu(mu) semileptonic decays
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Article: Measurement of absolute branching fractions of inclusive semileptonic decays of charm and charmed-strange mesons
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Article: Measurements of branching fractions for electromagnetic transitions involving the chi(bJ)(1P) states
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Article: Search for the decay J/psi -> gamma plus invisible
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Article: Measurement of the pseudoscalar decay constant f(Ds) using D-s(+)->tau(+)nu, tau(+)->rho(+)nu decays
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Article: Gamma(1S) -> gamma f(2)'(1525); f(2)'(1525) -> (KSKS0)-K-0 decays
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Article: Study of psi(2S) decays to gamma p(p)over-bar, pi(0) p(p)over-bar, and eta p(p)over-bar, and search for p(p)over-bar threshold enhancements
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Article: Branching fractions for chi(cJ) -> p(p)over-bar pi(0), p(p)over-bar eta, and p(p)over-bar omega