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Center for Russian, East European and Eurasian Studies: Recent submissions

Now showing items 461-480 of 554

    • Observation of an excited charmed baryon decaying into Xi(c)(0)pi(+) 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan (AMERICAN PHYSICAL SOC, 1996-07)
      Using data recorded by the CLEO II detector at the Cornell Electron Storage Ring, we report the first observation of an excited charmed baryon decaying into Xi c(0) pi(+). The state has mass difference M(Xi(c)(0) pi(+)) - ...

    • Wess-Zumino current and the structure of the decay tau(-)-> K-pi K--(+)nu(tau) 

      Besson, David Zeke (AMERICAN PHYSICAL SOC, 2004-06)
      We present the first study of the vector (Wess-Zumino) current in tau(-)-->K(-)pi(-)K(+)nu(tau) decay using data collected with the CLEO III detector at the Cornell Electron Storage Ring. We determine the quantitative ...

    • Photon transitions in Upsilon(2S) and Upsilon(3S) decays 

      Besson, David Zeke (AMERICAN PHYSICAL SOC, 2005-01)
      We have studied the inclusive photon spectra in Y(2S) and Y(3S) decays using a large statistics data sample obtained with the CLEO III detector. We present the most precise measurements of electric dipole (E1) photon ...

    • Measurement of the Ds(+) -> eta l(+)nu and Ds(+) → eta'l(+)nu branching ratios 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan (AMERICAN PHYSICAL SOC, 1995-11)
      Using the CLEO II detector we measure B(D-s(+) --> eta e(+)nu)/B(D-s(+) --> phi e(+)nu) = 1.24 +/- 0.12 +/- 0.15, B(D-s(+) --> eta'e(+)nu)/B(D-s(+) --> phi e(+)nu) = 0.43 +/- 0.11 +/- 0.07, and B(D-s(+) --> eta'e(+)nu)/B(D-s(+) ...

    • Measurement of the B -> Dl nu branching fractions and form factor 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, L. (AMERICAN PHYSICAL SOC, 1999-05)
      Using a sample of 3.3 x 10(6) B-meson decays collected with the CLEO detector at the Cornell Electron Storage Ring, we have studied B- --> D(0)l(-)<(nu)over bar> and (B) over bar(0) --> D(+)l(-)<(nu)over bar> decays, where ...

    • Observation of 1(-)0(-) final states from psi(2S) decays and e(+)e(-) annihilation 

      Besson, David Zeke (AMERICAN PHYSICAL SOC, 2005-01)
      Using CLEO data collected from CESR e(+)e(-) collisions at the psi(2S) resonance and nearby continuum at roots = 3.67 GeV, we report the first significantly nonzero measurements of light vector-pseudoscalar hadron pair ...

    • First observation of the decay B-0 -> D*D+*(-) 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, L. (AMERICAN PHYSICAL SOC, 1999-04)
      We have observed four fully reconstructed B-0 --> D*+D*- candidates in 5.8 x 10(6) Y(4S) --> B (B) over bar decays recorded with the CLEO detector. The background is estimated to be 0.31 +/- 0.10 events. The probability ...

    • Observation of the hadronic transitions chi(b1,2)(2P) -> omega Upsilon(1S) 

      Besson, David Zeke (AMERICAN PHYSICAL SOC, 2004-06)
      The CLEO Collaboration has made the first observations of hadronic transitions among bottomonium (b (b) over bar) states other than the dipion transitions among Y(nS) states. In our study of Y(3S) decays, we find a significant ...

    • Measurements of inclusive B ->psi production 

      Ammar, Raymond G.; Besson, David Zeke; Zhao, X. (AMERICAN PHYSICAL SOC, 2002-12)
      Using the combined CLEO II and CLEO II.V data sets of 9.1 fb(-1) at the Y(4S), we measure properties of psi mesons produced directly from decays of the B meson, where "B" denotes an admixture of B+, B-, B-0, and (B) over ...

    • Branching fractions of tau leptons to three charged hadrons 

      Besson, David Zeke; Zhao, X. (AMERICAN PHYSICAL SOC, 2003-05)
      From electron-positron collision data collected with the CLEO detector operating at Cornell Electron Storage Ring near roots=10.6 GeV, improved measurements of the branching fractions for tau decays into three explicitly ...

    • Measurement of the decay amplitudes and branching fractions of B->J/psi K-* and B->J/psi K decays 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan (AMERICAN PHYSICAL SOC, 1997-12)
      Using data taken with the CLEO II detector at the Cornell Electron Storage Ring, we present the first full angular analysis in the color-suppressed modes B-0 --> J/psi K*(0) and B+ --> J/psi K*(+). This leads to a complete ...

    • Analysis of D+->K-S((0))K+ and D+->K-S((0))pi(+) 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan (AMERICAN PHYSICAL SOC, 1997-04)
      Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, we present new measurements of the branching fractions for D+ --> KSK+ and D+ --> K-S pi(+). These results are combined with other CLEO ...

    • First observation of inclusive B decays to the charmed strange baryons xi(0)(c) and xi(+)(c) 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan (AMERICAN PHYSICAL SOC, 1997-11)
      Using data collected in the region of the Upsilon(4S) resonance with the CLEO II detector operating at the Cornell Electron Storage Ring (CESR), we present the first observation of B mesons decaying into the charmed strange ...

    • Culture and History Matter: Russia's Search for Identity after the Fall 

      Carlson, Maria (2007-04-11)
      Maria Carlson, professor and associate chair of Slavic Languages and Literatures at KU, presented the lecture “Culture and History Matter: Russia’s Search for Identity After the Fall” as the 2007 KU faculty speaker in the ...

    • Observation of eta '(c) production in gamma gamma fusion at CLEO 

      Besson, David Zeke (AMERICAN PHYSICAL SOC, 2004-04)
      We report on the observation of the eta(c)'(2(1)S(0)), the radial excitation of the eta(c)(1(1)S(0)) ground state of charmonium, in the two-photon fusion reaction gammagamma --> eta(c)' --> (KsK+/-)-K-0 pi(-/+) in 13.6 ...

    • Flavor-specific inclusive B decays to charm 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, G. J. (AMERICAN PHYSICAL SOC, 1998-02)
      We have measured the branching fractions for B --> (D) over bar X, B --> DX, and B --> (D) over bar Xl(+)v. From these results and some previously measured branching fractions, we obtain B(b --> c (c) over bar s) = (21.9 ...

    • Observation of B+->omega K+ and search for related B decays modes 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, L. (AMERICAN PHYSICAL SOC, 1998-07)
      We have searched for two-body charmless decays of B mesons to purely hadronic exclusive final states including omega or phi mesons using data collected with the CLEO II detector. With this sample of 6.6 x 10(6) B mesons ...

    • Search for rare and forbidden eta ' decays 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, X. (AMERICAN PHYSICAL SOC, 2000-01)
      We have searched for rare and forbidden decays of the eta' meson in hadronic events at the CLEO II detector. The search is conducted on 4.80 fb(-1) of e(+)e(-) collisions at 10.6 GeV center-of-mass energy at the Cornell ...

    • Investigation of semileptonic B meson decays to p-wave charm mesons 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan (AMERICAN PHYSICAL SOC, 1998-05)
      We have studied semileptonic B meson decays with a p-wave charm meson in the final state using 3.29 x 10(6) B (B) over bar events collected with the CLEO II detector at the Cornell Electron-Positron Storage Ring. We find ...

    • Observation of the radiative decay D*+-> D+gamma 

      Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, L. (AMERICAN PHYSICAL SOC, 1998-05)
      We have observed a signal for the decay D*(+) --> D(+)gamma at a significance of 4 standard deviations. From the measured branching ratio B(D*(+) --> D(+)gamma)/B(D*(+) --> D(+)pi(0)) = 0.055 +/- 0.014 +/- 0.010 we find ...