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Center for Russian, East European and Eurasian Studies: Recent submissions
Now showing items 501-520 of 554
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Observation of B -> K-+/-pi(0) and B -> K-0 pi(0) and evidence for B ->pi(+)pi(-)
(AMERICAN PHYSICAL SOC, 2000-07)We have studied charmless hadronic decays of B mesons into two-body final states with kaons and pions and observe three new processes with the following branching fractions: B(B --> pi(+)pi(-)) = (4.3(-1.4)(+1.6) +/- 0.5) ... -
Measurement of charm meson lifetimes
(AMERICAN PHYSICAL SOC, 1999-06)We report measurements of the D-0, D-,(+) and D-s(+) meson lifetimes using 3.7 fb(-1) of e(+)e(-) annihilation data collected near the Y(4S) resonance with the CLEO detector. The measured lifetimes of the D-0, D+, and ... -
Barok"t v slavjanskite literaturi. S osoben ogled na promenite v zhanrovata sistema na literaturite ot pravoslavnija region. Avtoreferat na disertacija za pris"zhdane na nauchnata i obrazovatelna stepen "Doktor" (05.04.06 - slavjanski literaturi)
(Sofijski universitet "Sv. Kliment Oxridski", Fakultet po slavjanski filologii, 2006-04-05) -
Observation of psi(3770)->gamma chi(c1)->gamma gamma J/psi
(AMERICAN PHYSICAL SOC, 2006-05)From e(+)e(-) collision data acquired with the CLEO detector at the Cornell Electron Storage Ring, we observe the non-D (D) over bar decay psi(3770)->gamma chi(c1) with a statistical significance of 6.6 standard deviations, ... -
Search for the decay (B)over-bar(0) -> D*(0)gamma
(AMERICAN PHYSICAL SOC, 2000-05)We report results of a search for the rare radiative decay (B) over bar(0) --> D*(0)gamma. Using 9.66 x 10(6) <B(B)over bar> meson pairs collected with the CLEO detector at the Cornell Electron Storage Ring, we set an upper ... -
Rate measurement of D0 -> K+pi-pi 0 and constraints on D-0 D(0)over-bar mixing
(AMERICAN PHYSICAL SOC, 2001-08)We present an observation and time-integrated rate measurement of the decay D-0-->K(+)pi (-)pi (0) produced in 9 fb(-1) of e(+)e(-) collisions near the Y(4S) resonance. The signal is inconsistent with an upward fluctuation ... -
First search for CP violation in tau lepton decay
(AMERICAN PHYSICAL SOC, 1998-11)We have performed the first search for CP violation in tau lepton decay. CP violation in lepton decay does not occur in the minimal standard model but can occur in extensions such as the multi-Higgs doublet model. It appears ... -
Search for CP violation in tau -> K pi nu(tau) decays
(AMERICAN PHYSICAL SOC, 2002-03)We search and find no evidence for CP violation in tau decays into the K pi v(tau) final state. We provide limits on the imaginary part of the coupling constant L describing a relative contribution of the CP violating ... -
Observation of exclusive (B)over-bar -> (DK*-)-K-(*) decays
(AMERICAN PHYSICAL SOC, 2002-03)We report the first observation of the exclusive decays (B) over bar --> D-(*K-)*(-), using 9.66 x 10(6) B (B) over bar pairs collected at the Y(4S) with the CLEO detector. We measure the following branching fractions: ... -
Observation of (B)over-bar(0)-> D-0 pi(0) and (B)over-bar(0)-> D*(0)pi(0)
(AMERICAN PHYSICAL SOC, 2002-02)We have studied the color-suppressed hadronic decays of neutral B mesons into the final states D-(*()0)pi(0). Using 9.67 x 10(6) B (B) over bar pairs collected with the CLEO detector, we observe the decays (B) over bar (0) ... -
Search for charmless B -> VV decays
(AMERICAN PHYSICAL SOC, 2002-01)We have studied two-body charmless decays of the B meson into the final states rho(o) rho(o), K(*o)rho(o), (KK*o)-K-*o, K-*o(K) over bar (*o), K(*+)rho(o), K*+, (K)over bar>(*o), and K*+K*- using only decay modes with ... -
First measurement of Gamma(D*(+))
(AMERICAN PHYSICAL SOC, 2001-12)We present the first measurement of the D*+ width using 9/fb of e(+)e(-) data collected near the Y(4S) resonance by the CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction method that takes ... -
Search for the familon via B-+/-->pi X-+/-(0), B-+/-->(KX0)-X-+/-, and B-0 ->(KSX0)-X-0 decays
(AMERICAN PHYSICAL SOC, 2001-12)We have searched for the two-body decay of the B meson to a light pseudoscalar meson h = pi (+/-), K+/-, K-S(0) and a massless neutral feebly interacting particle X-0 such as the familon, the Nambu-Goldstone boson associated ... -
First observation of the Sigma(*+)(c) baryon and a new measurement of the Sigma(*+)(c) mass
(AMERICAN PHYSICAL SOC, 2001-02)Using data recorded with the CLEO II and CLEO ILV detector configurations at the Cornell Electron Storage Rings, we report the first observation and mass measurement of the Sigma (c)*(+) charmed baryon, and an updated ... -
Study of B decays to charmonium states: B -> eta K-c and B -> chi K-c0
(AMERICAN PHYSICAL SOC, 2001-01)In a sample of 9.66 x 10(6) B(B) over bar pairs collected with the CLEO detector we make the first observation of B decays to an eta (c) and a kaon. We measure branching fractions B(B+ --> eta K-c(+)) = (0.69(-0.21)(+0.26) ... -
Improved upper limits on the flavor-changing neutral current decays B -> Kl(+)l(-) and B -> K*(892)l(+)l(-)
(AMERICAN PHYSICAL SOC, 2001-10)We have searched a sample of 9.6 x 10(6) B(B) over bar events for the flavor-changing neutral current decays B --> Kl(+)l(-) and B --> K*(892)l(+)l(-). We subject the latter decay to the requirement that the dilepton mass ... -
Branching fraction and photon energy spectrum for b -> s gamma
(AMERICAN PHYSICAL SOC, 2001-12)We have measured the branching fraction and photon energy spectrum for the radiative penguin process b --> s gamma. We find B(b --> s gamma) = (3.21 +/- 0.43 +/- 0.27(-0.10)(+0.18)) x 10(-4), where the errors are statistical, ... -
Study of tau decays to six pions and a neutrino
(AMERICAN PHYSICAL SOC, 2001-05)The tau decays to six-pion final states have been studied with the CLEO detector at the Cornell Electron Storage Ring. The measured branching fractions are B(tau (-) --> 2 pi (-)pi (-)3 pi (0)nu (tau)) = (2.2 +/- 0.3 +/- ... -
Search for B ->tau nu and B -> K nu(nu)over-bar
(AMERICAN PHYSICAL SOC, 2001-04)We report results of a search for B --> tau nu in a sample of 9.7 x 10(6) charged B meson decays. We exclusively reconstruct the companion B decay to suppress background. We set an upper limit on the branching fraction B(B ... -
First observation of the decays B-0 -> D*- p(p)over-tilde pi(+) and B-0 -> D*- p(n)over-bar
(AMERICAN PHYSICAL SOC, 2001-03)We report the first observation of exclusive decays of the type B --> D*N (N) over barX, where N is a nucleon. Using a sample of 9.7 X 10(6)B (B) over bar pairs collected with the CLEO detector operating at the Cornell ...
