Center for Russian, East European, and Eurasian Studies Scholarly Publications: Recent submissions
Now showing items 501-520 of 546
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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 ... -
Measurement of the relative branching fraction of gamma r(4S) to charged and neutral B-meson pairs
(AMERICAN PHYSICAL SOC, 2001-03)We analyze 9.7 X 10(6) B (B) over bar pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs produced at the Y(4S) resonance. We measure the rates for B-0 --> J/psiK((*)0) ... -
Measurement of the Lambda(+)(c) lifetime
(AMERICAN PHYSICAL SOC, 2001-03)The Lambda (+)(c) lifetime is measured using 9.0 fb(-1) of e(+)e(-) annihilation data collected on or just below the Y (4S) resonance with the CLEO ILV detector at CESR. Using an unbinned maximum likelihood fit, the Lambda ... -
Improved measurement of vertical bar V-cb vertical bar using (B)over-bar -> D(*)l(nu)over-bar decays
(AMERICAN PHYSICAL SOC, 2002-08)We determine the weak coupling \V-cb\ between the b and c quarks using a sample of 3x10(6) B (B) over bar events in the CLEO detector at the Cornell Electron Storage Ring. We determine the yield of reconstructed (B) over ... -
Hadronic mass moments in inclusive semileptonic B meson decays
(AMERICAN PHYSICAL SOC, 2001-12)We have measured the first and second moments of the hadronic mass-squared distribution in B --> X(c)l nu, for P-lepton > 1.5 GeV/c. We find (M-x(2) - (M) over bar (2)(D)) = 0.251 +/- 0.066 GeV2, ((M-X(2) - (M-X(2))(2)) = ... -
Experimental investigation of the two-photon widths of the chi(c0) and the chi(c2) mesons
(AMERICAN PHYSICAL SOC, 2001-08)Using 12.7 fb(-1) of data collected with the CLEO detector at CESR, we observed two-photon production of the c (c) over bar states chi (c0) and chi (c2) in their decay to pi (+)pi (-)pi (+)pi (-). We measured Gamma (gamma ... -
Observation of new states decaying into Lambda(+)(c)pi(-)pi(+)
(AMERICAN PHYSICAL SOC, 2001-05)Using 13.7 fb(-1) of data recorded by the CLEO detector at the Cornell Electron Storage Ring, we investigate the spectrum of charmed baryons which decay into Lambda (+)(c)pi (-)pi (+) and are more massive than the Lambda ... -
Search for the decay Y(1S) - gamma eta '
(AMERICAN PHYSICAL SOC, 2001-10)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' --> ... -
Bounds on the CP asymmetry in b -> s gamma decays
(AMERICAN PHYSICAL SOC, 2001-06)We have measured the CP asymmetry A(CP) equivalent to [Gamma (b --> sy) - Gamma((b) over bar --> ($) over bar gamma)]/[Gamma (b --> s gamma) + Gamma((b) over bar --> (s) over bar gamma)] to be A(CP) = (-0.079 +/- 0.108 +/- ...
