16140569
Determination of the phase of V(ub) from charmless hadronic B decay rates
We perform a model dependent fit to recent data on charmless hadronic B decays and determine $\gamma$, the phase of $V^*_{ub}$. We find $\gamma = 114^{+25}_{-21}$ degrees, which disfavors the often quoted $\gamma \sim 60^\circ$ at the two standard deviation level. We also fit for the form factors $F_0^{B\pi}$ and $A_0^{B\rho}$, and the strange-quark mass. They are consistent with theoretical expectations, although $m_s$ is somewhat low. Such agreement and the good $\chi^2$ for the fit may be interpreted as a confirmation of the adequacy of our model assumptions.
122233998
Comparison and summary of tau topological branching fractions
After nearly two decades of work on topological branching fractions, it appears that an experimental consensus is forming. The new world average is 14.54 ± 0.20.
17397470
Inclusive decays of B mesons to charmonium.
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 {ital B{bar B}} events. We find inclusive branching fractions of (1.12{plus_minus}0.04{plus_minus}0.06)% for {ital B}{r_arrow}{ital J}/{psi}{ital X}, (0.34{plus_minus}0.04{plus_minus}0.03)% for {ital B}{r_arrow}{psi}{prime}{ital X}, and (0.40{plus_minus}0.06{plus_minus}0.04)% for {ital B}{r_arrow}{chi}{sub {ital c}1}{ital X}. We also find some evidence for the inclusive production of {chi}{sub {ital c}2}, and set an upper limit for the branching fraction of the inclusive decay {ital B}{r_arrow}{eta}{sub {ital c}}{ital X} of 0.9% at 90% confidence level. Momentum spectra for inclusive {ital J}/{psi}, {psi}{prime}, and {chi}{sub {ital c}1} production are presented. These measurements are compared to theoretical calculations.
35600922
Measurement of the branching fraction for D+-->K- pi + pi +
Using the CLEO-II detector at CESR we have measured the ratio of branching fractions, B(D+ → K−π+π+)/B(D0 → K−π+) = 2.35 ± 0.16 ± 0.16. Our recent measurement of B(D0 → K−π+) then gives B(D+ → K−π+π+) =
15188676
Calibration and performance of the MARK II drift chamber vertex detector
We have calibrated and studied the performance of the MARK II drift chamber vertex detector with cosmic ray tracks collected with the chamber inside the MARK II detector at the SLC. The chamber achieves 30 {mu}m impact parameter resolution and 500 {mu}m track-pair resolution using CO{sub 2}/C{sub 2}H{sub 6}H{sub 6}(92/8) at 2 atmospheres pressure. The chamber has successfully recorded Z{sup 0} decays at the SLC, and resolved tracks in dense hadronic jets with good efficiency and high accuracy. 5 refs., 13 figs.
120135663
Studies of tau decay modes with K0 mesons from CLEO
We examine five final states involving K 0 mesons, presenting branching fractions for the decays τ → K 0 πν τ , τ → K 0 ππ 0 ν τ , τ → K 0 Kν τ , τ → K 0 Kπ 0 ν τ , and τ → K s K s hν τ . The mass spectra provide evidence for the dominant role of K * in Kπ decays and K 1 in Kππ modes. We find evidence for a significant K * K contribution to the KKπ decays.
120637935
Associated charm production and correlations between multileptons in (anti)neutrino interactions
Associated charm production and decay in (anti)neutrino interactions has often been proposed to explain the (anti)neutrino like-sign dimuon events. We show that a particular phenomenological model of $c\overline{c}$ production and decay is also capable of explaining both the ${\ensuremath{\mu}}^{\ensuremath{-}}{e}^{\ensuremath{-}}$ events seen recently in bubble-chamber experiments and a specific fraction of the neutrino-induced trimuon events. The correlations between these different reaction channels strengthen the conclusion that $c\overline{c}$ pairs are formed in approximately 1% of all deep-inelastic (anti)neutrino interactions.
120439805
Heavy-lepton-cascade interpretation of the neutrino-induced trimuon events
The experimental data on neutrino-induced trimuon production are compared with the results of a cascade model involving two heavy leptons. The agreement between theory and experiment is excellent.
16148239
Heavy-quark correlations in deep-inelastic electroproduction
Abstract We have completed the next-to-leading order perturbative QCD corrections to the virtual-photon exclusive differential cross sections for heavy quark production in deep-inelastic electron-proton scattering, i.e. e + P a Q + Q + X . Using these results, we have computed distributions which are sensitive to correlations among the heavy quark, the heavy antiquark, and the associated jet. Some predictions for charm and bottom heavy quark production at the electron-proton collider HERA are presented.
16345343
NLO distributions for Higgs production at the LHC
We report on results for the NLO corrected differential distributions dσdpT and dσdy for the process p + p → H +′ X ′, where pT and y are the transverse momentum and rapidity of the Higgs-boson H respectively and X denotes the inclusive hadronic state. All QCD partonic subprocesses have been included. The computation is carried out in the limit that the top-quark mass mt → ∞. Our calculations reveal that the dominant subprocess is given by g + g → H +′ X′ but the reaction g + q(q) → H +′ X′ is not negligible. Also the K-factor representing the ratio between the next-to-leading order and leading order differential distributions varies from 1.4 to 1.7 depending on the kinematic region and choice of parton densities.
115908540
Radiative corrections to the decay pi0 ---> gamma e+ e-