Bulletin of the American Physical Society
2005 72nd Annual Meeting of the Southeastern Section of the APS
Thursday–Saturday, November 10–12, 2005; Gainesville, FL
Session HB: Particle Physics |
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Chair: John Yelton, University of Florida Room: Hilton Hawthorne |
Friday, November 11, 2005 2:00PM - 2:12PM |
HB.00001: Towards a BF and Form Factor Measurement in $D^0\to K^{\ast -}e^+\nu _e $ Decays Hongxuan Liu, Milind Purohit Using data from the BaBar experiment, we study form factors in $D^0\to K^{\ast -}e^+\nu _e $ decays. These form factors, which are Lorentz-invariant functions of $q^2$ and decay angles, are predicted in several models. We expect to obtain high statistics in this decay mode and therefore to measure the form factors in a model-independent way. At this point we present very preliminary results based on a small subsample of available data. [Preview Abstract] |
Friday, November 11, 2005 2:12PM - 2:24PM |
HB.00002: Search for Y(1S) to $\gamma$$\eta$ and $\gamma$$\eta'$ Vijay Potlia, John Yelton Using a data sample of around 20,000,000 Upsilon(1S) decays collected by the CLEO III detector at CESR, we present the results of a search for the exclusive decays Upsilon(1S) into $\gamma$ $\eta$ and Upsilon(1s) into $\gamma$ $\eta'$. [Preview Abstract] |
Friday, November 11, 2005 2:24PM - 2:36PM |
HB.00003: Experimental study of terrestrial antineutrinos with KamLAND Mikhail Batygov The Kamioka Liquid scintillator AntiNeutrino Detector (KamLAND) is a low-energy, low-background neutrino detector built with the primary goal of detecting reactor anineutrino oscillations. Additionally, it has proven to be a useful tool for observation antineutrinos from terrestrial $^{238}$U and $^{232}$Th decays. The first experimental study of terrestrial antineutrinos was performed using KamLAND. The present measurement of the antineutrino fluxes and spectra is consistent with current geophysical models and constrains the antineutrino emission from U and Th in the planet to less than 1.45x10$^{-30}$ per target per proton per year at 99{\%} CL. [Preview Abstract] |
Friday, November 11, 2005 2:36PM - 2:48PM |
HB.00004: Search for Psi(3770) Decays into non D-Dbar States Rukshana Patel, John Yelton Using the world's current largest data sample of psi(3770) charmonium resonance taken by the CLEO-c detector operating at the Cornell Electron Storage Ring, we present new results on a search for psi(3770) decays into non D-Dbar states. We compare the results of the search with the predictions based upon the mixing models and the perturabtive QCD 12\% rule to provide a better understanding of many aspects of charmonia. [Preview Abstract] |
Friday, November 11, 2005 2:48PM - 3:00PM |
HB.00005: The Production of $\Lambda $ and $\Sigma ^{0}$ Hyperons in Antineutrino--Proton Scattering Lingling Wen, Stephan Mintz We obtain total and differential cross sections from near threshold to several GeV for the strangeness changing charged current reactions, $\overline \nu _{L}$+ p $\to \Lambda $+ L$^{+ }$and $\overline \nu _{L}$+ p $\to \Sigma ^{0}$+ L$^{+ }$ , where L stands for an electron , muon or tau lepton. We also obtain the contributions of the various form factors to the total and differential cross sections and gives the estimates for the individual form factors, and discuss the F$_{E}$ and F$_{S}$ form factors for both reactions. This work is in support of possible experiments by the MINER$\nu $ A collaboration. The calculations are phenomenologically based and make use of SU(2) and SU(3) symmetry and related decay processes to obtain those form factors. These reactions may be useful as a test of the SU(3) obtained form factors over a range of q$^{2}$. [Preview Abstract] |
Friday, November 11, 2005 3:00PM - 3:12PM |
HB.00006: Measurement of the Photon Structure Function $F_2^\gamma $ with the L3 Detector at LEP. Gyongyi Baksay, Marcus Hohlmann, Maria Kienzle The $\mbox{e}^{^+}\mbox{e}^{^-}\to \mbox{e}^{^+}\mbox{e}^{^-}$hadrons reaction, where one of the two electrons is detected in a low polar-angle calorimeter, is analyzed in order to measure the hadronic photon structure function $F_2^\gamma $. The full high-energy and high-luminosity data set, collected with the L3 detector at centre-of-mass energies 189-209 GeV, corresponding to an integrated luminosity of 608 pb$^{-1}$ is used. The Q$^{2}$ range 11-34 GeV$^{2}$ and the x range 0.006-0.556 are considered. The data are compared with recent parton density functions. [Preview Abstract] |
Friday, November 11, 2005 3:12PM - 3:24PM |
HB.00007: Leptonic Structure Functions of Photons Klaus Dehmelt, Laszlo Baksay, Marcus Hohlmann Single-tagged reactions $e^+e^-\to e^+e^-\mu ^+\mu ^-$ are studied with the L3 detector at the Large Electron Positron collider (LEP). The leptonic structure function $F_2^\gamma $ and azimuthal correlations of the produced lepton pairs can be extracted from the cross-section measurements. Furthermore, the reaction can be used to obtain two more structure functions, $F_A^\gamma ,\mbox{ }F_B^\gamma $, which are related to different helicity states of the colliding photons. This allows measuring the structure functions for transversely and longitudinally polarized virtual photons. The formalism and procedures for the measurements will be presented. [Preview Abstract] |
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