32539092
Measurement of the mass of the tau lepton.
The mass of the [tau] lepton has been measured at the Beijing Electron-Positron Collider using the Beijing Spectrometer. A search near threshold for [ital e][sup +][ital e[minus]][r arrow][tau][sup +][tau][sup [minus]] was performed. Candidate events were identified by requiring that one [tau] decay via [tau][r arrow][ital e][nu][bar [nu]], and the other via [tau][r arrow][mu][nu][bar [nu]]. The mass value, obtained from a fit to the energy dependence of the [tau][sup +][tau][sup [minus]] cross section, is [ital m][sub [tau]]=1776.9[sub [minus]0.5][sup +0.4][plus minus]0.2 MeV.
62367752
Java Analysis Studio
Java Analysis Studio is a desktop data analysis application aimed primarily at offline analysis of high-energy physics data. The goal is to make the application independent of any particular data format, so that it can be used to analyze data from any experiment. The application features a rich graphical user interface (GUI) aimed at making the program easy to learn and use, but which at the same time allows the user to perform arbitrarily complex data analysis tasks by writing analysis modules in Java. The application can be used either as a standalone application, or as a client for a remote Java Data Server. The client-server mechanism is targeted particularly at allowing remote users to access large data samples stored on a central data center in a natural and efficient way.
125264310
Symmetry tests in polarized Z0 decays to b anti-b g
182181324
A Measurement of the left-right, forward - backward asymmetry for charm quarks using D*+ and D+ mesons
Longitudinal polarization of the SLC e{sup {minus}} beam allows a direct measurement of the left-right, forward-backward asymmetry of c-quarks to be made with the SLD. Events from Z{sup 0} {yields} c{bar c} are tagged using fully and partially reconstructed decays of D{sup *+} mesons, and fully reconstructed decays of D{sup +} mesons. The authors measure A{sub c} = 0.77 {+-} 0.22(stat.) {+-} 0.10(syst.).
208781283
Observations of Milky Way Dwarf Spheroidal galaxies with the Fermi-LAT detector and constraints on Dark Matter models
We report on the observations of 14 dwarf spheroidal galaxie s with theFermi Gamma-Ray Space Telescope taken during the first 11 months of survey mod e operations. TheFermi telescope, which is conducting an all-sky γ-ray survey in the 20 MeV to>300 GeV energy range, provides a new opportunity to test particle dark matter mode ls through the expected γ-ray emission produced by pair annihilation of weakly interacting ma ssive particles (WIMPs). Local Group dwarf spheroidal galaxies, the largest galactic subs tr ctures predicted by the cold dark 31University of Alabama in Huntsville, Huntsville, AL 35899, USA 32Department of Physics, Center for Cosmology and Astro-Part icle Physics, The Ohio State University, Columbus, OH 43210 , USA 33Department of Physics, Royal Institute of Technology (KTH) , AlbaNova, SE-106 91 Stockholm, Sweden 34UCO/Lick Observatories, Santa Cruz, CA 95064, USA 35Department of Physics, Tokyo Institute of Technology, Megu ro City, Tokyo 152-8551, Japan 36Waseda University, 1-104 Totsukamachi, Shinjuku-ku, Toky o, 169-8050, Japan 37Centre d’́ Etude Spatiale des Rayonnements, CNRS /UPS, BP 44346, F-30128 Toulouse Cedex 4, France Center for Research and Exploration in Space Science and Tec hnology (CRESST), NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, and Università di Trieste, I-34127 Trieste, Italy 40Istituto Nazionale di Fisica Nucleare, Sezione di Roma “Tor Vergata”, I-00133 Roma, Italy 41Department of Physics and Astronomy, University of Denver, Denver, CO 80208, USA 42Max-Planck Institut für extraterrestrische Physik, 8574 8 Garching, Germany 43Institut für Astround Teilchenphysik and Institut für T heoretische Physik, Leopold-Franzens-Universität Inns bruck, A-6020 Innsbruck, Austria 44Institut de Ciencies de l’Espai (IEEC-CSIC), Campus UAB, 08 193 Barcelona, Spain 45Space Sciences Division, NASA Ames Research Center, Mo ffett Field, CA 94035-1000, USA 46NYCB Real-Time Computing Inc., Lattingtown, NY 11560-1025 , USA Department of Chemistry and Physics, Purdue University Cal umet, Hammond, IN 46323-2094, USA 48Institute of Space and Astronautical Science, JAXA, 3-1-1 Y oshinodai, Sagamihara, Kanagawa 229-8510, Japan 49Institució Catalana de Recerca i Estudis Avançats (ICREA ), Barcelona, Spain 50Consorzio Interuniversitario per la Fisica Spaziale (CIFS ), I-10133 Torino, Italy 51University of Maryland, Baltimore County, Baltimore, MD 21 50, USA 52Dipartimento di Fisica, Università di Roma “Tor Vergata”, I-00133 Roma, Italy 53School of Pure and Applied Natural Sciences, University of K almar, SE-391 82 Kalmar, Sweden 54Center for Cosmology, Physics and Astronomy Department, Un iversity of California, Irvine, CA 92697-2575, USA
17271720
Direct measurement of parity violation in the coupling of Z(0) bosons to b quarks using a mass tag and momentum-weighted track charge
We present a direct measurement of the parity-violation parameter A{sub b} using a self-calibrating track-charge technique. In the SLAC Linear Collider Large Detector (SLD) experiment we observe hadronic decays of Z{sup 0} bosons produced in collisions between longitudinally polarized electrons and unpolarized positrons at the SLAC Linear Collider. A sample of b{bar b} events is selected using the topologically reconstructed mass of B hadrons. From our 1993{endash}1995 sample of approximately 150000 hadronic Z{sup 0} decays, we obtain A{sub b}=0.911{plus_minus}0.045(stat) {plus_minus}0.045(syst) . {copyright} {ital 1998} {ital The American Physical Society}
44328417
Bag formation in a chiral model.
We show that a bag can be automatically formed in a model where the Skyrme Lagrangian is modified to possess the correct QCD scaling behavior.
7913664
Energy dependence of pion inelastic scattering to the 1(+) states in 12C.
The energy dependence of cross sections for inelastic pion scattering to the /Delta/ = /Delta/ = /Delta/ = 1 transition at 15.11 MeV in /sup 12/C is found to map very closely the /Delta/ = /Delta/ = /Delta/+1 /pi/-nucleon scattering cross sections at beam energies from 50 to 295 MeV. This free /pi/-nucleon energy dependence is due to the prominent /Delta/sub 3/2,3/2/ resonance, corresponding to the first excited nucleon state, which is mirrored in the /pi/-nucleus system with little alteration.
31307451
Double analog state in odd-A nuclei.
Measurements were performed using pion double charge exchange to observe the double isobaric analog state (DIAS) in the odd-[ital A] nuclei [sup 54]V, [sup 59]Co, [sup 115]In, and [sup 197]Au. These results are combined with data for other odd-[ital A] targets and used to investigate the [ital N], [ital Z], and [ital A] dependence of DIAS cross sections.
30895858
CP violation and generation mixing.
35715192
Realistic pseudoscalar-vector chiral Lagrangian and its soliton excitations.
A reasonable low-energy chiral Lagrangian of vectors and pseudoscalars involves three a priori unknown coefficients for terms proportional to the Levi-Civita symbol epsilon/sub ..mu..//sub ..nu..//sub ..cap alpha..//sub ..beta../. We argue that these cannot, from a theoretical standpoint, be reliably determined by consideration of electromagnetic processes. Hence we use purely strong-interaction processes which enable us to determine two out of three of these. We examine the nucleon as a soliton excitation in the model and find that adjustment of the third parameter does not greatly change the, in most respects accurate, description of the nucleon obtained in a previous treatment by Meissner, Kaiser, and Weise. The paper includes a new and careful formulation of the addition of electromagnetism to the full Lagrangian.