Showing papers by "Wolfgang Wagner published in 1986"
TL;DR: In this paper, a new apparatus has been specially developed for accurate measurements of the saturated-liquid and -vapour densities of pure fluids together with the vapour pressure along the whole coexistence curve (ranges covered: 50 to 350 K, 0.003 K and 0.02 K below the critical temperature).
232 citations
TL;DR: In this article, the saturation densities and the isothermal compressibilities near to the phase boundary were determined in the homogeneous part of the critical region of methane in the density range from 60 to 260 kg·m−3 with about 30 values on each of the isotherms.
49 citations
TL;DR: In this article, subjects watched a video-recording of a police interrogation of a woman who alleged she had been raped, and were randomly divided into pairs, in the individual-dyadic (ID) condition subjects first individually and subsequently as a dyad, free-recalled the interrogation, answered specific questions about it, and gave ratings of confidence.
Abstract: Subjects watched a video-recording of a police interrogation of a woman who alleged she had been raped. They were randomly divided into pairs. In the individual-dyadic (ID) condition subjects first individually, and subsequently as a dyad, free-recalled the interrogation, answered specific questions about it, and gave ratings of confidence. In the DI condition the order in which subjects undertook the tasks was reversed. Dyadic recall was no more complete when following than when preceding individual recall. Testimonial validity was, however, superior in the ID condition. Individual confidence, and not truth, was a better predictor of dyadic decision.
37 citations
TL;DR: A significant decrease in particle density is found in the angular region between quark and antiquark jet, and this effect is predicted in QCD as a result of destructive interference between soft-gluon radiation from quark, antiquark, and hard gluon.
Abstract: We compare the particle flow in the event plane of three-jet qq-barg (quark-antiquark-gluon) events with the particle flow in radiative annihilation events qq-bar..gamma.. (quark-antiquark-photon) for similar kinematic configurations. In the angular region between quark and antiquark jet, we find a significant decrease in particle density for qq-barg as compared to qq-bar..gamma... This effect is predicted in QCD as a result of destructive interference between soft-gluon radiation from quark, antiquark, and hard gluon.
35 citations
TL;DR: Measurements of two-particle correlations in rapidity· space between a p or A and an additional P. P. A or A are reported, and for the first time, a pronounced anticorrelation is observed between baryons with the same value of baryon number.
Abstract: We report measurements of two-particle correlations in . rapidity· space between a p or A and an additional P. P. A or A. We find evidence for local conservation of baryon number, and for the first time observe a pronounced anticorrelation between baryons with the same value of baryon number. Such an anticorrelation is expeCted in fragmentation models where the rapidity order of particles closely reflects their \"color order\", as is the case, for example, in recent versions of the Lund string model. Baryon production in e+eannihilation events provides a tool to investigate the process of quark fragmentation into hadrons. Not only is the pro·cess of baryon production itself interesting and the subject of much speculation 1, but also because baryons are heavy and suffer relatively little momentum smearing due to resonance decays, they provide a convenient probe to study the dynamics governing the production of primary hadrons from the color field of the initial quarks2. In this paper, we present data on baryon-baryon and baryon-antibaryon correlations, based on the analysis of events containing two or more P. P. A or A. The data were recorded with the TPC detector facility at the PEP e+estorage ring operating at 29 Ge V center-of-mass energy. The Time Projection Chamber3 (TPC) was used to track charged particles over 87% of 41t and to identify particles via their ionization energy loss. Data were taken in two different 4-etector configurations: a 77 pb-1 sample with the TPC operating in the 4 kG field of a normal solenoid, and a second sample of about 70 pb-1 with a 13.25 kG superconducting coil. At high momentum, typical momentum resolutions are 3.5% p [in GeV] and 0.65% p for the
29 citations
TL;DR: In this paper, the product Γ γγ ( η c )·B (η c → K S 0 K ± π ∓ ) is measured to be 0.5 −0.15 + 0.2 ± 0.1 keV.
18 citations
TL;DR: The two-photon production of the eta meson has been observed, and a value has been determined for the two- photon eta decay width by a measurement of the cross section sigma(e e e e eta) where eta elel.
Abstract: The two-photon production of the eta meson has been observed, and a value has been determined for the two-photon eta decay width by a measurement of the cross section sigma(e e e e eta) where eta elel. The measurement was made with the TPC/Two-Gamma facility at the SLAC e e collider PEP, with an accumulated data sample of 64.5 pb . The eta elel events were both triggered and detected by the pole-tip calorimeter. The measured two-photon eta decay width is GAMMA/sub etaarrow-rightgammagamma/ = 0.64 +- 0.14 (statistical) +- 0.13 (systematic) keV, in agreement with earlier similarly determined values.
14 citations
TL;DR: Upper limits are found for the partial decay width of a resonance into two photons, ranging from 50 keV at W = 4.5 GeV to 10 MeV atW = 19 GeV, which constrain theoretical models involving neutral composite bosons.
Abstract: We report on the first search with virtual photon-photon collisions for narrow, neutral resonances with even C parity in the mass range 4.5..e/sup +/e/sup -/..gamma../sup */..gamma../sup */..-->..e /sup +/e/sup -/R with both the scattered e/sup +/ and e/sup -/ detected. We find upper limits (95% confidence level) for the partial decay width of a resonance into two photons, ranging from 50 keV at W = 4.5 GeV to 10 MeV at W = 19 GeV. These limits constrain theoretical models involving neutral composite bosons.
4 citations
01 Jan 1986
1 citations