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Has the charm deficit really vanished

Description: Many experiments have observed charmed particles inclusively in e/sup +/e/sup -/ annihilation, hadro-, photo-, and neutrino- production, and recently in the direct cascade process from B meson decay. The scale of these measurements is set largely by the branching ratios B(D/sup 0/ ..-->.. K/sup -/..pi../sup +/) and B(D/sup +/ ..-->.. K/sup -/..pi../sup +/..pi../sup +/). These branching fractions have been measured by attributing the enhancement in the total hadronic cross section at the psi(3770) resonance to D anti D production, and normalizing the rates for K/sup -/..pi../sup +/ and K/sup -/..pi../sup +/..pi../sup +/ accordingly. These height measurements however exhibit a wide variance. Two years ago a new technique for measuring branching fractions was introduced by the Mark III, which largely avoided the cross section normalization. The result, however, yielded significantly larger values for all branching ratios while leaving their relative values unchanged. In turn, it created a problem for subsequent high statistics inclusive measurements of charm (in particular the continuum e/sup +/e/sup -/ production rate and B cascade decay rates) where an approx.50% ''deficit'' of charm was claimed to exist by CLEO. With the rescaling downward by 24% (21%) of the Mark III D/sup 0/ (D/sup +/) values, the so-called ''charm deficit'' is again addressed in this review. Also introduced here are new measurements from ARGUS and HRS which also directly address the issue of charm normalization with statistics comparable to other measurements. Finally, an attempt is made to understand the whole body of psi(3770) resonance data. 13 refs.
Date: September 1, 1987
Creator: Schindler, R.H.
Partner: UNT Libraries Government Documents Department

An experimental review of the decays of the D/sub S/ meson

Description: In this paper I review the current experimental knowledge of the decays of the D/sub s/ meson. I compare D/sub s/ properties to those predicted from recent comprehensive D meson decay models that are based on the better measured charmed isodoublet (D/sup 0/,D/sup +/). 12 refs., 5 figs., 2 tabs.
Date: June 1, 1989
Creator: Schindler, R.H.
Partner: UNT Libraries Government Documents Department

Physics of a high luminosity collider operated near charm and tau pair thresholds

Description: The current plans for a high luminosity e/sup +/e/sup /minus// collider between 3.0 and 4.4 GeV/c/sup 2/ are described. Such a dedicated facility (The Tau-Charm Factory), operating near tau-pair and charm thresholds would allow studies of the decay of the third generation tau-lepton and the second generation c-quark with unprecedented precision and control of systematics. The charm physics of such a facility is discussed. 24 refs., 4 figs., 7 tabs.
Date: June 1, 1989
Creator: Schindler, R.H.
Partner: UNT Libraries Government Documents Department

Charmed meson physics accessible to an L = 10/sup 33/ cm/sup /minus/2/ sec/sup /minus/1/ e/sup +/e/sup /minus// collider operating near charm threshold

Description: In this report, the potential for dedicated charmed D/sup 0/, D/sup +/ and D/sub s/ meson physics in a high-luminosity e/sup +/e/sup /minus// collider operated near charm threshold is explored. The construction of such a high-luminosity collider or Tau-Charm Factory in conjunction with a new detector whose design draws heavily on the extensive operational experience of previous detectors at SPEAR, could achieve three orders-of-magnitude improvement in sensitivity in most areas of charmed meson studies. 27 refs., 10 figs., 9 tabs.
Date: June 1, 1989
Creator: Schindler, R.H.
Partner: UNT Libraries Government Documents Department

Heavy quark spectroscopy and decay

Description: The understanding of q anti q systems containing heavy, charmed, and bottom quarks has progressed rapidly in recent years, through steady improvements in experimental techniques for production and detection of their decays. These lectures are meant to be an experimentalist's review of the subject. In the first of two lectures, the existing data on the spectroscopy of the bound c anti c and b anti b systems will be discussed. Emphasis is placed on comparisons with the theoretical models. The second lecture covers the rapidly changing subject of the decays of heavy mesons (c anti q and b anti q), and their excited states. In combination, the spectroscopy and decays of heavy quarks are shown to provide interesting insights into both the strong and electroweak interactions of the heavy quarks. 103 refs., 39 figs.
Date: January 1, 1987
Creator: Schindler, R.H.
Partner: UNT Libraries Government Documents Department

Incineration of contaminated organic solvents in a fluidized-bed calciner

Description: The reprocessing of expended reactor fuels at the Idaho Chemical Processing Plant (ICPP) generates contaminated organic solvents. An evaluation of potential management alternatives shows that several are suitable for management of contaminated solvents containing tri-butyl phosphate (TBP): the solvent could be burned in a commercially-available burner which absorbs the phosphorus on a fluidized-bed of limestone leaving a solid product for burial; the solvent could be burned in a small fluidized-bed calciner which solidifies non-radioactive feed by in-bed combustion of the contaminated solvent. The fluidized-bed absorbs the phosphate forming a solid product for burial; the solvents could be solidified with a gel or sorbant for burial if the reprocessing system were modified to reduce the solvent volume; and the contaminated solvent could be burned in an existing fluidized-bed calciner designed for solidifying high-level aqueous wastes. Burning the solvent in the existing calciner was selected for process verification because it provides an existing burner, off-gas system, and solids transfer and storage system. No additional wastes are generated. A set of four pilot-plant tests verified the absence of adverse effects from the phosphorus in the fuel when calcining simulated ICPP aqueous wastes. Essentially all of the phosphorus remained in the calcined solids with only a neglegible quantity remaining in the scrubbed off-gas. Combustion efficiency was high (93 to 96%). There were no observable adverse effects on solids in the scrubbing system, corrosion rates, or solids flowability (for retrieval). Conclusions of general applicability are: alternative technologies are available for disposal of contaminated solvents, and the use of an existing fuel-using facility, e.g., calciner or incinerator - designed for contaminated wastes will usually be cost effective.
Date: January 1, 1980
Creator: Schindler, R.E.
Partner: UNT Libraries Government Documents Department

Results on semileptonic D and D/sub s/ decays and evidence for non-D/bar D/ decays of the /psi/ (3770)

Description: This paper discusses the following topics: Observation of Cabibbo suppressed semileptonic D decays; Search for D/sub s/ semileptonic decays; and Preliminary evidence for non-D/bar D/ decays of the /psi/ (3770). 4 refs., 3 figs., 2 tabs.
Date: December 1, 1988
Creator: Schindler, R.H.
Partner: UNT Libraries Government Documents Department

Physical property parameter set for modeling ICPP aqueous wastes with ASPEN electrolyte NRTL model

Description: The aqueous waste evaporators at the Idaho Chemical Processing Plant (ICPP) are being modeled using ASPEN software. The ASPEN software calculates chemical and vapor-liquid equilibria with activity coefficients calculated using the electrolyte Non-Random Two Liquid (NRTL) model for local excess Gibbs free energies of interactions between ions and molecules in solution. The use of the electrolyte NRTL model requires the determination of empirical parameters for the excess Gibbs free energies of the interactions between species in solution. This report covers the development of a set parameters, from literature data, for the use of the electrolyte NRTL model with the major solutes in the ICPP aqueous wastes.
Date: September 1, 1996
Creator: Schindler, R.E.
Partner: UNT Libraries Government Documents Department

Emissions model of waste treatment operations at the Idaho Chemical Processing Plant

Description: An integrated model of the waste treatment systems at the Idaho Chemical Processing Plant (ICPP) was developed using a commercially-available process simulation software (ASPEN Plus) to calculate atmospheric emissions of hazardous chemicals for use in an application for an environmental permit to operate (PTO). The processes covered by the model are the Process Equipment Waste evaporator, High Level Liquid Waste evaporator, New Waste Calcining Facility and Liquid Effluent Treatment and Disposal facility. The processes are described along with the model and its assumptions. The model calculates emissions of NO{sub x}, CO, volatile acids, hazardous metals, and organic chemicals. Some calculated relative emissions are summarized and insights on building simulations are discussed.
Date: March 1, 1995
Creator: Schindler, R.E.
Partner: UNT Libraries Government Documents Department

Search for doubly cabibbo-suppressed D sup + decays

Description: Preliminary results of a search for the doubly Cabibbo-suppressed D{sup +} decays D{sup +} {yields} {Kappa}{sup +} {pi}{sup {minus}} {pi} {sup +} D{sup +} {yields} {Kappa}{sup +}{pi}{sup 0}, in the MarkIII detector at SPEAR are presented. Theoretical arguments suggest that these decays may be enhanced relative to Cabibbo-allowed D{sup +} decays. Use of hadronically tagged D{sup +}D{sup {minus}} events produced in the decay of the {psi} (3770), reduce backgrounds significantly, allowing the isolation of three candidate events in the {Kappa}{sup +}{pi}{sup +}{pi}{sup {minus}} final state and a limit on the relative decay rate of the {Kappa}{sup +}{pi}{sup 0}channel. 4 refs., 2 figs.
Date: November 1, 1990
Creator: Schindler, R.H.
Partner: UNT Libraries Government Documents Department

Grain boundary dislocations in plane matching grain boundaries

Description: Plane matching (PM) boundaries are defined as boundaries in which a single stack of planes of indices (hkl) in each crystal adjoining the boundary is either parallel, or nearly parallel, and where no other significant lattice matching exists. A search was made (by transmission electron microscopy) for possible intrinsic secondary grain boundary dislocation (GBD) arrays which might be present in such boundaries possessing a variety of deviations from the exact PM condition. (002), (220) and (420) PM boundaries of controlled geometry were prepared in gold thin film bicrystal specimens. Wide ranges of twist and tilt deviations from the exact PM orientation were introduced, and the orientation of the boundary plane was also varied for cases of fixed crystal misorientation. Arrays consisting of parallel GBDs were found in the (002) and (220) boundaries but not in the (420) boundaries. The Burgers vector of the GBDs was parallel to (hkl) with a magnitude given by the (hkl) interplanar spacing. Arrays were found in boundaries with twist deviations as large as 4/sup 0/ and tilt deviations as large as 14/sup 0/ and with a wide range of grain boundary plane orientations. The results suggest that discrete GBDs should be present in a variety of (002), (111) and (220) PM boundaries over a considerable range of misorientation which in certain cases may be as large as 20/sup 0/. Such boundaries should therefore appear rather frequently in general polycrystalline materials in agreement with the estimates of Warrington and Boon. It is pointed out that the physical basis for the stability of such GBD structures is not understood at present.
Date: August 1, 1979
Creator: Schindler, R.; Clemans, J.E. & Balluffi, R.W.
Partner: UNT Libraries Government Documents Department

The tau-charm factory: Experimental perspectives

Description: This report discusses the Tau-Charm Factory Concept; D and D{sub S} Physics at the Tau-Charm Factory; {tau} and {nu}{sub {tau}} Physics at the Tau-Charm Factory; and Charmonium, Gluonium and Light Quark Spectroscopy at the Tau-Charm Factory.
Date: September 1, 1991
Creator: Perl, M.L. & Schindler, R.H.
Partner: UNT Libraries Government Documents Department

New particle searches in e/sup +/e/sup /minus// collisions

Description: This report summarizes the results of the Study Group on New Particle Searches at e/sup +/e/sup /minus// Colliders. The work of this Group was organized by U. Nauenberg. The Group was divided into two subgroups: Low Energy Colliders (E/sub cm/ less than or equal to 200 GeV) led by R. Schindler and M. Chen, and High Energy Colliders (E/sub cm/ greater than or equal to 200 GeV) led by D. Burke. A variety of e/sup +/e/sup /minus// colliders, from 100 GeV to 2 TeV in the center-of-mass, were considered. Some of these facilities (SLC and LEP) are now under construction and will start opening in the next year or so, while the high energy colliders are quite hypothetical with no credible designs existing at this time. 3 refs., 20 figs., 6 tabs.
Date: January 1, 1989
Creator: Baltay, C.; Burke, D.; Schindler, R.; Chen, M.; Kane, G. & Nauenberg, U.
Partner: UNT Libraries Government Documents Department

Screening Level Risk Assessment for the New Waste Calcining Facility

Description: This screening level risk assessment evaluates potential adverse human health and ecological impacts resulting from continued operations of the calciner at the New Waste Calcining Facility (NWCF) at the Idaho Nuclear Technology and Engineering Center (INTEC), Idaho National Engineering and Environmental Laboratory (INEEL). The assessment was conducted in accordance with the Environmental Protection Agency (EPA) report, Guidance for Performing Screening Level Risk Analyses at Combustion Facilities Burning Hazardous Waste. This screening guidance is intended to give a conservative estimate of the potential risks to determine whether a more refined assessment is warranted. The NWCF uses a fluidized-bed combustor to solidify (calcine) liquid radioactive mixed waste from the INTEC Tank Farm facility. Calciner off volatilized metal species, trace organic compounds, and low-levels of radionuclides. Conservative stack emission rates were calculated based on maximum waste solution feed samples, conservative assumptions for off gas partitioning of metals and organics, stack gas sampling for mercury, and conservative measurements of contaminant removal (decontamination factors) in the off gas treatment system. Stack emissions were modeled using the ISC3 air dispersion model to predict maximum particulate and vapor air concentrations and ground deposition rates. Results demonstrate that NWCF emissions calculated from best-available process knowledge would result in maximum onsite and offsite health and ecological impacts that are less then EPA-established criteria for operation of a combustion facility.
Date: May 1, 1999
Creator: Abbott, M. L.; Keck, K. N.; Schindler, R. E.; VanHorn, R. L.; Hampton, N. L. & Heiser, M. B.
Partner: UNT Libraries Government Documents Department

Conclusions from the Engineering Subgroup of the SSC Liquid Argon Calorimeter Working Group

Description: The SSC Calorimeter workshop was organized to explore the feasibility of each calorimeter technology for use in a 4..pi.. detector at the SSC. The Liquid Argon Calorimeter group further subdivided into four subgroups; Hermeticity, Engineering, Module Details, and Electronics. This is the report of the Engineering Subgroup whose charge was to evaluate the cost, schedule, manpower, safety, and facilities requirements for the construction of a large liquid argon calorimeter for the SSC. 4 figs., 4 tabs.
Date: June 1, 1989
Creator: Bederede, D.; Cooper, W.; Kroon, P.; Lobkowicz, F.; Mason, I.; Mulholland, G. et al.
Partner: UNT Libraries Government Documents Department

A Novel Technique for the Production of Large Area Z-coordinate Readout Planes for the BaBar Muon System

Description: The BABAR detector, at the Stanford Linear Accelerator Center is a general purpose detector for the study of e{sup +}e{sup -} interactions at the {Upsilon}(4S) resonance. BABAR's muon detection system consists of two parts: a hexagonal barrel region and two planar endcap regions each containing 18 layers of iron ({approx} 3.6{lambda}), with resistive plate chambers within the inter-iron gaps. These chambers have suffered deterioration in performance over the past few years and are being replaced by limited streamer tube chambers in the barrel. Each layer of the system consists of a set of up to 10 streamer tube modules oriented parallel to the beamline providing the azimuthal coordinate ({Phi}) and a single ''Z-plane'' with strips oriented perpendicular the streamer tubes providing the coordinate (Z) along the beamline. The large area Z-planes (up to 12 m{sup 2}) are 1 mm thick and contain 96 strips that detect the induced charge from avalanches on the streamer tube wires. This paper reports on the novel construction technique of the Z-planes.
Date: September 30, 2005
Creator: Convery, M.R.; Kim, P.C.; /SLAC; Paar, H.P.; /UC, San Diego; Rogers, C.H. et al.
Partner: UNT Libraries Government Documents Department

Statistically meaningful data on the chemical state of ironprecipitates in processed multicrystalline silicon usingsynchrotron-based X-ray absorption spectroscopy

Description: X-ray fluorescence microscopy (mu-XRF), x-ray beam induced current (XBIC), and x-ray absorption spectromicroscopy (mu-XAS) were performed on fully-processed Bay Six cast multicrystalline silicon and aluminum-gettered AstroPower Silicon-Film(TM) sheet material. Over ten iron precipitates--predominantly of iron silicide--were identified at low lifetime regions in both materials, both at grain boundaries and intragranular defects identified by XBIC. In addition, large (micron-sized) particles containing oxidized iron and other impurities (Ca, Cr, Mn) were found in BaySix material. The smaller iron silicide precipitates were more numerous and spatially distributed than their larger oxidized iron counterparts, and thus deemed more detrimental to minority carrier diffusion length.
Date: November 8, 2004
Creator: Buonassisi, T.; Heuer, M.; Istratov, A.A.; Weber, E.R.; Cai, Z.; Lai, B. et al.
Partner: UNT Libraries Government Documents Department

RESONANCE PRODUCTION BY TWO-PHOTON INTERACTIONS AT SPEAR

Description: Two-photon interactions have been studied with the SLAC-LBL Mark II magnetic detector at SPEAR. The cross section for {eta}' production by the reaction e{sup +}e{sup -} {yields} e{sup +}e{sup -}{eta}' has been measured at beam energies from 2.0 GeV to 3.7 GeV. The radiative width {Lambda}{sub {gamma}{gamma}}({eta}') has been determined to be 5.8 {+-} 1.1 keV ({+-}20% systematic uncertainty). Upper limits on the radiative widths of the f(1270), A{sub 2}(1310) and f'(1515) tensor mesons have been determined. A search has been made for production of the E(1420) by {gamma}{gamma} collisions, but no signal is observed.
Date: June 1, 1981
Creator: Jenni, P.; Burke, D.L.; Telnov, V.; Alam, M.S.; Boyarski, A.M.; Breidenbach, M. et al.
Partner: UNT Libraries Government Documents Department

OBSERVATION OF THE {eta}{sub c} (2980) PRODUCED IN THE RADIATIVE DECAY OF THE {psi}' (3684)

Description: In a study of {psi}'(3684) radiative decays with the Mark II detector at SPEAR, we observe the decay sequence {psi}' {yields} {gamma}{eta}{sub c}(2980), with the {eta}{sub c}(2980) decaying into several completely reconstructed hadronic modes. We obtain a mass M = 2980 ± 8 MeV / c{sup 2} and a width {Gamma} < 40 MeV / c{sup 2} (90% confidence level), and present estimates of some of the decay branching ratios.
Date: July 1, 1980
Creator: Himel, T. M.; Trilling, G. H.; Abrams, G. S.; Alam, M. S.; Blocker, C. A.; Blondel, A. P. et al.
Partner: UNT Libraries Government Documents Department

Measurements of B meson decays to (omega)K* and (omega)(rho)

Description: The authors describe searches for B meson decays to the charmless vector-vector final states {omega}K* and {omega}{rho} in 89 million B{bar B} pairs produced in e{sup +}e{sup -} annihilation at {radical}s = 10.58 GeV.
Date: March 14, 2006
Creator: Aubert, B.; Cheng, C. H.; Lange, D. J.; Simani, M. C.; Wright, D. M.; Abrams, G. S. et al.
Partner: UNT Libraries Government Documents Department