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in subjects: "Shower Counters"

open access

Prospects for physics at e/sup +/e/sup -/ linear colliders

The present thinking on high-energy e/sup /plus//e/sup /minus// linear colliders is reviewed, stressing those points that have consequences for detector design and physics analyses. Detector requirements are discussed. Experimental aspects of the physics that can be done at these colliders are discussed: first the general physics environment, then a standard process, W/sup /plus// W/sup /minus// detection, and finally four examples of the discovery potential of these colliders /emdash/ heavy qu… more

Date: March 1, 1988

Creator: Feldman, G. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The limited streamer tubes system for the SLD warm iron calorimeter

The SLD detector at the Stanford Linear Accelerator Center is a general purpose device for studying e{sup +}{epsilon}{sup {minus}} interaction at the Z{sup 0}. The SLD calorimeter system consists of two parts: a lead Liquid Argon Calorimeter (LAC) with both electromagnetic (22 radiation lengths) and hadronic sections (2.8 absorption lengths) housed inside the coil, and the Warm Ion limited streamer tubes Calorimeter (WIC) outside the coil which uses as radiator the iron of the flux return for t… more

Date: January 1, 1992

Creator: Benvenuti, A. C.; Camanzi, B.; Piemontese, L.; Zucchelli, P.; Calcaterra, A.; De Sangro, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Search for the neutrinoless muon decay. mu. /sup +/. -->. e/sup +/. gamma

Separate muon, electron, and tau numbers are conserved in the minimal standard model of electroweak interactions with massless neutrinos. However, in many extensions to the standard model, separate lepton numbers are not expected to be conserved quantities. A new search for muon number non-conserving processes has been undertaken at the Los Alamos Meson Physics Facility (LAMPF), specifically to look for three neutrinoless decay modes of the muon. The search for the decay of a muon to an electro… more

Date: July 1, 1985

Creator: Wilson, S.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Simulation of hanging file experiments with CALOR89

This note presents the comparison of CALOR89 simulation with the hanging file'' test measurements conducted at Fermilab during the period of Sep 91--Jan 92. The purpose of this study is to benchmark CALOR89 code against the experimental data to enhance its reliability and predictive power. Seven hanging file configurations were simulated. The measured values of e/{pi} ratio (the ratio of electron to pion signal at the same energy), hadronic and electromagnetic resolutions were compared with the… more

Date: January 1, 1992

Creator: Job, P.K.; Price, L.E.; Proudfoot, J. (Argonne National Lab., IL (United States). High Energy Physics Div.); Handler, T. (Tennessee Univ., Knoxville, TN (United States)) & Gabriel, T.A. (Oak Ridge National Lab., TN (United States))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Pseudorapidity distributions and correlations in central sup 16 O interactions at 200 A GeV

Whether or not adequate energy densities for a transition to the Quark-Gluon Plasma (QGP) phase are possible in {sup 16}O and {sup 32}S induced reactions is still an open question. Before unambiguous signals can be identified it is necessary to understand the background upon which the expected QGP signatures can be sought. An important aim of early experiments in this new energy density regime is thus to understand the process of hadronization in a nuclear environment. In any discussion of high… more

Date: January 1, 1988

Creator: Wilkes, R. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Proposal to assemble a high resolution-electron sensitive-energy flow calorimeter in the NEULAND spectrometer

A ..gamma.. catcher and a liquid scintillation calorimeter module in a simple configuration that is well suited to the investigation of several different neutrino induced processes are described. The variety of neutrino beams now available at Fermilab and synchrotron intensity and energy together with the high resolution calorimeter allow a multiplicity of experiments to be carried out with a single detector configuration.

Date: January 1, 1977

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A many particle-tracking detector with drift planes and segmented cathode readout

We describe the design and performance of a detector system for tracking charged particles in an environment of high track density and rates up to 1 MHz. The system operates in the forward spectrometer of the BNL Heavy Ion experiment E814 and uses principles of general interest in high rate, high multiplicity applications such as at RHIC or SSC. We require our system to perform over a large dynamic range, detecting singly charged particles as well as fully ionized relativistic {sup 28}Si. Resul… more

Date: January 1, 1990

Creator: Fischer, J.; Lissauer, D.; Ludlam, T.; Makowiecki, D.; O'Brien, E.; Radeka, V. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Pseudorapidity densities and fluctuations in central sup 32 S interactions at 200A GeV

Observations of heavy ion interactions at the highest available accelerator energies provide essential information for the analysis and interpretation of cosmic ray interactions. We report on an experiment in which emulsion chamber detectors were exposed to beams of 200A GeV {sup 32}S ions at the CERN SPS. We present statistical features of pseudorapidity distributions from central collisions in the experimental sample and compare them with the predictions from the Lund Model (FRITIOF) which co… more

Date: January 1, 1990

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Indiana University High Energy Physics, Task A

This report discusses research in High Energy Physics under the following experiments: Meson spectroscopy at BNL; dimuon production at FNAL; the DO collider experiment at FNAL; the Mark II experiment at SLC and PEP; the OPAL experiment at CERN; and the superconducting supercollider.

Date: January 1, 1991

Creator: Brabson, B.; Crittenden, R.; Dzierba, A.; Hanson, G.; Martin, H.; Marshall, T. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Particle identification for beauty physics

We look briefly at the requirements for particle identification for possible beauty experiments at the Tevatron, both in the fixed target and the collider mode. Techniques presently in use in high energy physics experiments, and under development, should make sensitive experiments feasible. However, in all cases the present state of the art must be advanced to meet the necessary requirements for segmentation andor rate capability. The most fundamentally difficult challenges appear to be the eff… more

Date: January 1, 1987

Creator: Ludlam, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Lead-Glass Wall addition to the Spear Mark I Magnetic Detector

A ''Lead-Glass Wall,'' consisting of 318 lead-glass Cherenkov shower counters and three wire spark chambers, has been added to one octant of the SPEAR Mark I Magnetic Detector. The wall covers a solid angle of approximately 6 percent of 4..pi.. steradians and has been used to identify and measure the energies of electrons and photons produced in electron-positron collisions. The design, calibration, gain-monitoring, and performance of the system are described.

Date: October 1, 1977

Creator: Feller, J. M.; Barbaro-Galtieri, A. & Dorfan, J. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Physics at hadron colliders: Experimental view

The physics of the hadron-hadron collider experiment is considered from an experimental point of view. The problems encountered in determination of how well the standard model describes collider results are discussed. 53 refs., 58 figs.

Date: August 1, 1987

Creator: Siegrist, J.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Small Angle Physics at CDF: A Progress Report

In 1989 CDF collected data in special high beta runs with a trigger selecting elastic and inelastic events in order to measure the total cross section ({sigma}{sub tot}) and the differential elastic cross section (d{sigma}{sub el}/dt). Data were taken at cms energies of 300, 540, 1000 and 1800 GeV. A double arm magnetic spectrometer located along the beam pipe tags the particles scattered at very small angles and tracking detectors surrounding the interaction point reveal particles produced at … more

Date: December 16, 1989

Creator: Paoletti, Riccardo

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

(High energy physics)

An intense analysis effort on the data we obtained in a seven month run on E704 last year has produced a flood of new results on polarization effects in particle production at 200 GeV/c. We are fortunate to be able to report in detail on those results. Our other Fermilab experiment, E683 (photoproduction of jets) has been delayed an unbelievable amount of time by Fermilab schedule slippages. It was scheduled and ready for beam two years ago As this report is being written, we have been running … more

Date: September 1, 1991

Creator: Bonner, B. E. & Roberts Jr., J. B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Personal extrapolation of CDF test beam use to the SSC

The author's personal experience in test beam usage at CDF is used to predict SSC needs at the point of turn-on. It is concluded that the test beam demand will reflect the scale of effort involved in SSC detectors rather than the total number of them. Provision for later expansion is recommended. It is also recommended that the test beam facilities, as well as detector electronics, should reflect the available dynamic range; particularly, a single high energy beam derived from the SSC could be … more

Date: June 23, 1986

Creator: Nodulman, L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Finite element analysis of the SDC barrel and endcap calorimeters

In designing the SCD barrel and endcap calorimeters, the inter-module connecting forces must be known in order to determine the required size and number of connecting links between modules, and in order to understand how individual modules will be affected by these forces when assembled to form a full barrel and endcap. The connecting forces were found by analyzing three-dimensional Finite Element Models of both the barrel and endcap. This paper is divided into two parts, the first part will de… more

Date: March 11, 1992

Creator: Guarino, V.; Hill, N. & Nasiakta, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Open and hidden charm muoproduction. [209 GeV]

New results are presented on open and hidden charm and bottom production by 209-GeV muons interacting in a magnetized steel calorimeter. The upper limit on the production of T states by muons is sigma(..mu..N ..-->.. ..mu..UPSILONX)B(UPSILON ..-->.. ..mu mu..) < 22 x 10/sup -39/ cm/sup 2/ (90% confidence level). The distributions of elastically produced psi's are consistent with s-channel helicity conservation (SCHC) and disagree with psi dominance. From analysis of dimuon final states the cros… more

Date: September 1, 1980

Creator: Clark, A.R.; Johnson, K.J. & Kerth, L.T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Outlook for studies of gamma-gamma collisions at PEP

A preview of the two-photon physics that can be expected to result from the initial PEP program is presented. The experimental detectors are discussed with emphasis placed on their capabilities and limitations to do studies of gamma-gamma interactions. 7 figures, 1 table.

Date: June 1, 1980

Creator: Burke, D.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Uranium scintillator calorimeter at the CERN ISR

The design, Monte Carlo studies and test beam results of a uranium/scintillator calorimeter to be installed in the Intersecting Storage Ring (ISR) at CERN are described. In its final stage the calorimeter will cover the full azimuth over a polar region of 45/sup 0/ < theta < 135/sup 0/. The full calorimeter is built in a modular way from 128 stacks, with each stack internally subdivided into six cells of 20 x 20 cm/sup 2/ cross section. The readout is by wavelength shifting (WLS) plates w… more

Date: January 1, 1980

Creator: Gordon, H; Killian, T & Ludlam, T

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Proposal to the Department of Energy for participation in the UA1 experiment

This proposal is to the Department of Energy for 501.6K dollars (349.6K operations and 152K equipment) for continued participation in the UA1 experiment on proton-antiproton collisions. The UA1 experiment is the study of high-energy proton-antiproton collisions in the Super-Proton-synchrotron (SPS) Collider at CERN. A major upgrade of the UA1 detector is in progress for operation with the upgraded antiproton source (ACOL). The US groups have played an increasingly prominent role in UA1 during t… more

Date: February 1, 1988

Creator: Rohlf, J.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Mark III results from SPEAR

First results from the MARK III detector at SPEAR are presented based on 2.7 million J/psi decays. The eta/sub c/ is observed in three modes, J/psi ..-->.. ..gamma..eta/sub c/, (eta/sub c/ ..-->.. rho anti rho, eta..pi../sup +/..pi../sup -/, and phi phi). Using the phi phi mode, the eta/sub c/ spin-parity is determined to be 0/sup -/. The known radiative J/psi decays J/psi ..-->.. ..gamma..f(f ..-->.. ..pi../sup +/..pi../sup -/), ..gamma..eta'(eta' ..-->.. ..gamma..rho/sup 0/, eta..pi../sup +/.… more

Date: November 1, 1983

Creator: Toki, W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A first simulation study of the barrel-endcap transition region in a calorimeter of the scintillator tile design

We have made a first study of the calorimetric response to 10 GeV/c charged pions in the transition region between barrel and endcap for the scintillator-tile design pursued at Argonne National Laboratory using the simulation program ANLSIM. For (very nearly) projective tower orientations in the barrel, the crack appears deep within a narrow angular range, causing a loss of the response in that region up to 40%. Pointing the towers onto the beam axis 35 cm or more away from the nominal-interact… more

Date: August 24, 1990

Creator: Proudfoot, J. & Trost, H. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Report of the Intermediate-)ital p)/sub Perpendicular/ Detector Group: A Beauty Spectrometer for the SSC (Superconducting Super Collider)

A ''Beauty Spectrometer'' has been designed for studies of B physics at the SSC. The ultimate goal is a definitive measurement of CP violation in the B system. The spectrometer consists of two stages and occupies one side of an intermediate-luminosity interaction region. An upstream, or intermediate, stage extends from the interaction point to 14 m and covers the angular region from 57 mrad (3.3 degree) to 350 mrad (20 degree). The forward stage extends to 77 m and to angles down to 5.7 mrad. T… more

Date: July 1, 1987

Creator: Foley, K. J.; Buchanan, C. D.; Morrison, R. J.; McHugh, S. W.; Witherell, M. S.; Atac, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Elementary Particle Interactions

This report discusses: Data analysis of Fermilab E-745 and Fermilab E-782 neutrino experiments; light quark meson spectroscopy; L-3 detector; SLD detector; and SSC detector research and development.

Date: October 1, 1991

Creator: Bugg, W. M.; Condo, G. T.; Handler, T.; Hart, E. L.; Read, K.; Ward, B. F. L. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department