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in subjects: "Particle Identification"

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The BRAHMS experiment at RHIC goals and status

The BRAHMS experiment is designed to measure semi-inclusive spectra of charged hadron over a wide range of rapidity. It will yield information on particle production, both at central rapidity and in the baryon rich fragmentation region. Examples of measures for soft as well as for hard physics are presented. The present status of BRAHMS is discussed, as well as the plans for measurements in the first year of running at RHIC.

Date: December 1, 1998

Creator: Videbaek, F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Calibration of the high resolution spectrometer barrel calorimeter at PEP

The High-Resolution Spectrometer (HRS) is a general-purpose detector for the study of high-energy electron-positron collisions. The HRS has been in data-taking operation since early 1982. This report covers the calibration of the barrel shower counter system. The barrel system consists of 40 modules placed in a circular arch having a mean radius of 2.1 m. Each module covers an azimuthal wedge of 9 degrees and has an active length of 3.0 m. There are three independent sections: (1) an inner sand… more

Date: January 1, 1983

Creator: Loos, J. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Calorimetry at 0{degree} in RHIC: Some issues in the choice of detector technology

The authors discuss briefly the case for a zero degree calorimeter at RHIC and space constraints on such a device. Two GEANT simulations of quartz fiber calorimeters are then studied and compared to the corresponding case of scintillator sampling. The authors find that the Q-cal calorimeter does provide some improvement in response uniformity near the calorimeter edge to hadronic showers (due to the filtering out of wide angle shower products). This may be an advantage when space is limited and… more

Date: May 1, 1994

Creator: Christie, B.; White, S.; Gorodetzky, P. & Lazic, D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Calorimetry in ZEUS: Lessons for the Future

The storage ring facility HERA, under construction at the DESY Laboratory, will collide 30 GeV e/sup /minus// with 820 GeV protons when the machine is first turned on in 1990. Four interaction regions being provided. Subsequently either e/sup /minus// or e beams can be used and a facility for producing longitudinal polarization of the electrons at the interaction points will be provided. Both the center-of-mass energy ( s = 314 GeV) and the momentum transfer (Q/sub max/S /approximately/ 10V GeV… more

Date: January 1, 1988

Creator: Derrick, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The Capabilities of the upgraded MIPP experiment with respect to Hypernuclear physics

We describe the state of analysis of the MIPP experiment, its plans to upgrade the experiment and the impact such an upgraded experiment will have on hypernuclear physics. The upgraded MIPP experiment is designed to measure the properties of strong interaction spectra form beams {pi}{sup {+-}}, K{sup {+-}}, and p{sup {+-}}, for momenta ranging from 1 GeV/c to 120 GeV/c. The layout of the apparatus in the data taken so far can be seen in Figure 1. The centerpiece of the experiment is the time pr… more

Date: January 1, 2012

Creator: Raja, Rajendran

Item Type: Article

Partner: UNT Libraries Government Documents Department

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CCNY collaboration with BNL in R and D for ISABELLE detectors. Technical progress report, November 1, 1980-June 10, 1981

The difference in ionization loss of particles as a function of their velocity is widely used as a technique to identify the particles. The ionization loss in gas samples an order of magnitude smaller than previously investigated was studied. In order to do this, new techniques were developed which use a longitudinal drift ionization detector and fast analog to digital conversion techniques which allow one to effectively slice a piece of track into very small samples by electronic means using a… more

Date: January 1, 1981

Creator: Lindenbaum, S. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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CCpi0 Event Reconstruction at MiniBooNE

We describe the development of a fitter to reconstruct {nu}{sub {mu}} induced Charged-Current single {pi}{sup 0} (CC{pi}{sup 0}) events in an oil Cerenkov detector (CH{sub 2}). These events are fit using a generic muon and two photon extended track hypothesis from a common event vertex. The development of ring finding and particle identification are described. Comparisons between data and Monte Carlo are presented for a few kinematic distributions.

Date: September 1, 2009

Creator: Nelson, Robert H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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CDF evidence for the top quark & B physics at Fermilab

We present the first direct evidence for the top quark with the Collider Detector at Fermilab (CDF) in a sample of {bar p}p collisions at {radical}s=1.8 TeV with an integrated luminosity of 19.3 pb{sup -1}. The recent B physics results at Fermilab from both collider and fixed target experiments are reviewed.

Date: February 1, 1997

Creator: Yao, Weiming

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The CDF-II time-of-flight detector

A Time-of-Flight (TOF) detector, based on plastic scintillator and fine-mesh photomultiplier tubes, has been added to the CDF-II experiment. Since August 2001, the TOF system has been fully instrumented and integrated into the CDF-II data acquisition system. The TOF system will provide particle identification of low momentum charged pions, kaons and protons in -collisions. With a design resolution goal of about 100 ps, separation between charged kaons and pions is expected at the 2 sigma level … more

Date: July 1, 2002

Creator: Cabera, S. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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CDF measurements of the W mass and search for the top

The derivation of the W mass value of 79.91 [plus minus] 0.39 GeV/c[sup 2] is discussed. The present limit at 91 GeV/c[sup 2] (95% C.L.) on the mass of the top quark is also presented. In the next two years of data collection, we expect to collect significantly more luminosity than in the past. We discuss prospects for the discovery of the top quark and improvements of the current measurements.

Date: October 1, 1992

Creator: Leone, S. (Istituto Nazionale di Fisica Nucleare, Pisa (Italy))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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CDF Measurements of the W Mass and Search for the Top

The derivation of the W mass value of 79.91 {plus_minus} 0.39 GeV/c{sup 2} is discussed. The present limit at 91 GeV/c{sup 2} (95% C.L.) on the mass of the top quark is also presented. In the next two years of data collection, we expect to collect significantly more luminosity than in the past. We discuss prospects for the discovery of the top quark and improvements of the current measurements.

Date: October 1, 1992

Creator: Leone, S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The CDF SVX II detector upgrade

The proposed CDF SVX II detector upgrade for secondary vertex detection during the Fermilab Tevatron Run II collider run is described. The general design and important features of this silicon vertex detector are presented. The CDF physics goals which are addressed by this detector are also given.

Date: October 1, 1993

Creator: Skarha, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The CDF Time of Flight Detector

A new Time of Flight (TOF) detector based on scintillator bars with fine-mesh photomultipliers at both ends has been in operation since 2001 in the CDF experiment. With a design resolution of 100 ps, the TOF can provide separation between K{sup +-} and {pi}{sup +-} in p{bar p} collisions at the 2{omega} level for low momentum, which enhances b flavor tagging capabilities. Because of its very fast response, the TOF is an excellent triggering device, and it is used to trigger on highly ionizing p… more

Date: January 6, 2004

Creator: al., S. Cabrera et

Item Type: Article

Partner: UNT Libraries Government Documents Department

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CDF top results in the dilepton channel

The current status of the top quark search at CDF in the dilepton channel is presented. In the 1992--1993 run (Run Ia), with 19.3 pb{sup {minus}1} collected, two e{mu} events survived all the cuts, including a two-jet cut for high mass top, with a total estimated background of 0.56{sub 0.13}{sup 0.25} events. With approximately 9 pb{sup {minus}1} of data analyzed from the 1993--1994 run (Run Ib) a new e{mu} event passing all the cuts has been detected.

Date: September 1994

Creator: Benlloch, Jose M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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CDF top results in the lepton + jets channel

Results from the 1992--1993 Tevatron run (ran IA) top search at CDF in the lepton+jets channel are reported. The jet-vertexing algorithm tags 6 events on a background of 2.3 {plus_minus} 0.3 events in the W+ {ge} 3 jets data sample, and the soft lepton analysis finds T events on a background of 3.1 {plus_minus} 0.3 events in the same data sample. Jet-vertex and soft-lepton tag correlations are described. Also given are the expected and observed number of tags in the Z+mulitjet control sample.

Date: August 1, 1994

Creator: Watts, G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The CDF top search in the multijet decay mode

A status report on the CDF top search in the multijet channel is given. After topological cuts and the requirement of a secondary vertex in the silicon microvertex detector, about 120 events remain (21.4 pb{sup {minus}1}), in which the signal to background ratio (for a nominal top mass of 160 GeV) is estimated to be 1/10. With further improvements it should be possible to improve this ratio to 1/1 while retaining good efficiency for top, which will make the multijet channel an important cross c… more

Date: January 1, 1994

Creator: Denby, B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The CDFII time-of-flight detector and impact on beauty flavor tagging

Following the successful RunI from 1992 to 1996, the CDF detector has undergone a major upgrade [1] for the RunII which begun in March 2001. The approval for the addition of a Time-of-Flight detector was granted in January 1999. The installation of the TOF detector was completed in August 2001 and its data has been included in the CDFII readout since then. The primary physics motivation for TOF is to complement and enhance the particle identification capability provided by the central drift cha… more

Date: December 3, 2002

Creator: al., C. Grozis et

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The CEBAF Large Acceptance Spectrometer (CLAS)

The CEBAF Large Acceptance Spectrometer (CLAS) is used to study photo- and electro-induced nuclear and hadronic reactions by providing efficient detection of neutral and charged particles over a good fraction of the full solid angle. A collaboration of about thirty institutions has designed, assembled, and commissioned CLAS in Hall B at the Thomas Jefferson National Accelerator Facility. The CLAS detector is based on a novel six-coil toroidal magnet which provides a largely azimuthal field dist… more

Date: January 1, 2003

Creator: Mecking, Bernhard & Collaboration, CLAS

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The central tracking detectors for D/O/

Three types of drift chambers are being constructed for the Fermilab D/O/ experiment. The construction and readout of these chambers stress good spatial resolution, good two hit separation, and dE/dx. A 106 MHz FADC system with hardware zero suppression is being constructed to readout this system. 8 refs., 12 figs., 1 tab.

Date: January 1, 1988

Creator: Clark, A.; Goozen, F.; Klopfenstein, C.; Kerth, L.T.; Loken, S.; Strovink, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Cerenkov counters at ISABELLE

Particle mass identification capability will be very important for much of the physics at ISABELLE. It will be required for studying quantum number flow in quark--quark scattering (jet and high P/sub t/ physics), hadronic decays of W's and Z's, and ''onium'' states. It will be essential for detecting and studying ''naked flavor'' states and generally required or at least very useful for most hadronic physics at ISABELLE. The large all-purpose detectors envisioned for ISABELLE require particle i… more

Date: January 1, 1978

Creator: Ashford, V.; Etkin, A.; Honma, A.; Kostoulas, I.; Lanou, R. & Watts, T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Cerenkov ring imaging detector development at SLAC

The imaging of Cerenkov light on to photosensitive detectors promises to be a powerful technique for identifying particles in colliding beam spectrometers. Toward this end two and three dimensional imaging photon detectors are being developed at SLAC. The present techniques involve photon conversion using easily ionized exotic chemicals like tetrakisdimethyl-amino-ethylene (TMAE) in a drift and amplifying gas mixture of methane and isobutane. Single photoelectrons from Cerenkov light are curren… more

Date: June 1, 1984

Creator: Williams, Stephen H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Cerenkov ring imaging detector development for SLD

Progress in the development of a time projection style photoelectron detector is reported. The development is intended to demonstrate the principles and determine specifications for a practical design of the large CRID device recently described in the SLD design report, wherein a large detector for the Stanford Linear Collider is described. The drift detector utilizes the technique of photo-ionization of Cerenkov light in tetrakis-dimethyl-amino-ethylene (TMAE) vapor at (1700 to 2200 A), and dr… more

Date: November 1, 1984

Creator: Williams, S.; Ashford, V.; Bird, F.; Leith, D.W.G.S.; Shimomura, T.; Shapiro, S. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Cerenkov ring imaging detector development: Progress report

We present recent progress on the construction and testing of the first drift boxes and single electron detectors as they come from the production line. These detectors will be used for particle identification using the Ring Imaging technique in the SLD experiment at SLAC. Various experimental results are presented, including single electron pulse height measurements as a function of gas gain, detector gating capability, uniformity of response across the wire plane, charge division performance … more

Date: October 1, 1988

Creator: Aston, D.; Bienz, T.; Bird, F.; Dasu, S.; Dunwoodie, W.; Hallewell, G. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Charged hadron production in e/sup /+//e/sup /-// annihilation at. sqrt. s = 29 GeV

We have used data from the Time Projection Chamber at the SLAC storage ring PEP to study the inclusive production of charged hadrons in e/sup /+//e/sup /-// annihilation at a center of mass energy of 29 GeV. Charged particles were identified by simultaneous dEdx and momentum measurements. We present cross sections and particle fractions for ..pi../sup/plus minus//, k/sup + -/, and p(/ovr/p//) as a function of energy, momentum, rapidity, and transverse momentum. We compare the predictions of var… more

Date: March 1, 1988

Creator: Aihara, H.; Alston-Garnjost, M.; Avery, R. E.; Barbaro-Galtieri, A.; Barker, A. R.; Barnett, B. A. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department