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Resonances in the [Sigma]NN system

Description: We first review certain unique aspects of few-body [Alpha]- hypernuclei and then explore the physics of [summation] threshold in few-body elastic scattering and reactions. In particular, we discuss a predicted enhancement in the [Alpha]d cross section near the [summation]NN threshold in terms of poles in the [Tau]=0YNN amplitude. A brief discussion of anticipated poles in the [Tau]=1 amplitudes is also given.
Date: January 1, 1993
Creator: Gibson, B.F. (Los Alamos National Lab., NM (United States)) & Afnan, I.R. (Flinders Univ. of South Australia, Bedford Park, SA (Australia). School of Physical Sciences)
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Partner: UNT Libraries Government Documents Department
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Studies of relativistic heavy ion collisions

Description: We expect to complete the observations of lepton pairs with incident protons on proton and deuteron targets. The early results indicate an important fraction due to processes other than bremsstrahlung. Further high statistic runs on heavier targets (Ca on Ca) are scheduled for 1992 and possible runs for heavier ions. We expect to participate in the running and analysis for these experiments and help prepare for upgrades of the DLS system. The Hopkins group is an active member of a collaboration… more
Date: August 1, 1991
Creator: Madansky, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Fermilab Polarized Beam Facility

Description: A description of the Fermilab 200-GeV/c polarized beam is presented, including the production, transport, and spin rotation of the polarized protons and antiprotons. The momentum and polarization of each beam particle is measured by a beam-tagging system. Verification of the beam polarization and of the beam-tagging method is given by two polarimeters. A brief summary of the E-704 experimental program using the polarized beam is also presented. 7 refs., 7 figs.
Date: January 1, 1990
Creator: Grosnick, D. P.
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Partner: UNT Libraries Government Documents Department
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A measurement of strangeness production in 200 GeV/C/A /sup 32/S and /sup 1/p-nucleus interactions using the NA36 TPC

Description: Results from the NA36 experiment obtained with the /sup 32/S beam at the CERN SPS during the 1987 run are presented. Production of lambda particles by proton and /sup 32/S beams was studied. 8 figs.
Date: January 1, 1989
Creator: Greiner, D.; Anderssen, E.; Barnes, P.D.; Blaes, R.; Braun, H.; Brom, J. et al.
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Partner: UNT Libraries Government Documents Department
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K$sup -$p $Yields$ $Sigma$$sup 0$$pi$$sup 0$ cross section between 1575 and 1710-MeV cm energy range with detection of gammas

Description: From conference on baryon resonances; West Lafayette, Indiana, USA (20 Apr 1973). A study was made, with good gamma detection, of the individual channels that contribute to the reactions K/sup -/p yields LAMBDA neutrals in the K/sup -/ momentum range from 525 to 820 MeV/c. The SIGMA /sup o/ pi /sup o/ cross se ction is considered which is difficult to obtain without gamma detection (e.g. in a H/sub 2/ bubble chamber). Only events with all decay gammas detected are used for analysis. The results… more
Date: January 1, 1973
Creator: Chu, R.Y.L.; London, G.W. & Yu, Y.P.
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Partner: UNT Libraries Government Documents Department
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Baryon production at PEP

Description: Measurements of inclusive ..lambda.. + anti ..lambda.. production for 1.0 less than or equal to p less than or equal to 10.0 GeV/c and p + anti p production for 0.4 less than or equal to p less than or equal to 2.0 GeV/c show significant baryon production in e/sup +/e/sup -/ annihilation at E/sub cm/ = 29 GeV. ..lambda.. + anti ..lambda.. production represents 0.2 ..lambda..'s or anti ..lambda..'s per PEP event while the observed p + anti p production implies all baryon-antibaryon pair producti… more
Date: September 1, 1981
Creator: Goldhaber, G. & Weiss, J.M.
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Partner: UNT Libraries Government Documents Department
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Production of strange clusters in relativistic heavy ion collisions

Description: We address a number of issues related to the production of strangeness in high energy heavy ion collisions, including the possibility that stable states of multi-strange hyperonic or quark matter might exist, and the prospects that such objects may be created and detected in the laboratory. We make use of events generated by the cascade code ARC to estimate the rapidity distribution dN/dy of strange clusters produced in Si+Au and Au+Au collisions at AGS energies. These calculations are performe… more
Date: February 1, 1993
Creator: Dover, C. B.; Baltz, A. J.; Pang, Yang; Schlagel, T. J. & Kahana, S. H.
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Partner: UNT Libraries Government Documents Department
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Quark gluon plasma: Overview and experimental results from E-735

Description: A brief review of the phenomenology associated with the effort to produce and observe quark-gluon plasma in particle collisions is presented. E-735 has taken data during the 1987 Tevatron-Collider run at /square root/s = 1.8 TeV in pursuit of this goal. Results in the correlation of < p/sub t/ > with multiplicity for charged particles and p/sub t/ distributions for ..lambda../sup o/ and /bar Lambda//sup o/ are presented. 32 refs., 10 figs., 2 tabs.
Date: December 14, 1988
Creator: Turkot, F.; Alexopoulos, T.; Allen, C.; Anderson, E.W.; Areti, H.; Banerjee, S. et al.
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Partner: UNT Libraries Government Documents Department
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Hyperon and hypernuclear physics with intense beams

Description: A brief examination of progress in the study of hypernuclear physics and the hyperon-nucleon interaction is presented. The use of ..lambda..-hypernuclei in the study of conventional (nonstrange) nuclei is explored. The status of the hyperon-nucleon force problem is reviewed. Anecdotal results are discussed for baryon numbers 4 and 13. ..sigma..-hypernuclei are discussed. Production of S = -2 hypernuclei is mentioned.
Date: January 1, 1983
Creator: Gibson, B. F.
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Partner: UNT Libraries Government Documents Department
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V sup 0 Production with 14. 5 GeV/c Silicon Beams

Description: This talk deals with {Lambda}, K{sub s}{sup 0} and {bar {Lambda}} production with 14.5 GeV/c Silicon beams. Why study {Lambda}{sup 0} production Because the study of strangeness is an important part of the search for Quark Gluon Plasma (QGP). Many models predict an enhancement of strangeness in a QGP as compared to the amount of strangeness produced in a superposition of nucleon-nucleon interactions. The amount of enhancement varies from model to model. Even if no QGP is detected at AGS energie… more
Date: March 26, 1990
Creator: Bonner, B. E.; Buchanan, J. A.; Chiou, C. N.; Clement, J. M.; Corcoran, M. D.; Kruk, J. W. et al.
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Partner: UNT Libraries Government Documents Department
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Polarization in inclusive lambda production

Description: At high energies the reaction p + N ..-->.. ..lambda../sup 0/ + X yields ..lambda../sup 0/s which are strongly polarized. The behavior of this polarization should give information about quark production mechanisms. The inclusive ..lambda../sup 0/ polarization is also compared with anti ..lambda../sup 0/, and proton polarization in the fragmentation region of the incident proton at Fermilab energies.
Date: January 1, 1981
Creator: Heller, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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lambda. production in e/sup +/e/sup -/ annihilations at 29 GeV

Description: This paper presents measurements of the inclusive production cross sections of ..lambda.. baryons in e/sup +/e/sup -/ annihilations at ..sqrt..s = 29 GeV. The data sample corresponds to an integrated luminosity of 256 pb/sup -1/ collected with the High Resolution Spectrometer at PEP. Comparisons are made to the predictions of the Lund model. The data are well described using a strange diquark suppression parameter, (us/ud)/(s/d), of 0.89 +- 0.10/sub -0.16//sup +0.56/, and the measured ..lambda.… more
Date: May 1, 1986
Creator: Abachi, S.; Baringer, P.; Beltrami, I.; Bylsma, B.G.; DeBonte, R.; Koltick, D. et al.
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Partner: UNT Libraries Government Documents Department
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Asymmetry in the angular distribution of inclusive A baryons from e/sup +/e/sup -/ annihilations at. sqrt. s = 29 GeV

Description: The forward-backward asymmetry A expected from the ..gamma.. - Z/sup 0/ interference term in the process e/sup +/e/sup -/ ..-->.. q anti q is observed in the lab production angular distribution of high momentum A baryons. The data were collected with the High Resolution Spectrometer at PEP and an integrated luminosity of 256 pb/sup -1/ at ..sqrt..s = 29 GeV was used in the analysis. The asymmetry is seen to increase with the fractional energy z = 2E/..sqrt..s of the A due to the decreasing pres… more
Date: May 1986
Creator: Abachi, S.; Baringer, P.; Beltrami, I.; Bylsma, B. G.; DeBonte, R.; Koltick, D. et al.
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Partner: UNT Libraries Government Documents Department
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Hyperon polarization: An experimental overview

Description: The fact that inclusively produced hyperons are produced with significant polarization was first discovered at Fermilab about seventeen years ago. This and subsequent experiments showed that [Lambda][degree] were produced polarized while [bar [Lambda] [degree]] had no polarization in the same kinematical region. This set the stage for many experiments which showed that most hyperons are produced polarized. Recent Fermilab experiments have showed that this phenomena is even more complex than pre… more
Date: December 1, 1992
Creator: Lach, J.
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Partner: UNT Libraries Government Documents Department
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Polarization in inclusive production at Brookhaven

Description: At Brookhaven, ..lambda..'s are produced polarized in p-p interactions perpendicular to a horizontal production plane defined by proton-unit vector x ..lambda..-unit vector with their spins pointing down roughly twice as often as up, for a 1 GeV/c transverse ..lambda.. momentum. Such a large effect must indicate a simplicity in the underlying dynamics of particle production, even at low transverse momentum. Four BNL experiments are discussed in the context of experiments done at other energies … more
Date: January 1, 1980
Creator: Bunce, G.
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Partner: UNT Libraries Government Documents Department
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Search for the U(3. 1)-- anti. Lambda. p. pi. 's from anti p p interactions at 8 GeV/c

Description: A search for the U(3.1) resonance decaying into {anti {lambda}}p{pi}'s final states has been performed with negative results. The cross section upper limits are between 10 and 25 nanobarns. These cross sections are one or two order of magnitude lower than expected from previous results. Mass spectra of various final states are presented. 7 refs., 4 figs., 1 tab.
Date: January 1, 1990
Creator: Boehnlein, A.; Boehnlein, D.; Goldman, J. H.; Hagopian, V. (Florida State Univ., Tallahassee, FL (USA)); Chung, S. U.; Fernow, R. et al.
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Partner: UNT Libraries Government Documents Department
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Search for the H particle: Its production and weak decay

Description: Jaffe has suggested that a six-quark state with the flavor content of two-lambda hyperons with all spins coupled to zero, the H particle, may be bound against strong decay. This particle has become the object of extensive discussion in the literature and of several experimental searches. We report here the present status of an investigation of the reaction: ({Xi}{minus},d){sub atom}{yields} H + n in experiment E-813 at the BNL-AGS and describe plans for future running in 1992.
Date: January 1, 1991
Creator: Barnes, P.D.
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Partner: UNT Libraries Government Documents Department
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Studies of particle interactions in bubble chamber, spark chambers and counter experiments. Annual progress report

Description: During the past six years we have carried out and planned experiments which predominantly studied the production and decay of particles containing charmed quarks. A series of photoproduction and neutron production experiments started with the very early observation of the production of J/psi by neutrons and by photons at Fermilab. From subsequent experiments using these neutral beams and the basic detecting system, we have reported results on the photoproduction of the ..lambda../sub c/ charmed… more
Date: July 1, 1983
Creator: Holloway, L.E.; O'Halloran, T.A. Jr. & Simmons, R.O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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