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THE OUTLOOK IN HYPERNUCLEAR PHYSICS

Description: Information on the properties of the nuclear interactions of hyperons, weak interactions of the hyperon ( LAMBDA ), and properties of nuclei that could be obtained by studying hypernuclei is discussed. Experiments that should be able to give relevant information in the near future are considered. (D.C.W.)
Date: January 1, 1963
Creator: Dalitz, R H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Double hypernuclei or H particles?

Description: We will begin with the H particle, stranglets and strange matter since these proposed objects are a strong motivation for studying hypernuclei containing two strange quarks. The data on {Lambda}{Lambda} and {Xi} hypernuclei will then be reviewed, as well as experiments in progress or scheduled. Many have contributed to the work that will be discussed, which took place primarily at KEK and BNL. At this time of transition, and anticipation of new experimental results and facilities, we take time … more
Date: December 31, 1996
Creator: May, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Do narrow {Sigma}-hypernuclear states exist?

Description: Reports of narrow states in {Sigma}-hypernucleus production have appeared from time to time. The present experiment is a repeat of the first and seemingly most definitive such experiment, that on a target of {sup 9}Be, but with much better statistics. No narrow states were observed.
Date: December 31, 1995
Creator: Chrien, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A production in Au-Au collisions at the AGS

Description: The results of a measurement of production in Au-Au collisions at 11.6 A GeV/c by Experiment 891 at the Brookhaven AGS are presented. The measurements cover the rapidity region of 2.0 to 3.2 and transverse momenta of 0.0 to 1.4 GeV/c. The results are compared with similar measurements of Si-Si interactions and the predictions of ARC and RQMD models.
Date: December 31, 1996
Creator: Saulys, A.C.; Eiseman, S.E. & Foley, K.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Strange particle production and s-quark asymmetry

Description: Using hadronic Z{sup 0} decays recorded by the SLD experiment at SLAC, we have studied the production of strange particles as a function of momentum. A high-purity sample of K{sup {+-}} was tagged using Cherenkov Ring Imaging Detector (CRID). The {phi}, {Lambda} and K{sub s} were reconstructed in the K{sup +}K{sup -}, p-{pi} and {pi}{sup +}{pi}{sup -} modes respectively, and CRID identification of K{sup {+-}} and p was used to obtain pure samples of {phi} and {Lambda}. We have used the high ele… more
Date: August 1, 1996
Creator: Narita, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Strong and Weak Interactions of Bound a-Particles

Description: Calculations on the S-wave LAMBDA -N and LAMBDA - LAMBDA interactions, binding energies for the p-shell hypernuclei, and the mesic decay and nonmesonic de-excitation of the A-particle are discussed. The theory behind the calculations, as well as the results and their interpretation, are considered. (D.C.W.)
Date: January 1, 1963
Creator: Dalitz, R. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Transversely Polarized L Production.

Description: Transversely polarized {Lambda} production in hard scattering processes is discussed in terms of a leading twist T-odd fragmentation function which describes the fragmentation of an unpolarized quark into a transversely polarized {Lambda}. We focus on the properties of this function and its relevance for the RHIC and HERMES experiments.
Date: May 22, 2000
Creator: BORER, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hadron production in light and heavy, quark and antiquark jets

Description: The authors review four hadronization studies performed by the SLD experiment at SLAC, involving separation of light (Z{sup 0} {r_arrow} u{anti u}, d{anti d}, s{anti s}), c, and b flavors using precision vertexing, and separation of q- and {anti q}-jets using the highly polarized SLC electron beam. They measured the differences between the average charged multiplicities in Z{sup 0} {r_arrow} light, {r_arrow} c{anti c}, and {r_arrow}b{anti b} events, and found that the results were consistent wi… more
Date: August 1, 1996
Creator: Baird, Kenneth G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Strange particle production in hadronic Z{sup 0} decays

Description: A study has been made of neutral strange baryons and pseudoscalar mesons produced in hadronic decays of the weak gauge boson V. The experiment was performed at the Stanford Linear Accelerator Center, which has the unique capability of colliding highly polarized electrons with unpolarized positrons. Overall production rates and spectra of the K{sup 0} and the {Lambda}{sup 0} (+{Lambda}{sup 0}) were measured and compared with other experiments as well as with Quantum Chromodynamics calculations. … more
Date: April 1, 1996
Creator: Baird, K.G. III
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Lambda Lambda interaction and the reaction Xi plus deuteron goes to neutron plus Lambda plus Lambda{dagger}

Description: Interest in the {Lambda}{Lambda} interaction is partly due to the presence of quark-model predictions for an S = {minus}2 dibaryon, and partly to the interest in the role of the coupling between the {Lambda}{Lambda} and {Xi}{Nu} channels in {Lambda}{Lambda} hypernuclei. This latter effect is expected to be substantially more important than the coupling of the {Nu}{Nu} to the {Nu}{Delta} channel in the S = 0 sector, since the difference in threshold between the {Lambda}{Lambda} and {Xi}{Nu} is o… more
Date: July 1, 1997
Creator: Carr, S. B.; Afnan, I. R. & Gibson, B. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Associated {Lambda} production at Jefferson Lab

Description: The {sup 1}H(e, e{prime}K{sup +}){Lambda} and {sup 1}H(e, e{prime}K{sup +}){Sigma}{sup 0} reactions were studied as a function of the squared four-momentum-transfer, Q{sup 2}, and the virtual photon polarization, {var_epsilon}, thus enabling the separation of the longitudinal and transverse parts of the cross section. The existence of a sensibly large longitudinal component for the {sup 1}H(e, e{prime}K{sup +}){Lambda} reaction seems to be sustained by these data.
Date: December 31, 1997
Creator: Niculescu, G.; Baker, O. K.; Avery, S. & Collaboration, E93018
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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L Polarization in Unpolarized Hadron Reactions.

Description: The transverse polarization observed in the inclusive production of {Lambda} hyperons in the high energy collisions of unpolarized hadrons is tackled by considering a new set of spin and {kappa}{perpendicular} dependent quark fragmentation functions. Simple phenomenological expressions for these new ''polarizing fragmentation functions'' are obtained by a fit of the data on {Lambda}'s and {bar {Lambda}}'s produced in p - N processes.
Date: April 23, 2001
Creator: Anselmino, M.; Boer, D.; Dalesio, U. & Murgia, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Quark Model of λλ Production in PP Interactions

Description: A quark model which includes both scalar and vector contributions to the reaction mechanism (SV quark model) is used in a DWBA calculation of {anti {Lambda}}{Lambda} production in {bar p}p interactions. Total and differential cross-sections, polarizations, depolarizations, and spin-correlation coefficients are computed for laboratory momenta from threshold to 1695 MeV/c. The free parameters of the calculation are the scalar and vector strengths, a quark cluster size parameter, and the parameter… more
Date: December 31, 1993
Creator: Alberg, M. A.; Henley, E. M.; Wilets, L. & Kunz, P. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Lambda {sup 0} polarization in 800 GeV/c pp {r_arrow} p{sub f} ({Lambda}{sup 0} K{sup +})

Description: The authors report preliminary results from a study of {Lambda}{sup 0} polarization in the exclusive reaction pp {r_arrow} p{sub f} ({Lambda}{sup 0} K{sup +}) at 800 GeV/c. These data are a part of the 5 x 10{sup 9} diffractive event sample collected by Fermilab E690. They observe a large dependence of the polarization on the {Lambda}{sup 0} K{sup +} invariant mass. This observation confirms the result of the CERN ISR R608 experiment and extends the range over which the effect is observed.
Date: April 18, 2000
Creator: al., J. Felix et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Masses and branching fractions at CDF

Description: The authors present a collection of new results on b-meson and {Lambda}{sub b} masses and branching fractions measured at CDF. They have improved the measurement of the {Lambda}{sub b} and B{sub s} mass and they have measured the branching fractions of B{sub s} {yields} D{sub s}{pi}, {Lambda}{sub b} {yields} {Lambda}{sub c}{pi} and B{sub u} {yields} {Phi}K{sup {+-}}.
Date: October 30, 2003
Creator: D'Auria, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent results and directions in hypernuclear and Kaon physics

Description: This paper presents recent data and future plans for experiments at Brookhaven National Laboratory on hypernuclei and related topics. It will discuss experiment which put a single strange quark in the nucleus and an experiment to produce nuclei containing two strange quarks ({Lambda}{Lambda} hypernuclei).
Date: December 1, 1993
Creator: May, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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{Lambda} production in AuAu collisions at 11.6 GeV/c

Description: I present the first measurement at AGS energies of the rapidity and transverse mass distributions for A production with Au beam on Au target. The measurements cover the rapidity region of 2.0 to 3.2 and transverse momenta of 0.0 to 1.4 GeV/c. The results are compared with the predictions of two models.
Date: December 31, 1996
Creator: Foley, K.J. & Collaboration, E891
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Structure of the Weak Interaction $lambda$ + N $Yields$ N + N

Description: Empirical evidence on the nonmesic decay of LAMBDA hypernuclei is analyzed in terms of the spin and isospin dependence of the weak interactions A + p yields n + p and LAMBDA + n yields n + n. The nonmesic decay rates for / sub LAMBDA /He/sup 4/ and /sub LAMBDA /H/sup 4/ were obtained by treating the A de-excitation by different nucleons as incoherent and assuming the validity of the DELTA I = 1/2 selection rule for these interactions. The ratios of nonmesic to pi /sup -/ decay modes and of the … more
Date: May 1, 1963
Creator: Block, M. M. & Dalitz, R. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Production of {pi}{sup {plus_minus}}, K{sup {plus_minus}}, p, K{sup 0}{sub s}, {Lambda}{sup 0}, K{sup *0} and {phi} in Hadronic Z{sup 0} Decays

Description: Production rates and momentum distributions have been measured for {pi}{sup {+-}}, K{sup {+-}}, p, K{sup 0}{sub s}, {Lambda}{sup 0}, K{sup *0} and {phi} in 150,000 hadronic Z{sup 0} decays recorded by the SLD detector at the SLD collider at SLAC. The analysis uses the SLD Cerenkov Ring Imaging Detector (CRID) for clean and efficient identification of charged tracks and significant background reduction. In addition, K{sup *0} production has been studied in quark and anti-quark jet samples, which… more
Date: August 1, 1996
Creator: Dima, Mihai
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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H{sub 0} candidates from the decays {Sigma}{sup {minus}}p and {Lambda}p{pi}{sup {minus}}, produced in heavy ion collisions Si beam on Pb target

Description: There is considerable interest in searching for strange quark matter (strangelets). The lowest strangelet state is thought to be a six quark dibaryon singlet spin zero state called the H{sub 0} predicted by R.L. Jaffe. The authors present H{sub 0} candidate events, where H{sub 0}(2210) is observed through the weak decay modes {Sigma}{sup {minus}}p and {Lambda}p{pi}{sup {minus}}, produced in central heavy ion collisions with 14.6 x A Gev/c Si beam on Pb target. The lifetime is consistent with {a… more
Date: December 1, 1997
Creator: Longacre, R. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Observation of the decay B0bar -> LambdaC antiproton pi0

Description: In a sample of 467 million B{bar B} pairs collected with the BABAR detector at the PEP-II collider at SLAC we have observed the decay {bar B}{sup 0} {yields} {Lambda}{sub c}{sup +}{bar p}{pi}{sup 0} and measured the branching fraction to be (1.94 {+-} 0.17 {+-} 0.14 {+-} 0.50) x 10{sup -4}, where the uncertainties are statistical, systematic, and the uncertainty on the {Lambda}{sub c}{sup +} {yields} pK{sup -}{pi}{sup +} branching fraction, respectively. We determine an upper limit of 1.5 x 10{… more
Date: August 26, 2010
Creator: Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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