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Measurements of Non-Leptonic Weak Decays of Lambda Hypernuclei

Description: Aspects of recent measurements of the mesonic and non-mesonic partial decay rates of {sub {Lambda}}{sup 5}He, and {sub {Lambda}}{sup 12}C are discussed. We comment on what the experiments tell us about the spin-isospin structure of {Delta}S=1 weak interaction in the nuclear environment. 14 refs., 1 fig.
Date: January 1, 1991
Creator: Schumacher, Reinhard A.
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Partner: UNT Libraries Government Documents Department
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Kaon-nucleus interactions

Description: The recent progress in hypernuclear physics, in particular the studies of ..lambda.. and ..sigma.. states via the strangeness-exchange (K/sup -/,..pi../sup -/) reaction, are reviewed. Prospects for future investigations with (proposed) intense kaon beams are also evaluated, for instance the production of high spin hypernuclei via the (..pi../sup +/,K/sup +/) reaction, and the formation of strangeness S = -2 hypernuclei (..lambda lambda.. or Xi/sup -/) by means of the (K/sup -/,K/sup +/) process… more
Date: January 1, 1980
Creator: Dover, C B
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Partner: UNT Libraries Government Documents Department
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A = 4 0/sup +/ - 1/sup +/ binding-energy difference

Description: The A = 4 ..lambda..-hypernuclei provide a rich source of information about the s-wave properties of the fundamental hyperon-nucleon (YN) force as well as offer a unique opportunity to investigate the complications that arise in calculations of the properties of bound systems in which one baryon (here the ..lambda..) with a given isospin couples strongly to another (the ..sigma..) with a different isospin. The ..lambda../sup 4/H - ..lambda../sup 4/He isodoublet ground-state energies are not con… more
Date: January 1, 1982
Creator: Gibson, B. F. & Lehman, D. R.
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Partner: UNT Libraries Government Documents Department
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Kaon-nucleus physics at low and medium energies

Description: Topics discussed for the treatment of kaon--nucleus physics at low and intermediate energies include K/sup +/ and K/sup -/ interactions exotic resonances, anti KN amplitudes optical potential graphs, kaon wave function in /sup 12/C, energy levels in /sup 12/C hypernuclei, and possibility of stable light systems with S = -. (JFP)
Date: April 1, 1977
Creator: Dover, C. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aspects of strangeness production with 15 -- 30 GeV proton beams

Description: We discuss the spectrum of physics questions related to strangeness which could be addressed with a 15--30 GeV proton storage ring. We focus on various aspects of strangeness production, including hyperon production in pp collisions, studies of hyperon-nucleon scattering, production of hyper-fragments in p-nucleus collisions, and hyperon spin observables in inclusive production.
Date: April 1, 1992
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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New directions in kaon-nucleus physics

Description: The prospects for nuclear physics with kaons are reviewed including (1) elementary interactions k/sup +-/N; (2) K/sup +/-induced processes on nuclei; (3) resonance physics with K/sup -/ and ..pi../sup +-/ (greater than or equal to 1 GeV/c/); (4) neutral kaon interactions; and (5) hypernuclear physics. Summary of kaon beam requirements is given. (WHK)
Date: January 1, 1982
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Binding energies of hypernuclei and. lambda. -nuclear interactions

Description: Variational Monte Carlo calculations have been made for the s-shell hypernuclei and also of /sup 9/Be hypernuclei with a 2..cap alpha.. + ..lambda.. model. The well depth is calculated variationally with the Fermi hypernetted chain method. A satisfactory description of all the relevant experimental ..lambda.. separation energies and also of the ..lambda..p scattering can be obtained with reasonable TPE ..lambda..N and ..lambda..NN forces and strongly repulsive dispersive ..lambda..NN forces whi… more
Date: January 1, 1985
Creator: Bodmer, A. R. & Usmani, Q. N.
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Partner: UNT Libraries Government Documents Department
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Selected problems in experimental intermediate energy physics

Description: The objectives of this research program are to: investigate forefront problems in experimental intermediate energy physics; educate students in this field of research; and, develop the instrumentation necessary to undertake this experimental program. Generally, the research is designed to search for physical processes which cannot be explained by conventional models of elementary interactions. This includes the use of nuclear targets where the nucleus provides a many body environment of strongl… more
Date: September 1, 1990
Creator: Mayes, B.W.; Hungerford, E.V. & Pinsky, L.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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S = -2 dibaryons and hypernuclei

Description: Future prospects for the exploration of doubly strange hypernuclear systems are evaluated. Such systems may be produced via the double strangeness exchange reactions (K/sup -/,K/sup +/) or (K/sup -/,K/sup 0/) on nuclear targets. Theoretical estimates are given of the formation cross sections for Xi/sup -/ hypernuclear states via the one-step K/sup -/p ..-->.. K/sup +/Xi/sup -/ process, or discrete states of the ..lambda lambda.. hypernucleus in the two step reaction K/sup -/p ..-->.. ..pi../sup… more
Date: January 1, 1982
Creator: Dover, C.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Strangeness exchange reactions and hypernuclei

Description: Recent progress in the spectroscopy of ..lambda.. and ..sigma.. hypernuclei is reviewed. Prospects for the production of doubly strange hypernuclei at a future kaon factory are assessed. It is suggested that the (K/sup -/,K/sup +/) reaction on a nuclear target may afford an optimal way of producing the H dibaryon, a stable six quark object with J/sup ..pi../ = O/sup +/, S = -2.
Date: January 1, 1982
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nonmesonic decay of the. lambda. in nuclear matter

Description: As a step towards the theoretical investigation of the ratio of nonmesonic to free decay rate of hypernuclei, the pion exchange has been recalculated including consideration of the contribution from rho exchange. (GHT)
Date: January 1, 1982
Creator: McKellar, B. H. J. & Gibson, B. F.
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Partner: UNT Libraries Government Documents Department
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Physics opportunities with PILAC

Description: In the Long Range Plan prepared in 1989 for nuclear science in the 1990's, this nation's ability to maintain nuclear science at the intellectual cutting edge'' was addressed. In this document a number of facilities designed to do this were cited, including the CEBAF electron accelerator and the RHIC heavy ion accelerator. Beyond these facilities the Report noted the scientific opportunities available with a high intensity hadron facility and emphasized the importance of studies of the strong fo… more
Date: January 1, 1991
Creator: Chrien, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Production of double hypernuclei via the (K/sup -/, K/sup +/) reaction

Description: Cross section estimates are presented for the formation of ..lambda lambda.. and ..xi.. hypernuclei in the (K/sup -/, K/sup +/) strangeness exchange reaction, both for transitions to particular low-lying final states and also for the summed cross section. The problem of the well depth and damping width for a ..xi../sup -/ in nuclear matter is also addressed.
Date: January 1, 1979
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent hypernuclear research at the Brookhaven AGS

Description: Recent AGS experiments contributing to our knowledge of hypernuclei are reviewed. These experiments have suggested new areas of research on hypernuclei. With the proper beam line facilities, the AGS will be able to perform experiments in these areas and provide a transition to the future era of ''kaon factories''. 20 refs., 14 figs.
Date: January 1, 1985
Creator: Chrien, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Open problems and future prospects for hypernuclear physics

Description: We appraise the current status of our knowledge of hypernuclear structure physics, and emphasize the unsolved problems. The prospects for significant advances in high resolution hypernuclear spectroscopy with CW electron beams at CEBAF or intense pion beams at the proposed PILAC facility at LPF are discussed. These facilities could greatly extend our understanding of strangeness S = {minus}1 hypernuclear systems. For S = {minus}2 systems, new events have been seen in a (K{sup {minus}},K{sup +})… more
Date: January 1, 1992
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Production of. lambda lambda. hypernuclei in the (K/sup -/,K/sup +/) reaction

Description: Very little data exists on doubly strange ..lambda lambda.. hypernuclei; only the ground states of /sub ..lambda lambda../He/sup 6/ and /sub ..lambda lambda../Be/sup 10/ have been seen in emulsion experiments. With existing K/sup -/ beam lines and magnetic spectrometer systems at CERN and Brookhaven, and the prospect of much higher K/sup -/ intensities at an eventual kaon factory, one is invited to consider the possibility that discrete states of ..lambda lambda.. hypernuclei may be observed di… more
Date: January 1, 1982
Creator: Baltz, A. J.; Dover, C. B. & Millener, D. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Summary of hypernuclear sessions

Description: Fifteen papers on hypernuclear physics are briefly summarized. Topics covered include the physics of deuterium and its strangeness analogues, a candidate for an S = -1 dibaryon resonance, bag model predictions for dibaryons, planned dibaryon searches, narrow Sigma states, calculations of quasi-free Sigma production, weak decay of Lambda hypernuclei, a cloudy quark-bag model calculation of the kaon-nucleon interaction, the Bonn potential applied to the Lambda-nucleon system, calculations of kaon… more
Date: January 1, 1986
Creator: Chrien, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electromagnetic transitions in hypernuclei

Description: The object of this review is to survey observations of electromagnetic transitions in hypernuclei and to point out contributions of these observations to an understanding of the effective two-body hyperon-nucleon forces in the nucleus. The discussion concentrates on lambda-hyperon nucleon potentials. Future plans for high resolution hypernuclear spectroscopy using Ge diode detectors is discussed, especially regarding the window of utility of such devices. Expected improvements in beam facilitie… more
Date: January 1, 1986
Creator: Chrien, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Strange quarks in nuclei

Description: We survey the field of strange particle nuclear physics, starting with the spectroscopy of strangeness S = {minus}1 {Lambda} hypernuclei, proceeding to an interpretation of recent data on S = {minus}2 {Lambda}{Lambda} hypernuclear production and decay, and finishing with some speculations on the production of multi-strange nuclear composites (hypernuclei or strangelets'') in relativistic heavy ion collisions. 41 refs., 5 figs.
Date: June 1, 1991
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The (. gamma. ,K) program: A new CEBAF initiative for the study of nuclear strangeness

Description: This paper is a summary of the CEBAF working group discussions on electromagnetic production of strangeness in nuclear systems. A review of the recent BNL results in (..pi..,K) is presented as representative of the physics questions that could be addressed with the CEBAF facility. Recommendations of the working group concerning the necessary experimental apparatus for a (e,e',K) program are presented. 13 figs., 2 tabs.
Date: June 1, 1987
Creator: Chrien, R. E. & Hungerford, E. V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Strangeness-exchange and strange nuclei

Description: The nuclear strangeness exchange reaction (K/sup -/,..pi../sup -/) is discussed. Possible reaction mechanisms are reviewed, and the spectroscopic ..lambda..-hypernuclear information derived from observation of strangeness exchange is discussed. The more general question of multiply-strange nuclei is introduced. 10 figures, 1 table, 32 references.
Date: January 1, 1978
Creator: Gal, A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Few body hypernuclear systems: Weak decays

Description: The experimental and theoretical situation regarding mesonic and non-mesonic decays of light hypernuclei is reviewed. Although some models give reasonable results for pionic decays as well as the total weak decay rate, no existing approach explains, even qualitatively, the observed spin-isospin dependence of ..lambda..N ..-->.. NN non-mesonic weak decays. 31 refs., 2 figs.
Date: January 1, 1987
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Kaon-nucleus reactions and hypernuclei

Description: Recent advances in hypernuclear physics and kaon-nucleus scattering are discussed, with emphasis on the spectroscopy of ..lambda.. single particle states in heavy systems, as revealed by the (..pi../sup +/,K/sup +/) reaction. 26 refs., 8 figs.
Date: January 1, 1987
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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