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Experimental study of weak interactions by precision measurement of rare kaon decay, Task B

Description: This report discusses research on the following decay schemes and parameters: {epsilon}{prime}/{epsilon}; {Phi}{sub 00} {minus} {Phi}+{minus}; K{sub L} {yields} {pi}{sup 0}e{sup +}e{sup {minus}}; K{sub L} {yields} {pi}{sup 0}{delta}{delta}; {pi}{sup 0} {yields} e{sup +}e{sup {minus}}; K{sub LS} {yields} {pi}{sup +}{pi}{sup {minus}}{delta}; K{sub e4}; K{sub e3}; K{sub L} {yields} 3{pi}{sup 0} decay constant.
Date: April 1, 1992
Creator: Winston, Roland
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Particle production and spectra in E802 at BNL-AGS

Description: The production of {pi}, K, and protons measured in the E802 spectrometer are studied for p+A and Si+A collisions. Systematic properties of particle spectra and rapidity density distributions are discussed in terms of centrality and reaction system. A detailed comparison of the data to the RQMD model, which employs the experimental acceptance and cuts are presented. 8 refs., 6 figs.
Date: January 1, 1991
Creator: Videbaek, F.
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Partner: UNT Libraries Government Documents Department
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Two-photon couplings of quarkonia with arbitrary angular momenta

Description: The observation of a large {gamma}{gamma} width for the {sup 1}D{sub 2} q{bar q} state {pi}{sub 2}(1670) suggests that the {gamma}{gamma} couplings of many orbitally-excited light q{bar q} states may be experimentally accessible. In this talk we present {gamma}{gamma} helicity amplitudes for q{bar q} states with general angular momenta {sup 1}l{sub j} and {sup 3}l{sub j}, and note some relations and selection rules that may be useful in spectroscopic classification of orbital excitations. 14 re… more
Date: January 1, 1991
Creator: Barnes, T. (Oak Ridge National Lab., TN (United States) Tennessee Univ., Knoxville, TN (United States). Dept. of Physics and Astronomy)
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Partner: UNT Libraries Government Documents Department
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Interface effects on dose distributions in irradiated media

Description: It has long been recognized that nonuniformities in dose distributions may occur in the immediate vicinity of a boundary between two different media. Considerable work has been done to determine interface effects in media irradiated by photons or in media containing ..beta..- or ..cap alpha..-particle emitters. More recently interface effects have become of interest in additional problems, including pion radiotherapy and radiation effects in electronic microcircuits in space vehicles. These pro… more
Date: January 1, 1980
Creator: Wright, H.A.; Hamm, R.N. & Turner, J.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experiments on eta-meson production

Description: Following a review of some highlights of eta-meson characteristics, the status of eta-meson production experiments is reviewed. The physics motivations and first results of two LAMPF experiments on (..pi..,eta) reactions are discussed. Possible future experiments are also discussed. 42 refs., 12 figs., 4 tabs.
Date: January 1, 1985
Creator: Peng, J.C.
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Partner: UNT Libraries Government Documents Department
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N and. delta. resonances: an experimental review

Description: Experimental progress in N and ..delta.. resonances since the Oxford baryon conference is reviewed. The review concentrates on hadronic channels, and on developments of the last one or two years. The topics reviewed include the antiproton lifetime; the ..delta../sup + +/ magnetic moment; measurements of ..pi..N elastic and charge-exchange scattering in the ..delta.. region, the eta n threshold region, and the high-mass region; partial wave analyses of ..pi..N ..-->.. ..pi..N; measurements of tw… more
Date: July 1, 1980
Creator: Kelly, R.L.
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Partner: UNT Libraries Government Documents Department
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Performance characteristics of large aperture, ten-cell, atmospheric pressure isobutane Cherenkov counters

Description: Two large aperture, 10 cell atmospheric-pressure isobutane Cherenkov counters were designed and constructed for a SLAC streamer chamber experiment. The rejection efficiencies for a 9 GeV/c ..pi../sup -/ were measured to be 99.838 +- .006% and 99.717 +- 008% for the two counters. The design details and performance characteristics are discussed.
Date: May 24, 1980
Creator: Hylen, J.; Ma, Z.M.; Jawahery, A.; Maruyama, T.; Milburn, R. & Thornton, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calculated hadronic transmission through iron absorbers

Description: The transmission of hadrons through iron absorbers is investigated for a variety of experimental configurations, and incident particle types (protons, and charged pions) and energies (0.8 GeV/c to 100 GeV). The results obtained are consistent with available experimental data.
Date: March 1, 1978
Creator: Gabriel, T. A. & Bishop, B. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nuclear de-excitation processes following medium energy heavy ion collisions

Description: As heavy ion reaction studies have progressed from beam energies below 10 MeV/nucleon to higher energies, many non-equilibrium reaction phenomena have been observed. Among these are nucleon emission with velocities in excess of the beam velocity, incomplete momentum transfer to evaporation residue and fission-like fragments, ..gamma..-rays with energies in excess of 100 MeV, and ..pi../sup 0/ production when beam energies are below the threshold for production by the nucleon-nucleon collision m… more
Date: September 1, 1986
Creator: Blann, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Production of. gamma. ,. pi. /sup 0/ and eta at large transverse momenta

Description: A measurement of direct photon production, as well as of ..pi../sup 0/ and eta meson production, has been performed at Fermilab. Data were taken for 200 GeV/c p and ..pi../sup +/ incident on Be, C and Al targets. The ratio of ..gamma../..pi../sup 0/ inclusive cross sections is presented for transverse momenta between 2 and 5 GeV/c.
Date: January 1, 1982
Creator: Biel, J.; Bromberg, C. & Brown, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Isolated single and double direct photon production at CDF

Description: We present measurements of isolated direct phonon production in {bar p}p collisions at {radical}s = 1.18 TeV from the 1988--89 run of the Collider Detection at Fermilab (CDF). Quantum Chromodynamics is tested against measurements of the transverse momentum spectrum of single photon production ({bar p}p {yields} {gamma} + X), double photon production ({bar p}p {yields} {gamma}{gamma} + X), and the distribution of cos{theta} * in photon-jet events ({bar p}p {yields} {gamma}{sub J} + X). We also p… more
Date: September 1, 1991
Creator: Harris, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radiative J/psi decays and the pseudoscalar puzzle

Description: Recent results on radiative decays of the J/PSI, obtained by the SPEAR detectors Mark III and Crystal Ball and the DCI detector DM2 at Orsay, are presented. The status of the glueball candidates theta(1690), iota(1460), and xi(220), and the decays J/PHI ..-->.. ..gamma.. Vector Vector are reviewed. A coupled channel analysis of iota(1460) decays to K anti K..pi.., rho rho, ..omega omega.., and ..gamma..rho is presented which may help to understand the pseudoscalar sector in radiative J/PHI deca… more
Date: July 1, 1985
Creator: Wermes, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mark III results from SPEAR

Description: 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: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Spectroscopy of the UPSILON(2S) with the Crystal Ball

Description: The Crystal Ball experiment has been taking data at the DORIS II storage ring at DESY/Hamburg on the UPSILON(2S) and UPSILON(1S) resonances since summer 1982. Results on the hadronic transitions between the UPSILON(2S) and the UPSILON(1S) are presented as well as measurements of the radiative decays of the UPSILON(2S) to the chi/sub b/ states in inclusive and exclusive channels. The exclusive UPSILON(2S) ..-->.. ..gamma..chi/sub b/ ..-->.. ..gamma gamma..UPSILON(1S) ..-->.. ..gamma gamma..l/sup… more
Date: April 1, 1985
Creator: Irion, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent Results From DELCO

Description: DELCO is a magnetic spectrometer with Cerenkoc, Time-of-Flight (TOF) and shower counters for particle identification. It is located in IR8 of the PEP storage ring. Data have been obtained at a center of mass energy, ..sqrt..s, of 29 GeV. We report on: (1) the fraction of P, K, ..pi.. in hadronic events; (2) the observation of direct electron signals; and (3) the measurement of D* fragmentation function and its total cross-section. 8 references.
Date: November 1, 1983
Creator: Atwood, W. B.; Baillon, P. H.; Barish, B. C.; Bonneaud, G. R.; DeStaebler, H.; Donaldson, G. J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Production of high energy density in anti N-nucleus interactions

Description: The results of an investigation of anti p- (and to a lesser extent) anti d- nucleus interactions are reported. The technique involves following the classical production and propagation of mesons (..pi..,K/sup +/, K/sup 0/, K/sup -/, K/sup 0/, K*, eta, ..omega.., phi) and baryons (N,..lambda..,..sigma..) in nuclei after antiparticle annihilation. It is found that small regions of the nucleus can be raised to sufficiently high energy densities that some predictions of a quark-gluon phase transiti… more
Date: January 1, 1986
Creator: Gibbs, W.R.
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Partner: UNT Libraries Government Documents Department
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Pion-induced scattering above the 3,3 resonance

Description: Results of Gluaber model calculations of elastic, inelastic, single- and double-charge exchange reactions from light nuclei of pions having energy of 300 to 1200 MeV are presented. Experimental {pi}N phase shifts including {ell}=0 through 5 were used in the calculation. 25 refs., 6 figs.
Date: January 1, 1991
Creator: Oset, E. (Valencia Univ. (Spain)) & Strottman, D. (Los Alamos National Lab., NM (United States))
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Partner: UNT Libraries Government Documents Department
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Fragmentation model applied to exclusive final states in photon-photon collisions

Description: Monte Carlo calculations with the Lund string fragmentation model are compared to experimental results on the reactions ..gamma gamma -->..2..pi../sup +/2..pi../sup -/, ..gamma gamma -->..K/sup +/K/sup -/..pi../sup +/..pi../sup -/ and ..gamma gamma -->..p anti p..pi../sup +/..pi../sup -/. It is found, that when the parameters of the Lund model are tuned to low energy, inclusive multi hadron production in photon-photon collisions, the cross sections of exclusive processes near threshold are qual… more
Date: July 1, 1986
Creator: Buijs, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photon-Photon Physics with the Mark II at PEP

Description: Photon-photon interactions are studied with the Mark II detector at PEP. The inclusive production of charged hadrons at large transverse momenta and the exclusive production of meson pairs at large invarient mass are compared with recent hard scattering calculations. Copious inclusive production of K/sup 0/'s at large transverse momenta provides evidence for charm production. The radiative width of the f'(1520) is measured via its K/sub s//sup 0/ anti K/sub s//sup 0/ decay mode.
Date: April 1, 1986
Creator: Gidal, G.
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Partner: UNT Libraries Government Documents Department
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Role of valons in low-p/sub T/ physics

Description: Hadron structure is described in the framework in which a nucleon is treated as a composite system of three valence quark clusters, called valons. Their momentum distribution is extracted from deep inelastic scattering data. The valon representation provides a quantitative description of the recombination function, which characterizes the hadronization of quarks. A formalism is then developed in terms of valons and quarks such that the inclusive distributions for hadronic reactions at low-p/sub… more
Date: January 1, 1980
Creator: Hwa, R.C.
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Partner: UNT Libraries Government Documents Department
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Mechanism of pion absorption in complex nuclei

Description: Basic geometrical arguments are used to analyze the A dependence of the total pion absorption cross section, the effective number of nucleons sharing the pion momentum and energy, and the proton yields from ..pi../sup +/- and ..pi../sup -/-induced reactions. The results are consistent with the pions penetrating some distance through the nuclear volume and annihilating on a pair of nucleons. 3 figures.
Date: unknown
Creator: Doss, K.G.N. & Wharton, W.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutral pion photoproduction of the nucleon near threshold

Description: Neutral pion photoproduction on the nucleon near threshold is investigated using a dynamical model. It is shown that the commonly used procedure, based on an analytical continuation of the K-matrix to the unphysical region, is not compatible to a dynamical approach. We show that the final state interaction (FSI) amplitude derived from a dynamical model could involve large cancellation between the different pion photoproduction mechanisms. This leads that the FSI due to the intermediate {pi}{sup… more
Date: January 1, 1989
Creator: Nozawa, S.; Lee, T. S. H.; Blankleider, B. (Argonne National Lab., IL (USA) & Patterson, Moos and Co., Inc., Long Island City, NY (USA))
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Partner: UNT Libraries Government Documents Department
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