[en] We report a particle source imaging analysis based on two-pion correlations in high multiplicity Au< hspace SPACE=''-0.167''>< hspace SPACE=''-0.167''>+< hspace SPACE=''-0.167''> < hspace SPACE=''-0.167''>Au collisions at beam energies between 2A and 8A GeV . We apply the imaging technique introduced by Brown and Danielewicz, which allows a model-independent extraction of source functions with useful accuracy out to relative pion separations of about 20fm. The extracted source functions have Gaussian shapes. Values of source functions at zero separation are almost constant across the energy range under study. Imaging results are found to be consistent with conventional source parameters obtained from a multidimensional Hanburg-Brown--Twiss analysis

[en] Directed flow measurements for Λ hyperons are presented and compared to those for protons produced in the same Au+Au collisions (2A, 4A, and 6AGeV; b<5-6 fm ). The measurements indicate that Λ hyperons flow consistently in the same direction but with smaller magnitudes. A strong positive flow [for Λ s] has been predicted in calculations which include the influence of the Λ -nucleon potential. The experimental flow ratio Λ/p is in qualitative agreement with expectations (∼2/3 ) from the quark counting rule at 2AGeV but is found to decrease with increasing beam energy

[en] An overview of recent results from bar pp annihilation at rest obtained with the Crystal Barrel is presented. These results, which provide information on meson spectroscopy, two-body final states, and meson-decay modes, offer new insight in a number of directions; the results and their implications are discussed. 49 refs., 9 figs., 1 tab

[en] The evolution of lymphatic-associated soft tissue changes in lymphatic filariasis as well as non-filarial forms of lymphedema remains poorly understood in part because of a lack of noninvasive methods of lymphatic visualization. Prieviously, in ferrets chronically infected with filariasis by intrascrotal, inguinal or multiple footpad injections, the authors described whole-body lymphangioscintigraphic image patterns which correlated closely with structural findings of lymphatic obstruction and neocollateralization at operation or autopsy. To evaluate these acquired lymphatic abnormalities further, magnetic resonance imaging (MRI) was used because of its high soft tissue resolution, versatility and specificity. (author)

[en] The results of a Monte Carlo simulation of muon catalyzed fusion in H/D/T mixtures at low deuterium and tritium concentrations are presented, and the kinetics of the dt branch of the μCF cycle is discussed. It is shown that the epithermal effects in the dtμ cycle produce a multi-component structure in the time spectra of dt fusion, in agreement with the recent experimental results obtained by the μCF collaboration at PSI. The importance of further studies of the μCF reactions in triple mixtures is emphasized. (orig.)

[en] Large discrepancies have existed, factor of ∼2.5 (∼5σ), between a variety of cascade-type theoretical models and published experimental results for the inclusive protonlike production corss sections at the 20 degree polar laboratory angle for relativistic La + La collisions. In view of this discrepancy the present work was undertaken to check the experimental cross sections for 0.76 GeV/nucleon La + La collisions using a small-acceptance magnetic spectrometer. The 20 degree cross sections were determined by measuring the appropriate range of polar laboratory angles and momenta which, when transformed into the projectile frame, produce the cross sections at 20 degree. Cross sections have been determined from 30 degree to 75 degree for protons and light nuclei with rigidities from 0.5 to 2.0 GeV/c in the laboratory frame. Cross sections were also deduced at 15 degree and 20 degree in the projectile frame for nucleon momenta from 0.9 to 1.5GeV/c. The original experimental results for the larger polar laboratory angles (40 degree and 60 degree) were confirmed; however, the 20 degree cross sections disagree by a factor of about 1.5 (∼2σ). At large polar laboratory angles (40 degree -70 degree) the model calculations disagrees in the low-momentum range with the present data by a factor of 1.5 (∼3σ). The discrepancy at small polar angles (15 degree and 20 degree) has been significantly reduced from the original factor of 2.5 down to a value of 1.2 (∼3σ)

[en] The (rvec n) + p → d + γ experiment under construction at LANSCE studies the weak interaction between neutrons and protons. The experiments will measure the directional dependence of the parity-violating γ-ray asymmetry, A_γ, in the polarized cold neutron capture by para-hydrogen. The goal is to measure A_γ with uncertainty of 0.5 x 10^-8, 10% of its predicted value. A_γ primarily isolates the ΔI = 1 component of the hadronic weak interaction and thus will determine the long-range weak pion-nucleon coupling constant H_π¹. The experiment is carefully designed for the LANSCE pulsed spallation neutron source to achieve the proposed statistical precision and to control systematic errors. We discuss the experiment and its status.

[en] An experiment to measure γ-ray asymmetry A_γ with a high precision in neutron-proton radiative capture is under construction at LANSCE. The experiment will determine the weak pion-nucleon coupling constant H_π¹,, 30% of its predicted value

[en] We plan to measure the rate of the electroweak charged-current reaction μ^- + p → n+ν_μ with 1% precision using a new experimental technique based on a high pressure time projection chamber filled with ultrapure hydrogen gas [1]. The capture rate is sensitive to the weak form factors of the nucleon, in particular to the induced pseudoscalar coupling constant g_P which will be measured with ∼ 6% accuracy

[en] Rapidity distributions of protons from central ¹⁹⁷Au+ ¹⁹⁷Au collisions measured by the E895 Collaboration in the energy range from (2-8)A GeV at the Brookhaven AGS are presented. Longitudinal flow parameters derived using a thermal model including collective longitudinal expansion are extracted from these distributions. The results show an approximately linear increase in the longitudinal flow velocity, <βγ>_L , as a function of the logarithm of beam energy