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: We present the results of a study performed on the interactions of 10.6A GeV gold nuclei in nuclear emulsions. In a minimum bias sample of 1311 interactions, 5260 helium nuclei and 2622 heavy fragments were observed as Au projectile fragments. The experimental data are analyzed with particular emphasis of target separation interactions in emulsions and study of critical exponents. Multiplicity distributions of the fast-moving projectile fragments are investigated. Charged fragment moments, conditional moments as well as two and three -body asymmetries of the fast moving projectile particles are determined in terms of the total charge remaining bound in the multiply charged projectile fragments. Some differences in the average yields of helium nuclei and heavier fragments are observed, which may be attributed to a target effect. However, two and three-body asymmetries and conditional moments indicate that the breakup mechanism of the projectile seems to be independent of target mass. We looked for evidence of critical point observable in finite nuclei by study the resulting charged fragments distributions. We have obtained the values for the critical exponents γ, β and τ and compare our results with those at lower energy experiment (1.0A GeV data). The values suggest that a phase transition like behavior, is observed .

S+Au interactions at 200,4 GeV were observed using emulsion chambers, permitting measurement of pseudorapidities in the central region with precision --0.01 unit. Scaled-factorial-moment analyses are extended to bin sizes smaller than those accessible to other fixed-target experimental techniques. For a sample of 151 central collisions, moments are calculated using both "horizontal" and "vertical" analysis techniques. While the moments are found to rise (in a log-log plot) with decreasing pseudorapidity bin size 8rf, their slopes roll off to approximately zero for 8rj < 0.1.

The purpose of this note is to report the existence of marked departures from phase space in the effective-mass distributions for the H7i and KK states. We present evidence that, in about 25% of the events observed, the HTT state results from the decay of a resonant state (H ) with a mass of 1535 MeV and a full width of <35 MeV. The observed anomaly in the KK effectivemass distribution is possibly open to different interpretations. If we assume it to be due to the decay of a resonant state K*, we find that M# * = 1020 MeV, and that it has a full width of 20 MeV. However, it may also be possible to explain the effect as due to S-wave KK scattering. These results, as well as preliminary evidence concerning the properties of the E and K , are discussed below.The data for this experiment were obtained in an exposure of the BNL 20-in. hydrogen bubble chamber at the Brookhaven AGS. Details of the exposure and beam have been previously discussed. 1 Data were obtained both at 2.24 and 2.5 BeV/c. The sample reported on here consists of 79 HTT and 37 KK combinations from the following production modes:All events were measured and analyzed using the BNL TRED-KECK system. Except for Reaction (Id), 2 we believe the contamination from other topologically similar event types to be negligible. H°+7TH°+77

ARTICLESNeutral strange particle production in neutrino and antineutrino charged-current interactions on neon D. D e P r o~p o ,~~' M. Kalelkar,16 M. ~d e r h o l z , '~ H. ~k b a r i , l ' t P.P. ~l l p o r t ,~~