In the CERN NA32 experiment a high-resolution silicon vertex detector and a purely topological approach were used to collect 557 events consistent with associated charm production, both decay vertices being observed. The pseudorapidity gap distribution appears to be nearly independent of the nature of the charmed hadrons. This distribution is reasonably consistent with the next-to-leading order QCD calculations. However the azimuthal-angle distribution is significantly broader than the above predictions.
FOR ONLY 20 EVENTS IN WICH BOTH DECAYS ARE FULLY RECONSTRUCTED ( 26 D0 , 8 D+ , 5 D/S+ , 1 LAMBDA/C+ CHARMED PARTICLES ).
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43 EVENTS WITH LAMBDA, 54 EVENTS WITH KS.
43 EVENTS WITH LAMBDA, 54 EVENTS WITH KS.
43 EVENTS WITH LAMBDA, 54 EVENTS WITH KS. D(N)/D(P) WAS FITTED BY P**2*EXP(-SLOPE*EKIN).
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CENTRAL COLLISIONS.
CENTRAL COLLISIONS.
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AUTHORS FIT D2(SIG)/D(XL)/D(PT**2) BY (1-XL)**POWER*EXP(-SLOPE*PT**2).
AUTHORS FIT D2(SIG)/D(XL)/D(PT**2) BY (1-XL)**POWER*EXP(-SLOPE*PT**2).
AUTHORS FIT D2(SIG)/D(XL)/D(PT**2) BY (1-XL)**POWER*EXP(-SLOPE*PT**2).
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FORWARD-BACKWARD ASYMMETRY OF PARTICLE ... PRODUCTION ENCODED IN THIS TABLE AS (SIG(C=... FORW)-SIG(C=... BACKW))/(SIG(C=... FORW)+SIG(C=... BACKW)).
FORWARD-BACKWARD ASYMMETRY OF PARTICLE ... PRODUCTION ENCODED IN THIS TABLE AS (SIG(C=... FORW)-SIG(C=... BACKW))/(SIG(C=... FORW)+SIG(C=... BACKW)).
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