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CENTRAL COLLISIONS.
CENTRAL COLLISIONS.
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P - IS PROTON-PARTICIPANTS, ITS NUMBER WAS DEFINED AS FOLLOWS: N(P)=N+ - N - N(S,P) - N(S,T), WHERE N+ , N- - NUMBER OF MULT(CHARGED) PARTICLES WITH Z=+1 AND Z=-1, N(S,P), N(S,T) - NUMBER OF STRIPPING PARTICLES WITH Z=1 FROM PROJECTILE (P>3 GEV, THETA<4 DEG) AND TARGET (P<0.3 GEV FOR PROTONS).
The transverse-momentum spectra of lambdas (Λ0, Λ¯0) produced in the central region has been measured in p¯p collisions at s=1.8 TeV at the Fermilab Collider. We find that the average transverse momentum of the lambdas increases more rapidly with center-of-mass energy than that of charged particles, and the ratio of lambdas to charged particles increases as a function of center-of-mass energy.
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ALL NEGATIVE PARTICLES WAS CONSIDERED AS PI-.
ALL NEGATIVE PARTICLES WAS CONSIDERED AS PI-.
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Light ion collisions with carbon target at 4.2 GeV/c/N are studied. Pion multiplicity distributions, momentum and angular spectra are analysed. These data are described in terms of models assuming independent interactions of nucleons from the projectile nucleus with the target.
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PROTONS INVOLVED HAVE MAXIMUM VALUE OF CUMULATIVE VARIABLE (E-PL)/M IN EVENT.
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The production properties ofKs0,\(\bar \Lambda\) andK+p interactions at 32 GeV/c are investigated using the final statistics of the experiment. We present total and semi-inclusive cross sections and aver-age multiplicities. Estimates are given of the diffractive dissociation contributions to total and differential cross sections. Thex-,pT−, and transverse mass dependence of inclusive and semi-inclusive distributions is discussed as well as properties of “prompt”Ks0's. The ratio of “prompt”K890+ (K8900) to “prompt”K0 cross sections is measured to be 1.03±0.12 (0.98±0.17). From a comparison of\(\bar \Lambda\) production inK±p interactions at 32 GeV/c, we estimate a strange sea-quark suppression of 0.26 ±0.02. The double differential cross sections ofKs0's is studied as a function of Feynman-x andpT2, and a Triple-Regge fit performed. The data are compared in detail to versions of the Lund-model for low-pT hadronic collisions.
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