Vol.2, No 1, 1999 pp. 39 - 45
UDC 531.715
SHOWER PARTICLE MULTIPLICITY DISTRIBUTIONS
FOR COLLISIONS OF 200-400 GEV/C PROTONS WITH EMULSION
S. Drndarević, G. Škoro, D. Krpić
Faculty of Physics, University of Belgrade, Studentski trg 12, P.O.
Box 386, 11001 Belgrade, Yugoslavia
Abstract. In this work we study the asymmetry in the appearance
of even and odd number of secondary pions in interactions of 200, 300 and
400 GeV/c protons with emulsion nuclei. We found that in so-called 'white
stars' the number of events with odd pion multiplicity cannot be explained
by the mechanism of coherent particle production. We also discuss the behavior
of this asymmetry as a function of the multiplicity of heavy particles
and the number of fast protons for the total sample of events.
Key words: even-odd effect, high-energy hadron-nucleus
collisions
DISTRIBUCIJE MULTIPLICITETA
RELATIVISTIČKIH ČESTICA U SUDARIMA PROTONA
OD 200-400 GEV/C, SA EMULZIJOM
Analizirana je asimetrija pojavljivanja parnih i neparnih multipliciteta
sekundarnih piona nastalih u interakcijama protona sa nuklearnom emulzijom
na 200, 300 i 400 GeV/c. Utvrđeno je da mehanizam koherentne produkcije
čestica ne objašnjava u potpunosti broj događaja sa neparnim multiplicitetima
piona u tzv. 'belim zvezdama'. Dat je prikaz zavisnosti asimetrije od multipliciteta
teških čestica i brzih protona.
Ključne reči: par-nepar efekat, hadron-jezgro sudari na visokim
energijama
