PSEUDORAPIDITY DISTRIBUTION OF CHARGED-PARTICLES IN (P)OVER-BAR-P COLLISIONS AT ROOT-S=630 GEV

Using a silicon vertex detector, we measure the charged particle pseud orapidity distribution over the range 1.5 to 5.5 using data collected from <p(p)over bar> collisions at root s = 630GeV. With a data sample of 3 x 10(6) events, we deduce a result with an overall normalization uncertainty of 5%, acid typical bin to bin errors of a few percent. We compare our result to the measurement of UA5, and the distribution ge nerated by the Lund Monte Carlo with default settings. This is only th e second measurement at this level of precision, and only the second m easurement for pseudorapidity greater than 3. (C) 1997 Published by El sevier Science B.V.