Pseudorapidity Distribution of Charged Particles in PbarP Collisions at root(s)= 630GeV
R. Harr (5), C. Liapis (6), P. Karchin (5), C. Biino (4), S. Erhan, (2), W. Hofmann (1), P. Kreuzer (2), D. Lynn (2), M. Medinnis (2), S., Palestini (4), L. Pesando (4), M. Punturo (3), P. Schlein (2), B. Wilkens, (1), J. Zweizig (2) ((1) Max-Planck-Institut fur Kernphysik
TL;DR
This paper presents a precise measurement of charged particle pseudorapidity distribution in proton-antiproton collisions at 630 GeV, extending the understanding of particle production at high energies.
Contribution
It provides one of the first high-precision measurements of pseudorapidity distribution for eta > 3 in pbar-p collisions at this energy.
Findings
Distribution agrees with UA5 measurements
Results are consistent with Lund Monte Carlo simulations
Provides new data for high pseudorapidity region
Abstract
Using a silicon vertex detector, we measure the charged particle pseudorapidity distribution over the range 1.5 to 5.5 using data collected from PbarP collisions at root s = 630 GeV. With a data sample of 3 million events, we deduce a result with an overall normalization uncertainty of 5%, and typical bin to bin errors of a few percent. We compare our result to the measurement of UA5, and the distribution generated by the Lund Monte Carlo with default settings. This is only the second measurement at this level of precision, and only the second measurement for pseudorapidity greater than 3.
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