Journal article
Investigation of the W and Q2 dependence of charged pion distributions in μp scattering
M Arneodo, A Arvidson, JJ Aubert, B Badelek, J Beaufays, CP Bee, C Benchouk, G Berghoff, I Bird, D Blum, E Böhm, X de Bouard, FW Brasse, H Braun, C Broll, S Brown, H Brück, H Calen, JS Chima, J Ciborowski Show all
Zeitschrift Fur Physik C Particles and Fields | SPRINGER VERLAG | Published : 1986
DOI: 10.1007/BF01559586
Abstract
The W and Q2 dependence of the fragmentation functions and of the average multiplicity of charged pions is investigated, using data from the NA9 experiment at the CERN SPS on muon-proton scattering at 280 GeV. A significant increase of pion production with increasing W is observed at fixed Q2, leading to a rise of the average charged pion multiplicity, linear in ln W2, and of the pion fragmentation function in the central region, i.e. at small |xF|. This increase can be understood from the kinematic widening of the cms rapidity range proportional to ln W2 and the observed W independent height of the rapidity distribution. At fixed W, a rise of the average charged pion multiplicity with Q2 is..
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