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Elsevier, Physics Letters B, 1-2(524), p. 44-54, 2002

DOI: 10.1016/s0370-2693(01)01269-2

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Inclusive π 0 and KS 0 production in two-photon collisions at LEP

Journal article published in 2002 by P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, H. Anderhub, V. P. Andreev, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, M. Baarmand and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The reactions e+e−→e+e−π0 X and e+e−→e+e−KS0 X are studied using data collected at LEP with the L3 detector at centre-of-mass energies between 189 and 202 GeV. Inclusive differential cross sections are measured as a function of the particle transverse momentum pt and the pseudo-rapidity. For pt⩽1.5 GeV, the π0 and KS0 differential cross sections are described by an exponential, typical of soft hadronic processes. For pt⩾1.5 GeV, the cross sections show the presence of perturbative QCD processes, described by a power-law. The data are compared to Monte Carlo predictions and to NLO QCD calculations.