Inclusive charged hadron production in two-photon collisions at LEP

Creators: Achard, P.; Favara, A.; Gataullin, M.; Newman, H.; Shevchenko, S.; Shvorob, A.; Xia, L.; Zhu, R. Y.; L3 Collaboration

Abstract

Inclusive charged hadron production, e+e−→e+e−h±X, is studied using 414 pb^(−1) of data collected at LEP with the L3 detector at centre-of-mass energies between 189 and 202 GeV. Single particle inclusive differential cross sections are measured as a function of the particle transverse momentum, pt, and pseudo-rapidity, η. For pt⩽1.5 GeV, the data are well described by an exponential, typical of soft hadronic processes. For higher pt, the onset of perturbative QCD processes is observed. The π± production cross section for pt>5 GeV is much higher than the NLO QCD predictions.

Additional Information

© 2003 Elsevier Science B.V. Open access under CC BY license. Open Access funded by SCOAP3 - Sponsoring Consortium for Open Access Publishing in Particle Physics. Received 5 November 2002; received in revised form 16 December 2002; accepted 6 January 2003. Supported by the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie. Supported by the National Natural Science Foundation of China. Supported by the Hungarian OTKA fund under contract numbers T019181, F023259 and T037350. Also supported by the Hungarian OTKA fund under contract number T026178. Supported also by the Comisión Interministerial de Ciencia y Tecnologı́a. Also supported by CONICET and Universidad Nacional de La Plata, CC 67, 1900 La Plata, Argentina.

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