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Elsevier, Physics Letters B, 1-2(514), p. 19-28, 2001

DOI: 10.1016/s0370-2693(01)00374-4

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Measurement of the charm production cross section in γγ collisions at LEP

Journal article published in 2001 by M. Acciarri, P. Achard, O. Adriani, M. Aguilar Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, G. Ambrosi, H. Anderhub, V. P. Andreev, T. Angelescu, F. Anselmo, A. Arefiev 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

Open charm production in γγ collisions is studied with data collected at e + e − centre-of-mass energies from 189 GeV to 202 GeV corresponding to a total integrated luminosity of 410 pb −1 . The charm cross section σ(γγ→cc̅X) is measured for the first time as a function of the two-photon centre-of-mass energy in the interval from 5 GeV to 70 GeV and is compared to NLO QCD calculations.