| Title: | INCLUSIVE π0 AND  PRODUCTION IN TWO-PHOTON COLLISIONS AT LEP |
| DOI No: | 10.1142/9789812777157_0009 |
| Source: | PHOTON 2001 (pp 49-52)
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| Author(s): | P. ACHARD
DPNC, 24 quai Ansermet, 1211 GENEVE 4, Switzerland
on behalf of the L3 Collaboration |
| Abstract: | The reactions e+e- → e+e-π0 X and  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  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 NLO QCD calculations. |
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