Heavy Flavour Production in Two-Photon Collisions at LEP

TL;DR

This paper presents recent experimental results on heavy quark and meson production in two-photon collisions at LEP, including cross sections, decay channels, and searches for new states, advancing understanding of quantum chromodynamics.

Contribution

It provides the first combined measurements of charm and bottom production cross sections and explores new exclusive meson production channels at LEP energies.

Findings

Measured charm and bottom cross sections at LEP 2

Studied inclusive J/psi and eta_c production

Conducted first searches for eta_b meson

Abstract

New results from the experiments ALEPH, DELPHI, L3, and OPAL on heavy quark production in gammagamma collisions are presented. Inclusive charm and bottom production are investigated at LEP~2 energies. The total and differential cross sections for charm quarks are now measured by all four LEP collaborations, the total bottom by two. Charmonia are studied inclusively via the muonic decay of the J/psi and separated for the resolved and diffractive processes. New results are available for exclusive production of the eta_c meson. First searches for exclusive eta_b production are presented.