2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C16, 471-479
DOI 10.1007/s100520000426

The relevance of ${\mathbf {\gamma^*_{\mathrm {L}}}}$ in hard collisions of virtual photons

J. Chýla - M. Tasevský

Institute of Physics, Na Slovance 2, Prague 8, Czech Republic

Received: 30 March 2000 / Published online: 6 July 2000 - © Springer-Verlag 2000

Abstract
We explore the relevance of extending the concept of the partonic structure to the longitudinally polarized virtual photon involved in hard collisions. We show that for moderate photon virtualities and in the kinematical region accessible in current experiments at HERA and LEP, the contributions of its longitudinal polarization to hard collisions are sizable and should be taken into account as part of the resolved photon component.


Copyright Società Italiana di Fisica, Springer-Verlag 2000