DOI 10.1007/s100520000535
Theoretical description of the total
cross-section
and its confrontation with the LEP data on doubly tagged e+e- events
J. Kwiecinski1 - L. Motyka2,3
1 Department of Theoretical Physics,
H. Niewodniczanski Institute of Nuclear Physics, Cracow, Poland
2 High Energy Physics, Uppsala University, Uppsala, Sweden
3 Institute of Physics, Jagellonian University, Cracow, Poland
Received: 4 October 2000 / Published online: 27 November 2000 - © Springer-Verlag 2000
Abstract
We perform a detailed analysis of the total inelastic cross-section
for
collisions. Different contributions
coming from the quark box diagram, reggeons, the soft and hard
pomeron are included. The QCD pomeron contribution contains a dominant
part of subleading effects which reduces its intercept
and delays the onset of the asymptotic pomeron to high energies.
Estimates of the cross-section for doubly-tagged
events are presented and compared
with the existing LEP data. Good agreement between the theoretical
results and the experimental data is found.
We also comment on the extraction of the BFKL pomeron intercept from
the available LEP measurements.
Copyright Società Italiana di Fisica, Springer-Verlag 2000
