https://doi.org/10.1140/epjc/s10052-009-0892-7
Regular Article - Theoretical Physics
Top-quark pair production near threshold at LHC
1
Institut für Theoretische Teilchenphysik, Universität Karlsruhe (TH), Karlsruhe Institute of Technology (KIT), 76128, Karlsruhe, Germany
2
Deutsches Elektronen-Synchrotron DESY, 15738, Zeuthen, Germany
3
Institut für Physik, Humboldt-Universität zu Berlin, 10099, Berlin, Germany
* e-mail: matthias.steinhauser@uka.de
Received:
4
December
2008
Revised:
7
January
2009
Published online:
19
February
2009
The next-to-leading order analysis for the cross section for hadroproduction of top-quark pairs close to threshold is presented. Within the framework of non-relativistic QCD a significant enhancement compared to fixed-order perturbation theory is observed which originates from the characteristic remnant of the 1S peak below production threshold of top-quark pairs. The analysis includes all color-singlet and color-octet configurations of top-quark pairs in S-wave states and, for the dominant configurations, it employs all-order soft-gluon resummation for the hard parton cross section. Numerical results for the Large Hadron Collider at
TeV and
TeV and also for the Tevatron are presented. The possibility of a top-quark mass measurement from the invariant-mass distribution of top-quark pairs is discussed.
PACS: 12.38.Bx – / 12.38.Cy – / 14.65.Ha –
© Springer-Verlag , 2009
