Speaker
Description
At hadron colliders, top quarks - the heaviest elementary particles
known- are dominantly produced in pairs (ttbar), a production
mechanism having been discovered more than twenty years ago at
Tevatron, Fermilab. Although the ttbar process has already entered the
domain of 'precision' Physics, especially with the advent of the
multi-TeV energies at the CERN Large Hadron Collider, there still
remains room for dedicated experimental measurements of the top quark
in the 'gap' of energies between Tevatron and LHC. Hence, the study
presented here measured the total inclusive cross-section for pair
production at a center-of-mass energy of 5.02 TeV having utilized a
low-pileup proton-proton (pp) collision dataset whose recorded
luminosity by CMS amounts to 26 pb-1. This work, has considered only
leptonic W decays, the latter characterized by the presence of an
energetic opposite-sign lepton pair plus missing energy. The current
measurement can be used for stronger constraints to the poorly known
gluon distribution (PDF) inside the proton at large longitudinal
parton momentum fraction, while it paves the way for the very first
observation of this elementary particle in nucleus-nucleus (AA)
collisions.
