Differential cross sections for top pair production at the LHC

Differential Cross Sections for Top-pair and Single-top Production

Like Sign Top Pair Production at Lhc

Having a mass comparable to the weak scale, the top quark may have a sizable flavor changing couplings to Higgs bosons. We show that such couplings can be probed at the LHC through the parton subprocess c(¯ c)g → t(¯ t)A 0 , where the pseudoscalar A 0 subsequently decays into t¯ c or ¯ tc, giving rise to the intriguing final state of like sign top quark pairs. We also discuss major backgrounds ...

Differential and Total Cross Sections for Top Pair and Single Top Production

Measurement of top quark pair differential cross sections

Measurements of normalized differential cross sections of top quark pair (tt̄) production are presented as a function of the mass, the transverse momentum and the rapidity of the tt̄ system in proton-proton collisions at center-of-mass energies of ffiffi s p 1⁄4 7 and 8 TeV. The data set corresponds to an integrated luminosity of 4.6 fb−1 at 7 TeV and 20.2 fb−1 at 8 TeV, recorded with the ATLAS d...

Top-quark pair production near threshold at LHC

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 colo...