Tracing CP violation in the production of top quark pairs by multiple TeV proton-proton collisions.

摘要: We investigate the possibilities of searching for nonstandard $\mathrm{CP}$ violation in $\mathrm{pp}\ensuremath{\rightarrow}t\overline{t}X$ at multiple TeV collision energies. A general kinematic analysis underlying partonic production processes $\mathrm{gg}\ensuremath{\rightarrow}t\overline{t}$ and $q\overline{q}\ensuremath{\rightarrow}t\overline{t}$ terms their density matrices is given. evaluate $\mathrm{CP}$-violating parts these two-Higgs-doublet extensions standard model (SM) give results asymmetries parton level. show that can be traced by measuring suitable observables constructed from energies momenta decay products $t$ $\overline{t}$. find effects to order ${10}^{\ensuremath{-}3}$ possible contaminations induced SM interactions are safely below expected signals.