Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-12-02
Phys.Rev. D49 (1994) 4481-4492
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, SLAC-PUB-6403, PITHA 93/43, 9 Figs. available upon request. Written in LaTeX
Scientific paper
10.1103/PhysRevD.49.4481
We investigate the possibilities of searching for non-standard CP violation in $pp\to t\bar{t}X$ at multiple TeV collision energies. A general kinematic analysis of the underlying partonic production processes $gg\to t\bar{t}$ and $q\bar{q}\to t\bar{t}$ in terms of their density matrices is given. We evaluate the CP-violating parts of these matrices in two-Higgs doublet extensions of the standard model (SM) and give results for CP asymmetries at the parton level. We show that these asymmetries can be traced by measuring suitable observables constructed from energies and momenta of the decay products of $t$ and $\bar{t} $. We find CP-violating effects to be of the order of $10^{-3}$ and show that possible contaminations induced by SM interactions are savely below the expected signals.
Bernreuther Werner
Brandenburg Axel
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