Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-10-29
Phys.Rev. D61 (2000) 116004
Physics
High Energy Physics
High Energy Physics - Phenomenology
revtex file. 17 pages. 7 postscript figures. 1 table. The revised version includes an estimate of experimental uncertainties.
Scientific paper
10.1103/PhysRevD.61.116004
The contribution from the R parity violating interactions in the associated production of a top quark with a charm antiquark is examined for high energy leptonic colliders. We concentrate on the reactions associated with the semileptonic top decay. A set of characteristic dynamical distributions for the signal events is evaluated and the results contrasted against those from the standard model W-boson pair production background. Next, we turn to a study of a CP-odd observable, associated with the top spin, which leads to an asymmetry in the energy distribution of the emitted charged leptons for the pair of CP-conjugate final states, $b \bar l \nu \bar c$ and $ \bar b l \bar \nu c $. A non vanishing asymmetry arises from a CP-odd phase, embedded in the R parity violating coupling constants, through interference terms between the R parity violating amplitudes at both the tree and loop levels.
Chemtob Marc
Moreau Grégory
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