New CP-odd Observable in H -> t \bar{t}

Details New CP-odd Observable in H -> t \bar{t} New CP-odd Observable in H -> t \bar{t}

2005-12-09

arxiv.org/abs/hep-ph/0512127v3

Phys.Rev.D73:053009,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

typos corrected, version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.73.053009

We study a CP-violating triple product correlation that occurs in the decay of a neutral Higgs boson into t\bar{t} pairs when the Higgs boson does not have a definite CP nature. We consider the H -> t \bar{t} decay channel as well as the gluon fusion process gg -> H -> t \bar{t}. The asymmetry in Higgs decay, normalized to the H -> t \bar{t} width, can reach the 6% percent level. In the gluon fusion process the corresponding normalized asymmetry is smaller by an order of magnitude. We present a crude estimate of this observable at the LHC.

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