QCD Corrections to Decay Distributions of Neutral Higgs Bosons with (In)definite CP Parity

Details QCD Corrections to Decay Distributions of Neutral Higgs Bosons with (In)definite CP Parity QCD Corrections to Decay Distributions of Neutral Higgs Bosons with (In)definite CP Parity

1997-01-22

arxiv.org/abs/hep-ph/9701347v1

Phys.Rev. D56 (1997) 90-99

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, REVTeX, uses: psfig,amssym,aps,preprint 14 ps figures

Scientific paper

10.1103/PhysRevD.56.90

We compute the order $\alpha_s$ QCD corrections to the density matrix for the decay of a neutral Higgs boson $\phi$ with (in)definite CP parity into a quark antiquark pair, respectively the QED corrections for the decay into a pair of charged leptons. We classify and calculate single spin asymmetries and spin-spin correlations which are generated by the scalar and pseudoscalar Yukawa couplings. These spin effects can be traced in $\phi \to \tau^-\tau^+$ and, for heavy Higgs bosons, in $\phi \to t\bar{t}$. We also calculate resulting correlations among the final states and estimate, for the respective decay modes, the number of events needed to measure the Yukawa couplings with these correlations at the 3 sigma level.

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