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Probing CP Violation Via Higgs Decays to Four Leptons
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abstract
Since decays to four leptons is widely considered a promising way to search for the Higgs particle, we show how the same final state can also be used to search for signals of CP nonconservation. Energy asymmetries and triple correlations are related to parameters in the underlying CP violating effective interaction at the $H^0$-$W$-$W$ and $H^0$-$Z$-$Z$ vertex. Expected size of the effects are shown to be small for both the Sandard Model and its extension with an extra Higgs doublet.
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Cited by 1 Pith paper
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Probing P and CP Violations on the Cosmological Collider
A rolling axion-like coupling to a massive gauge boson generates a CP-odd imaginary trispectrum of primordial fluctuations, while local four-scalar EFT operators in exact de Sitter space produce no observable signal.
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