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- W4317543140 abstract "We discuss quantum entanglement and violation of Bell inequalities in the $Hrightarrow ZZ$ decay, in particular when the two $Z-$bosons decay into light leptons. Although such process implies an important suppression of the statistics, this is traded by clean signals from a quasi maximally-entangled system, which makes it very promising to check these crucial phenomena at high energy. In this paper we devise a novel framework to extract from $H to ZZ$ data all significant information related to this goal, in particular spin correlation observables. In this context we derive sufficient and necessary conditions for entanglement in terms of only two parameters. Likewise, we obtain a sufficient and improved condition for the violation of Bell-type inequalities. The numerical analysis shows that with a luminosity of $L = 300 text{fb}^{-1}$ entanglement can be probed at $> 3sigma$ level. For $L = 3 text{ab}^{-1}$ (HL-LHC) entanglement can be probed beyond the $5sigma$ level, while the sensitivity to a violation of the Bell inequalities is at the $4.5sigma$ level" @default.
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- W4317543140 date "2023-01-20" @default.
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- W4317543140 title "Testing entanglement and Bell inequalities in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>H</mml:mi><mml:mo stretchy=false>→</mml:mo><mml:mi>Z</mml:mi><mml:mi>Z</mml:mi></mml:math>" @default.
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- W4317543140 doi "https://doi.org/10.1103/physrevd.107.016012" @default.
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