Laboratory-frame tests of quantum entanglement in $H \to WW$
- URL: http://arxiv.org/abs/2209.14033v2
- Date: Thu, 27 Apr 2023 06:21:44 GMT
- Title: Laboratory-frame tests of quantum entanglement in $H \to WW$
- Authors: J. A. Aguilar-Saavedra
- Abstract summary: Quantum entanglement between the two $W$ bosons resulting from the decay of a Higgs boson may be investigated in the dilepton channel $H to WW to ell nu ell nu$
The dilepton invariant mass distribution, already measured by the ATLAS and CMS Collaborations at the LHC, can be used to observe the quantum entanglement of the $WW$ pair.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum entanglement between the two $W$ bosons resulting from the decay of a
Higgs boson may be investigated in the dilepton channel $H \to WW \to \ell \nu
\ell \nu$ using laboratory-frame observables that only involve the charged
leptons $\ell=e,\mu$. The dilepton invariant mass distribution, already
measured by the ATLAS and CMS Collaborations at the LHC, can be used to observe
the quantum entanglement of the $WW$ pair with a statistical sensitivity of
$7\sigma$ with Run 2 data, and of $6\sigma$ when including theoretical
systematics. As a by-product, the relation between $W$ rest frame
(four-dimensional) angular distributions, $H \to WW$ decay amplitudes, and spin
correlation coefficients, is written down.
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