International Workshop on Future Linear Colliders, LCWS2024

Prospects of measuring quantum entanglement in H->tautau at a future e+e- Higgs factory

9 Jul 2024, 09:50

20m

Ito Hall (Ito International Research Center)

Oral presentation (in person) Higgs, Electro-Weak Higgs, Electroweak

Speaker

Mr Cedric Breuning (University of Bonn)

Description

Final states with spin-correlations allow the measurement of quantum entanglement at collider energies. The $H\to \tau \tau$ process is an excellent probe for this, due to the scalar nature of the Higgs boson, and the direct access to the $\tau$-lepton helicity through the angular distributions of the $\tau$-lepton decay products. We will present the prospects of such a measurement a future $e^{+}{e}^{-}$ Higgs factory using Delphes simulation samples for the signal and the relevant background processes. The construction of observables sensitive to quantum entanglement of the $\tau$-$\tau$ system will be discussed together with the impact of reconstruction and event selection effects on the sensitivity.

Presentation materials

tautau_QuantumEntanglement.pdf

Peer reviewing

Paper

Accepted on 28 Nov 2024 by Junping Tian

Paper files:

• Breuning_etal_Publication_Right.pdf
• Breuning_etal_tautauQuantumEntanglement.pdf