Probing entanglement and testing Bell inequality violation with e + e − → τ + <mml:mrow…
2024; American Physical Society; Volume: 109; Issue: 3 Linguagem: Inglês
10.1103/physrevd.109.032005
ISSN2470-0037
AutoresK. Ehatäht, M. Fabbrichesi, Luca Marzola, Christian Veelken,
Tópico(s)Quantum Computing Algorithms and Architecture
ResumoWe present a feasibility study to probe quantum entanglement and Bell inequality violation in the process e + e − → τ + τ − at a center-of-mass energy of s = 10.579 GeV . The sensitivity of the analysis is enhanced by applying a selection on the scattering angle ϑ in the τ + τ − center-of-mass frame. We analyze events in which both τ leptons decay to hadrons, using a combination of decay channels τ − → π − ν τ , τ − → π − π 0 ν τ , and τ − → π − π + π − ν τ . The spin orientation of the τ leptons in these decays is reconstructed using the polarimeter-vector method. Assuming a dataset of 200 million τ + τ − events and accounting for experimental resolutions, we expect the observation of quantum entanglement and Bell inequality violation by the Belle-II experiment will be possible with a significance well in excess of five standard deviations. Published by the American Physical Society 2024
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