REVIEW 16 cited by
Probing entanglement and testing Bell inequality violation with $\textrm{e}^{+}\textrm{e}^{-} \rightarrow \tau^{+}\tau^{-}$ at Belle II
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Signed reviews
abstract
We present a feasibility study to probe quantum entanglement and Belle inequality violation in the process $\textrm{e}^{+}\textrm{e}^{-} \rightarrow \tau^{+}\tau^{-}$ at a center-of-mass energy of $\sqrt{s} = 10.579$ GeV. The sensitivity of the analysis is enhanced by applying a selection on the scattering angle $\vartheta$ in the $\tau^{+}\tau^{-}$ center-of-mass frame. We analyze events in which both $\tau$ leptons decay to hadrons, using a combination of decay channels $\tau^{-} \rightarrow \pi^{-}\nu_{\tau}$, $\tau^{-} \rightarrow \pi^{-}\pi^{0}\nu_{\tau}$, and $\tau^{-} \rightarrow \pi^{-}\pi^{+}\pi^{-}\nu_{\tau}$. The spin orientation of the $\tau$ leptons in these decays is reconstructed using the polarimeter-vector method. Assuming a dataset of $200$ million $\tau^{+}\tau^{-}$ 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.
Forward citations
Cited by 16 Pith papers
-
Qubit-qubit-qutrit quantum correlations in $H \to f \bar f V$
In h→τ^-τ^+ Z decays, the spin state is genuinely qubit-qubit-qutrit entangled almost everywhere, violates Bell inequalities throughout, and carries up to 1.95 bits of non-local magic.
-
High Energy Photon Polarimetry at Lepton Colliders: Quantum Information from Converted Photons
Converted photons in Belle II enable high-significance measurements of Bell nonlocality, discord, concurrence, magic and steerability for macroscopically separated GeV diphotons, provided opening-angle resolution reac...
-
Flavor--Kinetic Entanglement Production from Decay and Scattering at Finite Density
At finite density, the leading flavor-kinetic entanglement entropy equals twice the occupation-weighted branch-changing collision probability, and this quantity is used to diagnose first-order versus continuous therma...
-
Hadron Structure from the Hierarchy of Quantum Correlations in Deep-Inelastic Scattering
Quantum-information measures of the DIS final electron-quark state are shown to be sensitive to transversity PDFs and can discriminate between different tensor-charge extractions.
-
Quantum detection of CP violation in the $t\bar{t}$ system: production
CP-odd SMEFT top interactions appear as ΔB and antisymmetric C_A in the tt̄ production density matrix; direct markers beat most QI measures for CP sensitivity at LHC and FCC-ee.
-
Experimental prospects for quantum decoherence measurements at colliders
Hard final-state radiation measurably destroys the spin entanglement of fermion-antifermion pairs, and the effect should already be visible in LHC ttbar+jet and Belle II tau+tau-gamma data.
-
Quantum tomography beyond the leading order
NLO corrections to angular distributions can be subtracted as a background, allowing quantum tomography of H to ZZ to four leptons to be performed with the well-defined leading-order spin interpretation.
-
Quantum Entanglement Autodistillation in Baryon Pair Decays
Weak decays of spin-1/2 baryon-antibaryon pairs into a spin-1/2 baryon and a spin-0 meson can probabilistically increase the pair's spin entanglement, with the effect controlled by the decay asymmetry parameter alphaD.
-
Tests of quantum contextuality in particle physics
Spin states measured in collider data violate non-contextuality inequalities with significance above 5 sigma for several mesons, baryons, and top-quark pairs.
-
Bell Inequality Violation of Light Quarks in Back-to-Back Dihadron Pair Production at Lepton Colliders
Using dihadron fragmentation functions as spin analyzers, the paper shows that Bell inequality violation in massless quark pairs can be probed through azimuthal correlations, with projected discovery significance from...
-
The trace distance between density matrices, a nifty tool in new-physics searches
Using the trace distance between Standard Model and new-physics density matrices gives the strongest quantum-information bounds on anomalous top and tau couplings, along with first measurements of magic in collider data.
-
Measuring Quantum Discord at the LHC
The authors derive closed-form formulas for quantum discord in the ttbar system and predict it can be measured at the LHC with sub-percent precision using the kinematic method.
-
Quantum spin correlations in $Z^\prime$-mediated $t\bar{t}$ production at future lepton colliders
Quantum spin observables of t-bar-t pairs at future lepton colliders can distinguish chiral U(1)_X Z′ charge assignments, and polarized e−e+ beams isolate left- vs right-handed lepton couplings.
-
Entanglement redistribution of hyperon-antihyperon pair via sequential decay
In e+e−→ψ→Ξ(→Λπ)Ξ̄(→Λ̄π), the ΛΛ̄ pair's concurrence and negativity can decrease relative to the mother pair yet stay nonzero except at θ=0 and π, while quantum discord can always increase.
-
Testing spooky action between free-traveling electron-positron pairs
Simulations show that Bhabha scattering can produce electron-positron pairs with near-maximal entanglement, and a two-target secondary-scattering scheme could in principle measure their spin correlations.
-
Colliders are not Testing Locality via Bell's Inequality nor Providing an Unconditional Proof of Entanglement
Collider measurements of final-state momenta alone cannot certify Bell nonlocality or entanglement, because the measured angular distribution is itself a local hidden variable model.
Discussion (0). Continue with ORCID to comment.