Bell tests for collider decay processes

• URL: http://arxiv.org/abs/2609.09294v1
• Date: Tue, 08 Sep 2026 18:00:09 GMT
• Title: Bell tests for collider decay processes
• Abstract summary: We show that a Bell violation requires postselection, opening a loophole.<n>We derive a Bell inequality violated by singlet correlations when the effective spin-analyzing powers are sufficiently high.
• Score: 39.2511528914745
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose Bell tests for collider decays using independently sampled analysis axes as settings and detector regions to assign binary or null outcomes. We show that a Bell violation requires postselection, opening a loophole. However, under measurement independence and operational equivalence of acceptance events across settings, any local model exploiting the loophole must be nonclassical in the sense of measurement contextuality. We derive a Bell inequality violated by singlet correlations when the effective spin-analyzing powers are sufficiently high. Its violation then witnesses Bell nonlocality or measurement contextuality.

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