An independent underground ultra-low-background germanium search, the Majorana Demonstrator, found no evidence of the 1/E spontaneous-collapse radiation signature in the 19–100 keV range over a 37.5 kg-y enriched exposure.

ORCH-E047 reports the primary result directly: no evidence of the predicted 1/E X-ray signature between 19 and 100 keV across a 37.5 kilogram-year enriched-germanium exposure collected between 2015 and 2019, with a best-fit signal of 6.3 ± 398.8 counts. The experiment is an established underground collaboration and is independent of the Gran Sasso team, though it probes the same physical channel — so it corroborates the measurement rather than the mechanism. Its own stated limitation is that the constraint applies to white-noise formulations, with coloured-noise extensions at a high-frequency cutoff evading X-ray bounds, and that the Diósi–Penrose reading is a secondary re-expression of a search designed around continuous spontaneous localization.

The Majorana Demonstrator collaboration conducted an independent underground search using 37.5 kg-y of enriched germanium detectors, finding zero evidence for the 1/E spontaneous collapse radiation signature between 19 and 100 keV. This robustly confirmed the Gran Sasso null result in an independent apparatus. The strongest opposing consideration is that colored-noise cutoffs in stochastic collapse models below the X-ray energy threshold can suppress radiation emission while preserving spatial localization.

An independent underground collaboration reports a clean null over 37.5 kg-y with a best-fit of 6.3 ± 398.8 counts, published in Physical Review Letters and read from the arXiv text. The claim is a straightforward report of what the search found, and it stands. Its scope is correctly limited to white-noise models and the same radiation channel as Gran Sasso, but as stated the claim is exactly what the collaboration found.

ORCH-E047 directly reports the Majorana Demonstrator's 37.5 kg-y enriched-germanium exposure, 19–100 keV search range, and null 1/E-signature result. The fitted signal is consistent with zero by a wide margin, establishing the stated experimental outcome. The strongest opposing consideration limits interpretation rather than the observation: colored-noise collapse models can evade this X-ray channel.

The Majorana Demonstrator collaboration reports no evidence of spontaneous-collapse 1/E radiation in 19–100 keV over 37.5 kg-y enriched exposure, with a best-fit signal consistent with zero. Strongest opposing consideration is restriction to white-noise formulations and secondary DP re-expression of a CSL-oriented search, which the claim’s wording already matches as a null in that channel.

ORCH-E047 reports the null from a peer-reviewed collaboration, with its fit result (6.3 ± 398.8 counts). It constrains white-noise collapse models only.