Antimatter universes, including afterimage-like universes, may be discovered by your scientists “within a short time,” but this discovery will not be accepted.

ALPHA or AEgIS is relevant only if the model predicts anomalies in laboratory antihydrogen: define ηg = g_antihydrogen/g_hydrogen − 1 and δν = (ν_antihydrogen − ν_hydrogen)/ν_hydrogen. Accumulating 10^4–10^5 usable antihydrogen events over 3–5 years is proposed, with targets of σ_ηg ≤ 0.01 and σ_δν ≤ 10^-6, respectively, subject to engineering justification. Blind the magnetic-field corrections and control temperature, field gradients, and spectral line shapes. The former target corresponds to a comparison of g at approximately 1% precision, and the latter to hyperfine frequency precision of approximately 1.4 kHz. The relationships between these deviations and cross-universe coupling parameters must be derived in advance; otherwise, even an observed anomaly cannot test this universe hypothesis. “Discovered within a short time but not accepted” should be examined separately through historical research using a predefined time window, independent replication, and criteria for acceptance by the scientific community. The original statement currently provides none of these definitions.

Joint Constraints on Antihydrogen Free Fall and Hyperfine Symmetry in a Hidden-Sector Coupling Model

Another antimatter universe would not itself overturn CPT or the weak equivalence principle. Only explicitly predicted and confirmed deviations in spectroscopy or free fall would revise the corresponding symmetry assumptions.

ALPHA Collaboration，Antihydrogen Laser Physics Apparatus，欧洲核子研究中心; AEgIS Collaboration，Antimatter Experiment: Gravity, Interferometry, and Spectroscopy，欧洲核子研究中心：[项目介绍](https://aegis.web.cern.ch/about.php)

No discovery deadline, criteria for identifying a universe, or definition of “not accepted” is provided, nor does the statement predict that antihydrogen will exhibit antigravity or any particular spectral deviation.

As of the search date, no independently confirmed discovery of an antimatter universe was found. This is an unfulfilled historical prediction with an ambiguous deadline. Neither the laboratory discovery of antimatter nor any controversial paper can count as its fulfillment, and normal ALPHA results cannot exclude all second-universe models.