# n104 — the antimatter prediction sheet (2026-07-10)
# Five predictions, each descending from a theorem or a measured
# structure; one converts kaon physics into a probe of the pump.

## P-A1 — THE ANTI-KNEE IS THE KNEE
The audit is C-even: decoherence physics is sublattice-blind.
Antimatter superpositions have EXACTLY matter's decoherence budget —
same dark-state silence at rest, same Lorentzian, same knee frequency.
As anti-atom interferometry matures (AEgIS-class antihydrogen beams),
its contrast budgets will close like matter's. Kill: any confirmed
matter/antimatter decoherence asymmetry — it would break the C-even
audit outright.

## P-A2 — THE ORDERING: WHERE ANTIMATTER SURPRISES ARE ALLOWED
The asymmetric equivalence principle, applied to the antimatter
program: clock-type observables (ALPHA 1S-2S, hyperfine, any
spectroscopy) can NEVER show an anomaly — dark states protect spectra
structurally; force-type observables (ALPHA-g, GBAR free fall) are
where any anomaly is allowed in principle. The framework hands the
antimatter community a search ordering: put precision into
gravimetry, not spectroscopy, if you hunt new physics. Kill: a
confirmed antimatter CLOCK anomaly with intact free-fall — the exact
mirror of the framework's general clock-EP stance.

## P-A3 — POSITRONIUM, THE PERFECT STRADDLER
Ps is half matter, half antimatter — a dressing symmetric across both
sublattices. Predictions: (i) its C-parity is protected from the
vacuum side — C-forbidden decays (o-Ps -> 2gamma, 4gamma...) remain
null at the vacuum level forever (current bounds ~1e-6: rolling);
(ii) Ps falls at exactly g (smooth consumption is sublattice-blind) —
the proposed Ps free-fall experiments will find ordinary gravity;
(iii) as a neutral composite it carries the r^-3.5 residual channel,
in principle its only non-gravitational long-range handle.

## P-A4 — THE PUMP IS C-SYMMETRIC TO EIGHTEEN DIGITS (new card entry)
If the pump's microphysics broke sublattice symmetry, the two classes'
maintenance costs would differ: a universal matter/antimatter mass
offset. Kaon CPT interferometry bounds |m(K0)-m(K0bar)|/m < 6e-19.
THEREFORE: the pump's C-asymmetry < ~1e-18 — the sharpest constraint
on the pump to date, in a direction LLR (stability, 1e-14/yr) cannot
see. The n103 open flag ("a C-breaking pump as baryogenesis source")
is thereby nearly closed: whatever made the universe prefer matter,
it was not the pump's bookkeeping — at least not above one part in
1e18. Card updated.

## P-A5 — flagged lean, not a numbered prediction
Cosmic antihelium (the AMS-02 candidate events): the framework's
vacuum provides no antimatter-domain mechanism and its audit forbids
none — confirmation would demand matter-sector CP physics outside the
framework's reach. Recorded as a boundary statement: anti-He
confirmation would not kill the framework, but would prove the
missing matter sector holds the entire baryogenesis story. No stance
wagered.

## The sheet's balance
Two structural nulls with running experiments (A1, A3i), one search
ordering handed to an active community (A2), one new eighteen-digit
parameter bound harvested from existing kaon data (A4), one honest
boundary (A5). The antimatter program — BASE, ALPHA, ALPHA-g, GBAR,
AEgIS, Ps spectroscopy — becomes, on this reading, a standing test
bench of the audit's C-evenness: every year it finds nothing, the
other sublattice stays exactly as expensive as ours.