Matter Antimatter Asymmetry

Matter–Antimatter Asymmetry as the Unique Admissible Reconstruction of Persistent Cosmological IdentityExchangeability Non-Transportability under Irreversible Cosmological Continuation This paper presents a structural reconstruction theorem for matter–antimatter asymmetry within the AASC (Admissible Construction under Scope Constraints) framework. The work does not propose: a new baryogenesis mechanism, a modification of Standard-Model dynamics, a new CP-violation model, or a phenomenological prediction for the baryon-to-photon ratio. Instead, it studies a narrower question: Under what conditions can exact matter–antimatter exchangeability remain a lawful same-domain invariant once cosmological evolution becomes irreversible and persistent material identity must be reconstructed across time? Core Result The paper proves that: once a cosmological history is treated as a coherent construction of persistent material identity, and irreversible continuation is present, exact global matter–antimatter exchangeability becomes non-transportable as a standing-preserving invariant. Under these conditions: persistent asymmetry is not introduced as an arbitrary preference, but emerges as a reconstruction necessity of the admissible continuation structure itself. Main Structural Contributions The manuscript develops: a finite cosmological reconstruction category CBARC_{\mathrm{BAR}}CBAR, admissible reconstruction morphisms, witness-preserving equivalence classes, a universal admissible quotient QBARQ_{\mathrm{BAR}}QBAR, a persistent-carrier witness category, and a nonvanishing exchangeability-totalization obstruction object Oex\mathcal{O}_{\mathrm{ex}}Oex. It then proves: universal factorization through the admissible quotient, no exact symmetric persistent continuation, exchangeability transport obstruction under irreversible continuation, and exhaustion of same-scope reconstruction escape routes. Reconstruction-Obstruction Framework The paper formalizes: hidden reindexing, post-hoc symmetry restoration, recoverability repair, carrier laundering, selector insertion, and scope transport as explicit obstruction classes inside the reconstruction category. Every same-scope attempt to preserve exact exchangeability is shown to collapse into: bookkeeping equivalence, inadmissible selector import, recoverability failure, or larger-domain scope change. Relation to Standard Cosmology The paper does not replace: electroweak baryogenesis, leptogenesis, asymmetric reheating, Sakharov conditions, or conventional freeze-out physics. Instead, these are reinterpreted structurally as: possible dynamical realizationsof the persistent asymmetry required by admissible cosmological continuation. Conceptual Position This work is a: structural cosmology paper, reconstruction theorem, and admissibility/continuation obstruction analysis, rather than a phenomenological particle-physics model. The framework functions as a constraint architecture: identifying which continuation structures are admissible, which reconstruction classes survive, and which exact symmetries fail under irreversible identity-preserving evolution. This paper is downstream of: Minimal Conditions for Admissible Construction The Structure of Admissibility