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With an additional approximation U_{23}^{e} = 0, the FX phase becomes highly simplified, reducing to a sum of the neutrino-intrinsic FX phase δ^ν_FX and the contribution from the relative phase ρ'_1 - ρ'_2."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"The approximations U_{13}^e = 0 and U_{23}^e = 0, where the 1-3 and 2-3 elements of the charged-lepton diagonalization matrix are neglected; these are invoked to obtain the compact expression for δ_FX."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"Under the approximations U13^e = 0 and U23^e = 0, the Fritzsch-Xing CP phase equals the sum of the neutrino-intrinsic phase and the relative phase between the first two generations."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"An explicit rephasing transformation converts any unitary mixing matrix to the Fritzsch-Xing parametrization, and under the approximations U13^e=0 and U23^e=0 the FX phase simplifies to the sum of the neutrino-intrinsic phase and the 1-2 re"}],"snapshot_sha256":"8d6e5371e54e3fb580b17fc0ecff15a1ca76dbc17b17bf50a8c2c40077ab173e"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"In this paper, we construct an explicit rephasing transformation that converts an arbitrary unitary mixing matrix into the Fritzsch--Xing (FX) parametrization, which is obtained by trivializing arguments of the matrix elements in the third row and third column. 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