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A tale of three diagonalizations

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arxiv 2009.03990 v3 pith:32HS7E2W submitted 2020-09-06 hep-ph quant-ph

classification hep-phquant-ph
keywords diagonalizationproceduresthreeadditionanalyticalapplicationsariseautonne-takagi
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abstract

In addition to the diagonalization of a normal matrix by a unitary similarity transformation, there are two other types of diagonalization procedures that sometimes arise in quantum theory applications -- the singular value decomposition and the Autonne-Takagi factorization. In these pedagogical notes, we carry out each of these diagonalization procedures for the most general $2\times 2$ matrices for which the corresponding diagonalization is possible and provide explicit analytical results in each of the three cases.

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Cited by 1 Pith paper

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  1. Correlating Resonant Di-Higgs and Tri-Higgs Production to $H\to VV$ in the 2HDM

    hep-ph 2025-12 conditional novelty 6.0 of 10

    In the decoupling limit of the 2HDM, a heavy Higgs boson's decays to two Higgs bosons and to Z/W pairs are predicted to have a fixed ratio of about 9.5, independent of Yukawa and scalar-potential parameters.

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