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- W4287991509 abstract "A Wilsonian approach to $pipi$ scattering based in the Glazek-Wilson Similarity Renormalization Group (SRG) for Hamiltonians is analyzed in momentum space up to a maximal CM energy of $sqrt{s}=1.4$ GeV. To this end, we identify the corresponding relativistic Hamiltonian by means of the 3D reduction of the Bethe-Salpeter equation in the Kadyshevsky scheme, introduce a momentum grid and provide an isospectral definition of the phase-shift based on a spectral shift of a Chebyshev angle. We also propose a new method to integrate the SRG equations based on the Crank-Nicolson algorithm with a single step finite difference so that isospectrality is preserved at any step of the calculations. We discuss issues on the unnatural high momentum tails present in the fitted interactions and reaching far beyond the maximal CM energy of $sqrt{s}=1.4$ GeV and how these tails can be integrated out explicitly by using Block-Diagonal generators of the SRG." @default.
- W4287991509 created "2022-07-26" @default.
- W4287991509 creator A5068400227 @default.
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- W4287991509 date "2019-12-19" @default.
- W4287991509 modified "2023-10-16" @default.
- W4287991509 title "$pipi$ scattering in a renormalized Hamiltonian matrix" @default.
- W4287991509 doi "https://doi.org/10.48550/arxiv.1912.09248" @default.
- W4287991509 hasPublicationYear "2019" @default.
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