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Static-light meson-meson potentials

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arxiv 1011.0571 v1 pith:IX4NAKX4 submitted 2010-11-02 hep-lat

Gunnar Bali , Martin Hetzenegger This is my paper · ORCID
classification hep-lat
keywords approximprovedlatticepotentialsstatic-lightactionsall-to-allanalysis
verification ladder T0 review T1 audit T2 compute T3 formal
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We investigate potentials between pairs of static-light mesons in Nf=2 Lattice QCD, in different spin channels. The question of attraction and repulsion is particularly interesting with respect to the X(3872) charmonium state and charged candidates such as the Z+(4430). We employ the nonperturbatively improved Sheikholeslami-Wohlert fermion and the Wilson gauge actions at a lattice spacing a approx. 0.084 fm and a pseudoscalar mass mPS approx. 760 MeV. We use stochastic all-to-all propagator techniques, improved by a hopping parameter expansion. The analysis is based on the variational method, utilizing various source and sink interpolators.

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  1. Lattice perspectives on doubly heavy tetraquarks

    hep-lat 2025-02 accept novelty 1.0 of 10

    A review of lattice QCD results concludes that doubly heavy tetraquarks Tbb(ud/us) are firmly predicted as bound states, Tcc appears as a virtual state at nonphysical masses, and Tbc is under active study.

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