Multiquark states in the covariant quark confinement model

2013/01/21 by Mikhail A. Ivanov, Ivanov, Mikhail A.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #hep-ph #nucl-th

paper · pdf · doi:10.48550/arxiv.1301.4849

30 pages. Plenary talk at the XXI International Baldin Seminar on High Energy Physics Problems, September 10-15, 2012, JINR, Dubna, Russia

arxiv created 2013/01/21 · arxiv updated 2013/01/22

Abstract

This talk reviews the last applications of the covariant quark model for studying the properties of the multiquark states: B_s-meson (quark-antiquark state), light baryons (three-quark states) and tetraquark (four-quark state). The form factors of the B(B_s)-> P(V)-transitions are evaluated in the full kinematical region of momentum transfer squared. The widths of some B_s-nonleptonic decays are calculated. The static properties of the proton and neutron, and the Λ-hyperon (magnetic moments and charge radii) and the behavior of the nucleon form factors at low momentum transfers are described. The consequences of treating the X(3872) meson as a tetraquark bound state are explored. The decay widths of the observed channels X->J/ψ+2π(3π) and X-> D⁰ + D⁰+π⁰ via the intermediate off--shell states X-> J/ψ+ρ(ω) and X-> D + D^* are calculated. Its one-photon decay X-> γ+ J/ψis also analyzed.

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