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New a(1)(1420) state: structure, mass, and width
(American Physical Society, 2018-03)
The structure, spectroscopic parameters and width of the resonance with quantum numbers J(PC) = 1(++) discovered by the COMPASS Collaboration and classified as the a(1)(1420) meson are examined in the context of QCD sum ...
The structure, mixing angle, mass and couplings of the light scalar f(0)(500) and f(0)(980) mesons
The mixing angle, mass and couplings of the light scalar mesons f(0)(500) and f(0)(980) are calculated in the framework of QCD two-point sum rule approach by assuming that they are tetraquarks with diquark-antidiquark ...