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Now showing items 1-10 of 17

#### 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 ...

#### Testing the doubly charged charm-strange tetraquarks

(Springer, 2018-02-19)

The spectroscopic parameters and decay channels of the doubly charged scalar, pseudoscalar and axial-vector charm-strange tetraquarks Z((c) over bars) = [sd][(uc) over bar] are explored within framework of the QCD sum rule ...

#### Mass and residue of Lambda(1405) as hybrid and excited ordinary baryon

(Springer, 2018-03)

The nature of the Lambda(1405) has been a puzzle for decades, whether it is a standard three-quark baryon, a hybrid baryon or a baryon-meson molecule. More information on the decay channels of this particle and its strong, ...

#### Strong decay of P-c (4380) pentaquark in a molecular picture

(Elsevier, 2018-07-10)

There are different assumptions on the substructure of the pentaquarks P-c(4380) and P-c(4450), newly founded in J/psi N invariant mass by the LHCb Collaboration, giving consistent mass results with the experimental ...

#### Probing an axial-vector tetraquark Z(s) via its semileptonic decay Z(s) -> X(4274)(I)over-bar nu(I)

(Springer, 2018-07)

The semileptonic decays of the open charm-bottom axial-vector tetraquark Z(s) = [cs][(b) over bar(s) over bar] to X(4274) (l) over bar nu(l) = e, mu, tau are explored by means of the QCD three-point sum rule method. Both ...

#### Analysis of the structure of Xi (1690) through its decays

(Springer, 2018-05)

The mass and pole residue of the first orbitally and radially excited Xi state as well as the ground state residue are calculated by means of the two-point QCD sum rules. Using the obtained results for the spectroscopic ...

#### The structure, mixing angle, mass and couplings of the light scalar f(0)(500) and f(0)(980) mesons

(Elsevier, 2018-06)

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 ...

#### Nature of the Ω (2012) through its strong decays

(Springer, 2018)

We extend our previous analysis on the mass of the recently discovered Ω (2012) state by investigation of its strong decays and calculation of its width employing the method of light cone QCD sum rule. Considering two ...

#### Structure of the Ξb (6227)- resonance

(American Physical Society, 2018)

We explore the recently observed Ξbð6227Þ− resonance to fix its quantum numbers. To this end, we consider various possible scenarios: It can be considered as either a 1P or 2S excitation of the Ξ−b and Ξ0bð5935Þ ground-state ...

#### Resonance Y(4660) as a vector tetraquark and its strong decay channels

(American Physical Society, 2018-09)

The spectroscopic parameters and partial widths of the strong decay channels of the vector meson Y(4660) are calculated by treating it as a bound state of a diquark and antidiquark. The mass and coupling of the JPC=1 - ...