Pair structure of heavy tetraquark systems

Investigation of light and heavy tetraquark candidates using lattice QCD

We review the status of an ongoing long-term lattice investigation of the spectrum and structure of tetraquark candidates. We focus on the light scalar meson a0(980). First steps regarding the study of a possibly existing ccc̄c̄ tetraquark are also outlined.

The structure of a pair of nilpotent Lie algebras

Assume that $(N,L)$, is a pair of finite dimensional nilpotent Lie algebras, in which $L$ is non-abelian and $N$ is an ideal in $L$ and also $mathcal{M}(N,L)$ is the Schur multiplier of the pair $(N,L)$. Motivated by characterization of the pairs $(N,L)$ of finite dimensional nilpotent Lie algebras by their Schur multipliers (Arabyani, et al. 2014) we prove some properties of a pair of nilpoten...

Investigating the Tetraquark Structure of the New Mesons

Using the QCD sum rule approach we investigate the vertex associated with the decay D0(0+) → D+π−, where the scalar meson D0(0+) is considered as a four-quark state (cd)(ūd̄). Although our results for the mass and partial decay width are smaller than the mass and the total decay width of the broad scalar meson D∗0 0 (2308) reported by BELLE Collaboration, we can not discard the possibility that ...

Schur-Pair Property and the Structure of Varietal Covering Groups

Resonance Model for Pair Correlations in Heavy Fermion Systems

The free energy and static spin-correlation function of a two site resonance model akin to the single site Schotte model are calculated. Thermodynamic functions are discussed and model parameters are linked to those of the microscopic two site Kondo model. Introduction Free energy and thermodynamics Single site resonance (SSR-) models [I, 21 are employed to generate analytical expressions for t...