Glueballs, hybrids and multiquark states are predicted as bound states in models guided by
quantum chromo dynamics (QCD), by QCD sum rules or QCD on a lattice. Estimates for the …

Lots of charmonium-like structures have been observed in the last two decades. Most of
them have quantum numbers that can be formed by a pair of charm and anticharm quarks …

The search for mesons with non-quark-antiquark (exotic) quantum numbers has gone on for
nearly 30 years. Currently there is experimental evidence of three isospin one states, the π 1 …

The primary objective of this study is to investigate hadronic molecules of K⁎ K¯ 1 (1270)
using a one-boson-exchange model, which incorporates exchanges of vector and …

We calculated next-to-leading-order (NLO) QCD perturbative contributions to a JPC= 0+-,
dud¯ u¯ tetraquark (diquark-antidiquark) correlator in the chiral limit of massless u and d …

We study the large N c behavior of couplings among light meson states with different
compositions in terms of quarks and gluons. We shortly review the most common …

The color fields created by the static tetraquark system are computed in quenched SU (3)
lattice QCD, in a 24 3× 48 lattice at β= 6.2 corresponding to a lattice spacing a= 0.07261 (85) …

We study the exotic JPC= 0--four-quark states in Laplace sum rules and finite energy sum
rules. We use the vector tetraquarklike currents as interpolating currents in the correlator …

A bstract We calculate the coefficients of the dimension-8 quark and gluon condensates in
the current-current correlator of 1−+ light hybrid current\(g\overline {q}(x){\gamma} _ {\nu} i …

The bottom-charmed meson spectrum is studied via an effective version of the Coulomb
gauge QCD Hamiltonian. The Tamm-Dancoff approximation is employed to estimate the …