251 citations · 536 across the 11 of their papers we have counts for
11 papers
Doubly-heavy tetraquark bound states and resonances
Jean-Marc Richard, Alfredo Valcarce, Javier Vijande
We review the predictions of the quark model for the doubly-heavy tetraquarks . The possibility of resonances near the threshold in addition to a deeply boun…
Pentaquarks with anticharm or beauty revisited
J. -M. Richard, A. Valcarce, J. Vijande
We use a constituent model to analyze the stability of pentaquark configurations with a heavy antiquark or , and four light quarks , or…
Elusive multiquark spectroscopy
J. M. Richard
A review is presented of past and recent attempts to build multiquark states within current models already describing ordinary mesons and baryons. This includes: coherence in the c…
Four-quark stability
J. Vijande, A. Valcarce, J. -M. Richard +1
The physics of charm has become one of the best laboratories exposing the limitations of the naive constituent quark model and also giving hints into a more mature description of m…
Charmonium singlets, open charm and exotic hadrons
J. M. Richard
Caution is suggested on the comparison of the spin-singlet charmonium P-state with the centre of gravity of triplet states, when the mass splitting is of the order of a few MeV. Th…
Can the X(3872) be a 1^{++} four-quark state?
R. D. Matheus, S. Narison, M. Nielsen +1
We use QCD spectral sum rules to test the nature of the meson X(3872), assumed to be an exotic four-quark (c\bar{c}q\bar{q}) state with J^{PC}=1^{++}. For definiteness, we work wit…