251 citations · 329 across the 3 of their papers we have counts for
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hep-ph2006★ 251 cited
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…
hep-ph2006★ 65 cited
Chromomagnetism, flavour symmetry breaking and S-wave tetraquarks
Franco Buccella, Hallstein Hogaasen, Jean-Marc Richard +1
The chromomagnetic interaction, with full account for flavour-symmetry breaking, is applied to S-wave configurations containing two quarks and two antiquarks. Phenomenological impl…