X (3872) in QCD sum rules
AUTOR(ES)
Matheus, R. D.
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2007-03
RESUMO
QCD spectral sum rules is used 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, the current proposed recently by Maiani et al [1] is used, at leading order in alphas, considering the contributions of higher dimension condensates. The value M X = (3.94±0.11) GeV is found which is compatible, within the errors, with the experimental candidate X(3872). The uncertainties of our estimates are mainly due to the one from the c quark mass.
