https://doi.org/10.1140/epjc/s10052-008-0754-8
Regular Article - Theoretical Physics
Excited heavy tetraquarks with hidden charm
1
Bogoliubov Laboratory for Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russia
2
Institut für Physik, Humboldt–Universität zu Berlin, Newtonstr. 15, 12489, Berlin, Germany
3
Dorodnicyn Computing Centre, Russian Academy of Sciences, Vavilov Str. 40, 119991, Moscow, Russia
* e-mail: galkin@physik.hu-berlin.de
Received:
29
August
2008
Published online:
25
October
2008
The masses of the excited heavy tetraquarks with hidden charm are calculated within the relativistic diquark–antidiquark picture. The dynamics of the light quark in a heavy–light diquark is treated completely relativistically. The diquark structure is taken into account by calculating the diquark–gluon form factor. New experimental data on charmonium-like states above open charm threshold are discussed. The obtained results indicate that X(3872), Y(4260), Y(4360), Z(4248), Z(4433) and Y(4660) could be tetraquark states with hidden charm.
PACS: 12.40.Yx – / 14.40.Gx – / 12.39.Ki –
© Springer-Verlag , 2008
