Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

Heavy hadron spectroscopy in a Salpeter model with AdS/QCD inspired potential

Jul 16, 2009, 4:50 PM
20m
Exhibition room B (Kraków, Poland)

Exhibition room B

Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
QCD in hadronic physics VI. QCD in Hadronic Physics

Speaker

Floriana Giannuzzi (University of Bari and INFN)

Description

The quark-antiquark potential obtained in a gauge/gravity (AdS/QCD) approach is inserted in a Salpeter equation to determine heavy hadron masses. The parameters of the model are fixed fitting the known spectrum of the $S$-wave mesons in the sector of heavy-light quarks, charmonium and bottomonium. The predicted mass of $\eta_b$ is in agreement with the subsequent observation by BaBar Collaboration. A discussion of heavy tetraquark masses is also presented, motivated by the possibility of a diquark-antidiquark structure for some states. The decay constants of charmonium and bottomonium are determined: they control the processes $\eta (nS)_{c/b}\rightarrow\gamma\gamma$ and $\psi(nS)/\Upsilon(nS)\rightarrow \ell\bar \ell$. Finally, the masses of baryons comprising two heavy quarks are computed in the same model, assuming a quark-diquark scheme; these states are predicted to exist by the quark model, but so far there is only one experimental candidate, $\Xi_{cc}$, observed by the Selex Collaboration. based on: Eur.\ Phys.\ J.\ C {\bf 57}, 569 (2008) Phys.\ Rev.\ D {\bf 78}, 117501 (2008) arXiv:0902.4624 [hep-ph], to appear on Phys.\ Rev.\ D {\bf 79}, 094002 (2009)

Primary author

Floriana Giannuzzi (University of Bari and INFN)

Presentation materials