Abstract
We consider the recently suggested model for some resonances near the open charm threshold as bound states of charmonium inside excited light mesons. It is argued in the soft-wall holographic model of QCD that such states of heavy quarkonium necessarily exist at sufficiently large spin of the light meson. The bound state is provided by the dilaton exchange through the 5D bulk. We also argue that the decay of such bound systems into mesons with open heavy flavors due to splitting of the heavy quarkonium can be treated as semiclassical tunneling and is suppressed. This behavior is in agreement with the known relative suppression of the decay of the discussed charmonium-like resonances into channels with D mesons.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 82-86 |
| Number of pages | 5 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 671 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 12 2009 |
Bibliographical note
Funding Information:The work of S.D. and M.B.V. is supported in part by the DOE grant DE-FG02-94ER40823. The work of A.G. is supported in part by the grants RFBR-06-02-17382, INTAS-1000008-7865, PICS-07-0292165. A.G. acknowledges the warm hospitality at the William I. Fine Theoretical Physics Institute where this work was done.