Fall-apart decays of polyquark hadrons
| dc.creator | Melikhov, Dmitri | |
| dc.creator | Stech, Berthold | |
| dc.date | 2006-06-19 | |
| dc.date | 2006-08-30 | |
| dc.date.accessioned | 2026-07-07T10:41:46Z | |
| dc.date.available | 2026-07-07T10:41:46Z | |
| dc.description | We analyse fall-apart decays of poliquark (tetra, penta and molecule type) hadrons within the constituent quark picture. For processes in which a poliquark hadron goes to final states containing a light pseudoscalar meson the constraints given by chiral symmetry are implemented. As an application of the approach developed, fall-apart decays of $a(980)$ and X(3872) are studied, assuming these mesons are poliquark hadrons. Two extreme options - confined diquark-diquark states and molecular states - are considered. For $a^0(980)$, the observed width can be obtained assuming that this meson is a diquark-diquark composite with a relatively large size of around $1÷1.5$ fm. The pure $K \bar K $ molecular-type state, however, can be excluded. For the X(3872), a sufficiently small width can be obtained if it is a dominantly isospin-0 diquark-diquark composite with a very large size of $\ge 2.5$ fm. The pure molecular option appears possible if the binding energy is tiny, $E_b\lesssim 0.2$ MeV, corresponding to a huge size. | |
| dc.description | 19 pages, discussion of the parameters used is added on page 5, version published in Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0606203 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0606203 | |
| dc.identifier | Phys.Rev.D74:034022,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.034022 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/181728 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Fall-apart decays of polyquark hadrons | |
| dc.type | text |