Lattice investigation of the tetraquark candidates a0(980) and kappa
- It is a long discussed issue whether light scalar mesons have sizeable four-quark components. We present an exploratory study of this question using Nf = 2+1+1 twisted mass lattice QCD. A mixed action approach ignoring disconnected contributions is used to calculate correlatormatrices consisting of mesonic molecule, diquark-antidiquark and two-meson interpolating operators with quantum numbers of the scalar mesons a0(980) (1(0++)) and k (1/2(0+)). The correlation matrices are analyzed by solving the generalized eigenvalue problem. The theoretically expected free two-particle scattering states are identified, while no additional low lying states are observed. We do not observe indications for bound four-quark states in the channels investigated.
| Author: | Jan Oliver Daldrop, Carsten UrbachORCiDGND, Constantia AlexandrouORCiDGND, Mario Gravina, Mattia Dalla BridaORCiDGND, Luigi Scorzato, Marc WagnerORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-274866 |
| ISSN: | 1824-8039 |
| ArXiv Id: | http://arxiv.org/abs/1211.5002 |
| Parent Title (English): | Proceedings of Science |
| Publisher: | Scuola Internazionale Superiore di Studi Avanzati |
| Place of publication: | Trieste |
| Document Type: | Conference Proceeding |
| Language: | English |
| Year of Completion: | 2012 |
| Year of first Publication: | 2012 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Creating Corporation: | European Twisted Mass Collaboration |
| Release Date: | 2012/12/14 |
| Volume: | 2012 |
| Page Number: | 7 |
| First Page: | 1 |
| Last Page: | 7 |
| Note: | The 30th International Symposium on Lattice Field Theory June 24 – 29, 2012 Cairns, Australia |
| HeBIS-PPN: | 416425453 |
| Institutes: | Physik / Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - Namensnennung-Keine kommerzielle Nutzung-Weitergabe unter gleichen Bedingungen |
