TY  - CONF
A1  - Daldrop, Jan Oliver
A1  - Urbach, Carsten
A1  - Alexandrou, Constantia
A1  - Gravina, Mario
A1  - Dalla Brida, Mattia
A1  - Scorzato, Luigi
A1  - Wagner, Marc
T1  - Lattice investigation of the tetraquark candidates a0(980) and kappa
T2  - Proceedings of Science
N2  - 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.
Y1  - 2012
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/27486
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-274866
SN  - 1824-8039
N1  - The 30th International Symposium on Lattice Field Theory June 24 – 29, 2012 Cairns, Australia
VL  - 2012
SP  - 1
EP  - 7
PB  - Scuola Internazionale Superiore di Studi Avanzati
CY  - Trieste
ER  -