To investigate the light scalar tetraquark candidate a0(980) (quantum numbers JP =0+), a correlation matrix including a variety of two- and four-quark interpolating operators has to be computed. We discuss efficient techniques to compute the elements of this correlation matrix, in particular diagrams with closed quark loops. Furthermore, we present evidence that such diagrams are not negligible given our precision, and their contribution is essential to obtain physically meaningful results. In particular, we find indications of the existence of an "additional" state around the two-particle thresholds of K+ K̄ and η +π, which could correspond to the a0(980) meson.
Berlin, J., A, A., Alexandrou, C., Dalla Brida, M., Finkenrath, J., Gravina, M., et al. (2016). Importance of closed quark loops for lattice QCD studies of tetraquarks. POS PROCEEDINGS OF SCIENCE, 128557.
Citazione: | Berlin, J., A, A., Alexandrou, C., Dalla Brida, M., Finkenrath, J., Gravina, M., et al. (2016). Importance of closed quark loops for lattice QCD studies of tetraquarks. POS PROCEEDINGS OF SCIENCE, 128557. | |
Tipo: | Articolo in rivista - Articolo scientifico | |
Carattere della pubblicazione: | Scientifica | |
Presenza di un coautore afferente ad Istituzioni straniere: | Si | |
Titolo: | Importance of closed quark loops for lattice QCD studies of tetraquarks | |
Autori: | Berlin, J; A, A; Alexandrou, C; Dalla Brida, M; Finkenrath, J; Gravina, M; Leontiou, T; Wagner, M | |
Autori: | ||
Data di pubblicazione: | 2016 | |
Lingua: | English | |
Rivista: | POS PROCEEDINGS OF SCIENCE | |
Appare nelle tipologie: | 01 - Articolo su rivista |
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