Speaker
Joshua Berlin
(University of Frankfurt)
Description
The structure of the light-scalar meson a_0(980) is under debate. It might be of quark-antiquark, diquark-antidiquark or mesonic molecule type. We have implemented corresponding interpolating field operators composed of two and of four quarks, as well as operators of two-meson type, to study the structure of a_0(980). The computation of the correlation matrix is rather challenging, because of e.g. closed fermion loops, quark propagation within a timeslice or disconnected pieces. To keep the statistical errors on an acceptable level, one needs to resort to different techniques for different entries and diagrams of the correlation matrix. Here we discuss these techniques in the context of first numerical results.
Primary author
Joshua Berlin
(University of Frankfurt)
Co-authors
Abdou Abdel-Rehim
(Cyprus Institute)
Constantia Alexandrou
(Cyprus Institute)
Giannis Koutsou
(Cyprus Institute)
Marc Wagner
(University of Frankfurt)
Mario Gravina
(Università della Calabria)
Mattia Dalla Brida
(Trinity College Dublin)
