Study of the a_0(980) on the lattice

Abdou Abdel-Rehim; Carsten Urbach; Constantia Alexandrou; Giannis Koutsou; Luigi Scorzato; Marc Wagner; Mario Gravina; Mattia Dalla Brida

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Study of the a_0(980) on the lattice

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arxiv 1309.0850 v1 pith:NAHU3WTX submitted 2013-09-03 hep-lat hep-exhep-ph

Marc Wagner , Abdou Abdel-Rehim , Constantia Alexandrou , Mattia Dalla Brida , Mario Gravina , Giannis Koutsou , Luigi Scorzato , Carsten Urbach This is my paper · ORCID

classification hep-lathep-exhep-ph

keywords latticeadvancesapproachcomputationcreationdiagramsdiquark-antidiquarkdisconnected

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We present lattice results for the a_0(980) state using a variational approach with a variety of creation operators: quark-antiquark, mesonic molecule, diquark-antidiquark as well as two-meson type. Focus is put on recent technical advances, in particular the computation of singly disconnected diagrams.

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