Speaker
Ms
Antje Peters
(Goethe-Universität Frankfurt am Main)
Description
We explore the possible existence of qq-anti-b-anti-b tetraquark
states, where qq denotes two up/down, strange or charm quarks. To this end we compute potentials of two static antiquarks in the presence of the two quarks qq of finite mass using lattice QCD. Then we check, whether these potentials are sufficiently attractive to host bound states. We find strong indication for a bound four-quark state for qq=(ud-du)/\sqrt{2}, i.e. isospin I=0. At the same time there is clear evidence against the existence of qq-anti-b-anti-b tetraquarks with strange or charm flavor or isospin I=1.
Primary author
Ms
Antje Peters
(Goethe-Universität Frankfurt am Main)
Co-authors
Mr
Björn Wagenbach
(Goethe University Frankfurt/Main)
Dr
Krzysztof Cichy
(Goethe University Frankfurt)
Prof.
Marc Wagner
(Goethe University Frankfurt/Main)
Pedro Bicudo
(IST, Univ. Lisboa)
