Inclusion of heavy spin effects in the u d b b I(J^P)=0(1^-) four-quark channel in the Born-Oppenheimer approximation

2022/11/28 by Hoffmann, Jakob, Zimermmane-Santos, André, Wagner, Marc
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2211.15765

Abstract

We refine our previous study of a u d b b tetraquark resonance with quantum numbers I(J^P)=0(1^-), which is based on antiheavy-antiheavy lattice QCD potentials, by including heavy quark spin effects via the mass difference of the B and the B^* meson. This leads to a coupled channel Schrödinger equation, where the two channels correspond to BB and B^*B^*, respectively. We search for T matrix poles in the complex energy plane, but do not find any indication for the existence of a tetraquark resonance in this refined coupled channel approach. We also vary the antiheavy-antiheavy potentials as well as the b quark mass to further understand the dynamics of this four-quark system.

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