6533b7d2fe1ef96bd125e39d
RESEARCH PRODUCT
A lattice investigation of exotic tetraquark channels
Kim MaltmanR. J. HudspithRandy LewisAnthony FrancisBrian Colquhounsubject
PhysicsParticle physics010308 nuclear & particles physicsHigh Energy Physics - Lattice (hep-lat)FOS: Physical scienceshep-lathep-phParticle Physics - Lattice01 natural sciencesHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics - LatticeLattice (order)0103 physical sciencesBound stateTetraquark010306 general physicsParticle Physics - Phenomenologydescription
We perform an $n_f=2+1$ lattice study of a number of channels where past claims exist in the literature for the existence of strong-interaction-stable light-heavy tetraquarks. We find no evidence for any such deeply-bound states, beyond the $J^P=1^+$, $I=0$ $ud\bar{b}\bar{b}$ and $I=1/2$ $ls\bar{b}\bar{b}$ states already identified in earlier lattice studies. We also describe a number of systematic improvements to our previous lattice studies, including working with larger $m_\pi L$ to better suppress possible finite volume effects, employing extended sinks to better control excited-state contamination, and expanding the number of operators used in the GEVP analyses. Our results also allow us to rule out several phenomenological models which predict significant tetraquark binding in channels where no such binding is found.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-06-25 |