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Prediction of positive parity Bs mesons and search for the X(5568)

2016/11/08 by Daniel Mohler, Mohler, Daniel, C.B. Lang +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1611.02592

openalex publication_date 2016/11/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We use a combination of quark-antiquark and B(*)K interpolating fields to predict the mass of two QCD bound states below the B^*K threshold in the quantum channels JP=0+ and 1+. The mesons correspond to the b-quark cousins of the Ds0^*(2317) and Ds1(2460) and have not yet been observed in experiment, even though they are expected to be found by LHCb. In addition to these predictions, we obtain excellent agreement of the remaining p-wave energy levels with the known Bs1(5830) and Bs2^*(5840) mesons. The results from our first principles calculation are compared to previous model-based estimates. More recently the D0 collaboration claimed the existence of an exotic resonance X(5568) with exotic flavor content bsdu. If such a state with JP=0+ exists, only the decay into Bsπ is open which makes a lattice search for this state much cleaner and simpler than for other exotic candidates involving heavy quarks. We conclude, however, that we do not find such a candidate in agreement with a recent LHCb result.

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