Indirect search of exotic mesons: B -> J/psi + Anything

TL;DR

This paper explores the potential role of unobserved exotic mesons in explaining discrepancies between theoretical predictions and experimental data on J/psi momentum distributions in B decays, suggesting new XYZ states might be involved.

Contribution

It introduces the consideration of exotic XY Z mesons into the analysis of B decay processes, extending existing models to account for unobserved states.

Findings

Inclusion of exotic mesons reduces the discrepancy between theory and data.

Standard QCD components are updated with new contributions.

Residual differences suggest the existence of yet unobserved XYZ mesons.

Abstract

We reconsider the discrepancy between theory and data in the momentum distribution of slow J/psi in B decays. Beside an update of the standard color singlet and color octet QCD components, we include the contribution from XY Z exotic mesons, and show that the residual discrepancy could be accommodated considering new XYZ mesons still unobserved.