Diabatic Dynamical Diquark Bound States: Mass Corrections and Widths

Richard F. Lebed; Steven R. Martinez

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arXiv · 2404.15186

Diabatic Dynamical Diquark Bound States: Mass Corrections and Widths

Richard F. Lebed·Steven R. Martinez

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Abstract

Using the diabatic formalism, which generalizes the adiabatic approximation in the Born-Oppenheimer formalism, we apply well-known Hamiltonian methods to calculate the effect of open di-meson thresholds that lie well below the mass of elementary $c\bar c q\bar q^\prime$, $c\bar c s\bar s$, and $c \bar c q \bar s$ tetraquark bound states. We compute the resulting mass shifts for these states, as well as their decay widths to the corresponding meson pairs. Each mass eigenstate, originally produced using a bound-state approximation under the diabatic formalism, consists of an admixture of a compact diquark-antidiquark configuration (an eigenstate of the original dynamical diquark model) with an extended di-meson configuration induced by the nearest threshold. We compare our results with those from our recent work that employs a scattering formalism, and find a great deal of agreement, but also comment upon interesting discrepancies between the two approaches.

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Richard F. Lebed, Steven R. Martinez. 2024-04-23. Diabatic Dynamical Diquark Bound States: Mass Corrections and Widths. https://arxiv.org/abs/2404.15186

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