Canonical interpretation of the $D_{s0}(2590)^{+}$ resonance

TL;DR

This paper uses a modified potential model and decay analysis to interpret the $D_{s0}(2590)^{+}$ resonance as the $D_{s}(2^1S_0)$ state, aligning theoretical predictions with experimental data.

Contribution

It introduces a screening effect in the potential model to better match the observed mass and decay properties of the $D_{s0}(2590)^{+}$ resonance.

Findings

Mass and width are consistent with experimental data.

Supports the interpretation of $D_{s0}(2590)^{+}$ as $D_{s}(2^1S_0)$.

Uses modified relativized quark model and $^3P_0$ decay model.

Abstract

The $D_{s0}(2590)^{+}$ resonance observed by LHCb Collaboration is a strong candidate of the $D_{s}(2^1S_0)$ state according to its spin parity and strong decay mode. However, the measured mass seems relatively lower than the previous theoretical predictions, which interests the coupled channel interpretations in the literature. In this work, we adopt an alternate approach, taking into account the screening effects in the potential model, to describe the $D_{s0}(2590)^{+}$ resonance. The mass spectrum and strong decays of the excited charmed-strange mesons are investigated within the modified relativized quark model and $^3P_0$ model. The calculated mass and width of the $D_{s0}(2590)^{+}$ are consistent with the experimental observations, which indicate that it can be reasonably interpreted as the $D_{s}(2^{1}S_{0})$ state.