Studying the nature of the lightest charmed axial mesons via femtoscopy

TL;DR

This paper uses femtoscopic analysis to explore the nature of the lightest axial charmed mesons, combining meson-meson dynamics, quark-model states, and lattice QCD data to interpret their properties.

Contribution

It introduces a novel femtoscopic approach integrating coupled channel dynamics and lattice QCD inputs to study axial charmed mesons.

Findings

Identifies signatures of axial charmed mesons in correlation functions.

Demonstrates the importance of coupled channel effects.

Provides insights into meson properties consistent with experimental data.

Abstract

In this work we discuss how femtoscopic analysis can shed light on the nature of the two lightest axial charmed mesons, denominated as $D_1(2430)$ and $D_1(2420)$, whose masses are similar but widths are different. Their properties are reasonably described taking into account meson-meson coupled channel dynamics and a bare quark-model pole constituting the lowest-order amplitudes. Two different bare quark-model states are used in order to accommodate the different scattering lengths coming from the lattice QCD calculations for the $D\pi$ and $D^*\pi$ systems and the data from the ALICE Collaboration on the $D\pi$ system. The amplitudes are employed as inputs to determine the correlation functions for the $D^{*}\pi$ and $D\rho$ channels and identify the signatures associated with the lowest-lying axial charmed mesons.