Understanding the charmed states recently observed by the LHCb and BaBar Collaborations in the quark model

TL;DR

This paper analyzes recently observed charmed states by LHCb and BaBar using the relativistic quark model and the $^3P_0$ decay model, showing they fit well within the conventional quark-antiquark framework.

Contribution

It provides a detailed comparison of the observed charmed states with theoretical predictions, assigning specific quantum states within the relativistic quark model.

Findings

Masses and decay properties match the $qar{q}$ model predictions.

Identifies specific states as $D(2^1S_0)$, $D(2^3S_1)$, etc.

Supports the conventional quark model explanation for these states.

Abstract

Comparing the expected spectroscopy in the relativistic quark model and the predicted strong decays in the $^3P_0$ model employing the realistic wave functions from the relativistic quark model with the measured properties of the LHCb and BaBar charmed states, we find that the masses and strong decays of these charmed states can be reasonably explained in the conventional $q\bar{q}$ picture, and therefore suggest that the $D(2550)$/$D_J(2580)$, $D^*(2600)$/$D^*_J(2650)$, $D(2750)$/$D_J(2740)$, $D^*(2760)$/$D^*_J(2760)$, $D_J(3000)$, and $D^*_J(3000)$ can be identified as the $D(2^1S_0)$, $D(2^3S_1)$, $D^\prime_2(1D)$, $D(1^3D_3)$, $D(3^1S_0)$, and $D(1^3F_4)$, respectively.