Newly observed D(2550), D(2610), and D(2760) as 2S and 1D charmed mesons

TL;DR

This paper analyzes newly observed D mesons, identifying their quantum states and decay behaviors, and provides predictions to guide future experimental searches for missing D-wave charmed mesons.

Contribution

It offers a detailed interpretation of D(2550), D(2610), and D(2760) as specific 2S and 1D charmed mesons, with decay width estimates and predictions for unobserved states.

Findings

D(2610) is an admixture of 2^3S_1 and 1^3D_1 with J^P=1^-

D(2760) is either the orthogonal partner of D(2610) or 1^3D_3

Decay width estimate for D(2550) is much lower than experimental value

Abstract

We study three newly observed D(2550), D(2610), and D(2760) by the BaBar Collaboration utilizing the mass spectra and investigating the strong decays. Our calculation indicates that D(2610) is an admixture of $2^3S_1$ and $1^3D_1$ with $J^P=1^-$. $D(2760)$ can be explained as either the orthogonal partner of D(2610) or $1^3D_3$. Our estimate of the decay width for $D(2550)$, assuming it as $2^1S_0$, is far below the experimental value. the threshold effect because the strong decay of $D(2550)\to D_0^*\pi$ is forbidden.} The decay behavior of the remaining two 1D charmed mesons, i.e., $^3D_2$ and $^1D_2$ ($J^P=2^-$) states, is predicted, which will help future experimental search for these missing $D$-wave charmed mesons.