Higher excited charmed and charmed-strange mesons in an unquenched quark model

Abstract

In this paper, as a continuation of our previous work, we systematically study the mass spectra and OZI-allowed strong decays of the higher $3S$-, $2P$-, $2D$-, and $1F$-wave charmed and charmed-strange mesons within a unified unquenched quark model. It is found that for most of the higher excitations, the masses are significantly shifted down by the coupled-channel effects. The newly observed $D_{s1}(2933{)}^{+}$ reported by the LHCb collaboration could be identified as the low-mass axial-vector state $D_s(2P_1)$ via the $2^1{P}_1-2^3{P}_1$ mixing. For the broad structure $D_{sJ}(3040{)}^{+}$ observed earlier by the \emph{BABAR} collaboration, the $D_s(3^1{S}_0)$ assignment seems to be favored over the high-mass mixed state $D_s(2P_1^{\prime })$. Meanwhile, the $D(3000{)}^0$ signals observed at LHCb cannot be well understood with any $3S$, $2P$, $2D$, or $1F$ assignments in the $D$-meson family. Our predicted masses and decay properties of the missing higher $D$ and $D_s$ mesons may provide useful information for future experimental searches.

18 pages, 1 figure