Radiative and pionic transitions from the $D_{s1}(2460)$ to the $D_{s0}^\ast(2317)$

TL;DR

This paper estimates the partial widths of radiative and pionic transitions between $D_{s1}(2460)$ and $D_{s0}^ ext{*}(2317)$ assuming they are hadronic molecules, providing theoretical predictions consistent with experimental limits.

Contribution

It introduces a molecular scenario for these states and calculates transition widths, offering new insights into their structure and decay mechanisms.

Findings

Partial widths for $ ext{D}_{s1}(2460) o ext{D}_{s0}^ ext{*}(2317) ext{pi}^0$ are about 0.19-0.22 keV.

Partial widths for $ ext{D}_{s1}(2460) o ext{D}_{s0}^ ext{*}(2317) ext{gamma}$ are about 3.0-3.1 keV.

The ratio of radiative to pionic decay widths is estimated to be (6.6-10.6)×10^{-2}, below experimental upper limits.

Abstract

We estimate the partial widths for the radiative and pionic transitions from the $D_{s1}(2460)$ to the $D_{s0}(2317)$ in a molecule scenario, in which the $D_{s1}(2460)$ and $D_{s0}^\ast(2317)$ are considered as hadronic molecule states of $DK$ and $D^\ast K$, respectively. The partial widths for the $D_{s1}(2460) \to D_{s0}^\ast(2317) \pi^0$ and $D_{s1}(2460) \to D_{s0}^\ast(2317) \gamma$ are evaluated to be about $0.19 \sim 0.22$ keV and $3.0 \sim 3.1$ keV, respectively. In addition, the ratio of the $D_{s1}(2460) \to D_{s0}(2317) \gamma$ and $D_{s1}(2460) \to D_{s}^\ast \pi^0$ is estimated to be about $(6.6\sim 10.6) \times 10^{-2}$, which is safely under the measured upper limit.