<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>D</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>2420</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> and its interactions with a kaon: Open charm states with strangeness

In this work we present an attempt to describe the $X_1(2900)$ found by LHCb collaboration, in experimental data on invariant mass spectrum of $ D^-K^+$, as a three-meson molecular state $K\rho\bar D$ system. We discuss that interactions all subsystems are attractive nature, with $\rho \bar interaction generating $\bar D_1(2420)$ and $K \rho$ resonating $K_1(1270)$. find system can form three-body but higher than $X_1(2900)$. investigate \rho too, finding dynamics generates isoscalar state, which be related $D_{s1}^*(2860)$, exotic isovector state. This latter has similar $X_0(2900)$ states LHCb, very small width ($\sim 7.4 \pm 0.9$ MeV) necessarily requires more two quarks its properties. hope our findings will encourage investigations Finally, pursuit description for $X_1(2900)$, study $\pi\bar K^* D^*$ where K^*D^*$ forms $0^+$, $1^+$ $2^+$ states. do not associated