$D_{sJ}(2860)$ resonance and the $s_\ell^P={5\over 2}^-$ $c \bar s$ ($c \bar q$) doublet

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/189159We analyze the recently discovered $D_{sJ}(2860)$ meson using arguments based on the heavy quark expansion together with the experimental observations. We consider the possible quantum number assignments, arguing that the interpretation of the meson as the $J^P=3^-$ $c \bar s$ state is favoured.LaTeX, 9 pages, 1 figure - published versionHigh Energy Physics - Phenomenology$D_{sJ}(2860)$ resonance and the $s_\ell^P={5\over 2}^-$ $c \bar s$ ($c \bar q$) doublettext