Excited <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ω</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> Baryons as <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>2</mml:mn><mml:mi>S</mml:mi></mml:mrow></mml:math> states

Abstract

The LHCb experiment has recently reported two excited ${\mathrm{\ensuremath{\Omega}}}_{c}$ resonances decaying to ${\mathrm{\ensuremath{\Xi}}}_{c}^{+}{K}^{\ensuremath{-}}$, with masses about 3185 MeV and 3327 MeV. We discuss their assignment to $2{S}_{1/2}$ and $2{S}_{3/2}$ states, which can be compared with masses based on extrapolation from the observed $1S$ states. The agreement is not perfect, but weighs against an earlier alternative assignment. Consequences for the spin-averaged $2P$ states are discussed.

Topics & Concepts