Structures of the Ω baryon with the effects of the kaon cloud

초록

The Ω baryon is an isosinglet baryon and consists solely of the strange valence quarks. This means that the kaon cloud will come into essential play in describing the structure of the Ω baryon. In any SU(3) chiral solitonic approach, all the baryons have the pion tail because of the hedgehog symmetry, which requires the embedding of the SU(2) soliton into SU(3). This indicates that the Ω baryon contains inevitably the pion tail within this standard method. In the present talk, we show how one can incorporate the effects of the kaon cloud to describe the Ω baryon. Replacing the average of the up and down quark masses with the large valence quark mass, we are able to produce self-consistently the profile function for the kaon cloud. We then evaluate the properties of the Ω baryon. We present the results for the EM and axial-vector form factors of the Ω baryon with the effects of the kaon cloud and compare the results with those from lattice QCD.