Masses of [70, l+] Baryons in the 1/N(c) Expansion

Apr, 2006
20 pages
Published in:
  • Phys.Rev.D 74 (2006) 034014
e-Print:

Citations per year

20062011201620212024024681012
Abstract:
The masses of positive [70,0+][{\bf 70},0^+] and [70,2+][{\bf 70},2^+] nonstrange and strange baryons are calculated in the 1/Nc1/N_c expansion. The approach is based on the separation of a system of NcN_c quarks into an excited core and an excited quark. The previous work for two flavor baryons is now extended to include strange baryons, to first order in SU(3)-flavor breaking. We show that the extension to Nf=3N_f = 3 maintains the regularities previously observed in the behaviour of the linear term in NcN_c, of the spin-spin and of the spin-orbit terms. In particular the contribution of the spin-dependent terms decrease with the excitation energy, the dominant term remaining the spin-spin term.
  • 11.15.Pg
  • 12.39.-x
  • 11.30.Hv
  • baryon: hadron spectroscopy
  • baryon: mass
  • resonance
  • hyperon: mass
  • expansion 1/N: color
  • symmetry breaking: SU(3)
  • excited state: wave function