Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-12-12
Int.J.Mod.Phys.E19:91-112,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
Published in International Journal of Modern Physics E
Scientific paper
10.1142/S0218301310014650
We study the nucleon and three N* resonances' properties in an effective linear realization chiral SU_L(2) x SU_R(2) and U_A(1) symmetric Lagrangian. We place the nucleon fields into the so-called "naive" (1/2,0) + (0, 1/2) and "mirror" (0, 1/2) + (1/2,0) (fundamental) representations of SU_L(2) x SU_R(2), two of each -distinguished by their U_A(1) chiral properties, as defined by an explicit construction of the nucleon interpolating fields in terms of three quark (Dirac) fields. We construct the most general one-meson-baryon chiral interaction Lagrangian assuming various parities of these four nucleon fields. We show that the observed masses of the four lowest lying nucleon states can be well reproduced with the effective Lagrangian, after spontaneous symmetry breakdown, without explicit breaking of U_A(1) symmetry. This does not mean that explicit U_A(1) symmetry breaking does not occur in baryons, but rather that it does not have a unique mass prediction signature that exists e.g. in the case of spinless mesons. We also consider briefly the axial couplings with chiral representation mixing.
Dmitrašinović V.
Hosaka Atsushi
Nagata Keitaro
No associations
LandOfFree
A Lagrangian for the Chiral (1/2,0) + (0,1/2) Quartet Nucleon Resonances does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Lagrangian for the Chiral (1/2,0) + (0,1/2) Quartet Nucleon Resonances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Lagrangian for the Chiral (1/2,0) + (0,1/2) Quartet Nucleon Resonances will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-532934