Friday, May 25, 2012

1205.5328 (Hua-Xing Chen)

Baryon Tri-local Interpolating Fields    [PDF]

Hua-Xing Chen
We systematically investigate the tri-local (non-local) three-quark baryon fields with U_L(2)*U_R(2) chiral symmetry, according to their Lorentz and isospin (flavor) group representations. We study their chiral transformation properties and find all the possible chiral multiplets consisting J=1/2 and J=3/2 baryon fields. We find that the axial coupling constant |g_A| = 5/3 is only for nucleon fields belonging to the chiral representation (1/2,1)+(1,1/2) which contains both nucleon fields and Delta fields. Moreover, all the nucleon fields belonging to this representation have |g_A| = 5/3.
View original: http://arxiv.org/abs/1205.5328

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