TY - JOUR
T1 - Quark mass dependence of nucleon mass and axial-vector coupling constant
AU - Procura, Massimiliano
AU - Hemmert, Thomas R.
AU - Musch, B. U.
AU - Weise, W.
PY - 2006/3
Y1 - 2006/3
N2 - We present an updated analysis of the quark mass dependence of the nucleon mass MN and nucleon axial-vector coupling gA, comparing different formulations of SU(2) Baryon Chiral Effective Field Theory, with and without explicit Δ (1232) degrees of freedom. We discuss the outcome of the corresponding interpolations between lattice QCD data and the physical values for these two nucleon observables. It turns out that in order to obtain successful interpolating functions at one-loop order, the inclusion of explicit Δ (1232) degrees of freedom is not decisive for the nucleon mass but crucial for gA. A chiral extrapolation of recent lattice results by the LHP collaborations is also shown.
AB - We present an updated analysis of the quark mass dependence of the nucleon mass MN and nucleon axial-vector coupling gA, comparing different formulations of SU(2) Baryon Chiral Effective Field Theory, with and without explicit Δ (1232) degrees of freedom. We discuss the outcome of the corresponding interpolations between lattice QCD data and the physical values for these two nucleon observables. It turns out that in order to obtain successful interpolating functions at one-loop order, the inclusion of explicit Δ (1232) degrees of freedom is not decisive for the nucleon mass but crucial for gA. A chiral extrapolation of recent lattice results by the LHP collaborations is also shown.
UR - http://www.scopus.com/inward/record.url?scp=32144445916&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysbps.2006.01.042
DO - 10.1016/j.nuclphysbps.2006.01.042
M3 - Article
AN - SCOPUS:32144445916
SN - 0920-5632
VL - 153
SP - 229
EP - 233
JO - Nuclear Physics B (Proceedings Supplements)
JF - Nuclear Physics B (Proceedings Supplements)
IS - 1 SPEC. ISS.
ER -