Systematic expansion for spin particles in baryon chiral perturbation theory
نویسندگان
چکیده
منابع مشابه
Baryon chiral perturbation theory
We provide an introduction to the power-counting issue in baryon chiral perturbation theory and discuss some recent developments in the manifestly Lorentz-invariant formulation of the one-nucleon sector. As explicit applications we consider the chiral expansion of the nucleon mass, its convergence properties, and calculations of the electromagnetic and axial form factors of the nucleon.
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The chiral Lagrangian for baryons is formulated in an expansion in 1/Nc. The chiral Lagrangian implements the contracted spin-flavor symmetry of large-Nc baryons as well as nonet symmetry of the leading planar diagrams. Large-Nc consistency conditions ensure that chiral loop corrections are suppressed in 1/Nc through exact cancellation of chiral loop graphs to fixed orders in 1/Nc. Application ...
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The masses of the charmed baryons in the 6 representation of SU(3) obey an equal spacing rule at lowest order in SU(3) breaking, O(ms). We compute the corrections to this relation at order O(m s ) arising from meson loops using chiral perturbation theory combined with heavy quark symmetry and find them to be small. We also examine the hyperfine interaction responsible for the splitting between ...
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We consider the chiral expansion of the octet baryon magnetic moments in heavy baryon chiral perturbation theory including all terms which are of order q4. These terms are formally of quadratic order in the quark masses. We show that despite the large non– analytic quark mass corrections to the Coleman–Glashow relations at order q3, including all analytic and non–analytic corrections at order q...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1997
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(97)00049-x