The Commutation of Axial Charge with Axial Divergence
نویسندگان
چکیده
منابع مشابه
Axial and tensor charge of the nucleon with dynamical fermions
Lattice QCD offers the possibility to investigate the internal structure of the nucleon without additional model assumptions. In particular, one can study how the mass, the axial charge and further properties of the nucleon change when the quark mass is varied or the nucleon is squeezed into a finite spatial box. Even if we could simulate at the physical quark mass and in a huge volume, we woul...
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The nucleon axial charge is calculated as a function of the pion mass in full QCD. Using domain wall valence quarks and improved staggered sea quarks, we present the first calculation with pion masses as light as 354 MeV and volumes as large as (3.5 fm)3. We show that finite volume effects are small for our volumes and that a constrained fit based on finite volume chiral perturbation theory agr...
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The nucleon's axial vector charge, g A , becomes delocalized in the chiral limit. When m π = 0, and SU (2) L ×SU (2) R is exact, 1/3 of the nucleon's axial charge is to be found at infinite distance from the nucleon. For finite m π this result is approached smoothly as m π → 0. We illustrate this effect by considering the lepton-proton spin-spin interaction arising from Z 0 exchange as a functi...
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Domain wall fermions (DWF) [1] have been successfully used by the RBC Collaboration for several applications [2]. In the baryon sector we had reported that DWF with Wilson gauge action in the quenched approximation can reproduce the first negative-parity excited state of nucleon [3] which defied theoretical attempts for a long time. Here we report the current status of our calculations on the n...
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Protons and neutrons have a rich structure in terms of their constituents, the quarks and gluons. Understanding this structure requires solving Quantum Chromodynamics (QCD). However QCD is extremely complicated, so we must numerically solve the equations of QCD using a method known as lattice QCD. Here we describe a typical lattice QCD calculation by examining our recent computation of the nucl...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1969
ISSN: 0033-068X
DOI: 10.1143/ptp.42.750