Calculation of the nucleon axial charge in lattice QCD
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چکیده
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 nucleon axial charge.
منابع مشابه
Nucleon axial charge from quenched lattice QCD with domain wall fermions and DBW2 gauge action
The domain wall fermion (DWF) method, with its almost perfectly preserved chiral symmetry on the lattice, makes the calculation of the nucleon axial charge particularly easy. By maintaining chiral symmetry and using the Ward-Takahashi (WT) identity, one has ZA = ZV and the bare lattice calculation yields the physical value without explicit renormalization. The DBW2 improved gauge action provide...
متن کامل0 60 70 08 v 1 6 J ul 2 00 6 Calculation of the nucleon axial charge in lattice QCD
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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متن کاملNucleon Spin Structures from Lattice QCD: Flavor Singlet Axial and Tensor Charges
The flavor singlet axial and tensor charges of the nucleon are calculated in lattice QCD. We find ∆Σ = ∆u+∆d+∆s = +0.638(54)− 0.347(46)− 0.109(30) = +0.18(10) for the axial charge and δΣ = δu+ δd + δs = +0.839(60)− 0.231(55)− 0.046(34) = +0.562(88) for the tensor charge. The result for the axial charge shows reasonable agreement with the experiment and that for the tensor charge is the first pr...
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تاریخ انتشار 2006