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Delocalization of the axial charge in the chiral limit | | R.L. Jaffe
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3 Aug 2001 | | Journal: | Phys.Lett. B529 (2002) 105-110 | | Subject: | hep-ph hep-lat hep-th nucl-th | | Abstract: | The nucleon’s axial vector charge, g_A, becomes delocalized in the chiral limit. When m_pi = 0, and SU(2)_L x 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_pi this result is approached smoothly as m_pi -> 0. We illustrate this effect by considering the lepton-proton spin-spin interaction arising from Z^0 exchange as a function of m_pi. Delocalization may have implications for lattice calculations of g_A and in nuclei. | | Source: | arXiv, hep-ph/0108015 | | Services: | Forum | Review | PDF | Favorites | |
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