Learning about the chiral structure of the proton from the hyperfine splitting

Antonio Pineda

Learning about the chiral structure of the proton from the hyperfine splitting

High Energy Physics - Phenomenology 2007-05-23 v1 Nuclear Theory Atomic Physics

Authors: Antonio Pineda

Abstract

The complete analytical $O(m_l^3\alpha^5/m_p^2\times (\log{m_\pi}, \log{\Delta}, \log{m_l}))$ contribution to the Hyperfine splitting is given. It can explain about 2/3 of the difference between experiment and the pure QED prediction when setting the renormalization scale at the $\rho$ mass. The suppression of the polarizability piece with respect the Zemach one seems to be, to a large extent, a numerical accident. We give an estimate of the matching coefficient of the spin-dependent proton-lepton operator in heavy baryon effective theory.

Keywords

hyperfine splitting chiral structure proton heavy baryon effective theory QED corrections

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@article{arxiv.hep-ph/0308193,
  title  = {Learning about the chiral structure of the proton from the hyperfine splitting},
  author = {Antonio Pineda},
  journal= {arXiv preprint arXiv:hep-ph/0308193},
  year   = {2007}
}

Comments

3 pages, 2 figures. Contribution to the 17th International IUPAP Conference on Few-body Problems in Physics, June 5-10, 2003 Durham, North Carolina, USA

Learning about the chiral structure of the proton from the hyperfine splitting

Abstract

Keywords

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