Long distance effects and strangeness in the nucleon

Details Long distance effects and strangeness in the nucleon Long distance effects and strangeness in the nucleon

2004-12-02

arxiv.org/abs/hep-ph/0412035v1

Fizika B14 (2005) 217-244

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 2 figures, to be published in a memorial volume for Dubravko Tadic in Fizika B

Scientific paper

We discuss the calculation of the strange magnetic radius of the proton in chiral perturbation theory. In particular we investigate the low energy component of the loop integrals involving kaons. We separate the chiral calculation into a low energy part and a high energy component through use of a momentum space separation scale. This separation shows that most of the chiral calculation comes from high energies where the effective field theory treatment is not valid. The resulting low energy prediction is in better agreement with dispersive treatments. Finally, we briefly discuss magnetic moments and show how our techniques can help resolve an old puzzle in understanding the magnetic moments of the proton and Sigma^+.

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