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Flavor decomposition of the pion-nucleon σ-term
oleh: Daniel Severt, Ulf-G. Meißner, Jambul Gegelia
Format: | Article |
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Diterbitkan: | SpringerOpen 2019-03-01 |
Deskripsi
Abstract We re-analyze the flavor decomposition of the pion-nucleon σ-term in the framework of baryon chiral perturbation to fourth order. We employ a covariant and the heavy baryon framework including also the low-lying decuplet. Using only continuum data, we find a small strangeness content of the proton. The uncertainties are, however, large and might be overcome by dedicated lattice QCD calculations.