The strangeness content of the nucleon from effective field theory and phenomenology

By J. M. Alarcón, L. Geng, J. Camalich, J. A. Oller. 2012

208 citations recorded by the source corpus.

We revisit the classical relation between the strangeness content of the nucleon, the pion-nucleon sigma term and the $SU(3)_F$ breaking of the baryon masses in the context of Lorentz covariant chiral perturbation theory with explicit decuplet-baryon resonance fields. We find that a value of the pion-nucleon sigma term of $\sim$60 MeV is not necessarily at odds with a small strangeness content of the nucleon, in line with the fulfillment of the OZI rule. Moreover, this value is indeed favored by our next-to-leading order calculation. We compare our results with earlier ones and discuss the convergence of the chiral series as well as the uncertainties of chiral approaches to the determination of the sigma terms.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4649e00bc4a518804e03b58a150799f457b9b828

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

1. Andreas Crivellin
2. S. Davidson
3. G. M. Pruna
4. A. Signer
5. E. Nardi

Citations in the corpus

• Renormalisation-group improved analysis of μ → e processes in a systematic effective-field-theory approach (2017, methodology): “See [47, 48] for analogous results obtained from a computation in an effective-field theoretical framework.”