Rho-dominance and a new family of sum rules for pion-baryon scattering
✍ Scribed by H. Banerjee; S. Mallik; D. Dutta-Roy
- Publisher
- Springer-Verlag
- Year
- 1970
- Weight
- 868 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0369-3546
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The Adler-Weisberger and Goldberger-Miyazawa-Oehme sum rules are calculated within a relativistic, unitary and crossing symmetric dynamical model for pion-nucleon scattering using two different methods: (1) by evaluating the scattering amplitude at the corresponding low-energy kinematics and (2) by
In what follows, we explore existing sum rule analyses of the u, d and s quark masses. We argue that certain assumptions about the behavior of unmeasured continuum scalar and pseudoscalar spectral functions can lead to significant overestimates of these masses, and illustrate the source of the probl