University of Connecticut

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Particle, Astrophysics, and Nuclear Physics Seminar

Monday, December 5, 2016
2:00pm – 3:00pm

Storrs Campus
Gant Science Complex, Physics, Room PB-121

Dmitrij Siemens, Bochum University, Germany, and Ph.D. student with John Donoghue, UMass

“Pion-Nucleon Scattering in Chiral Perturbation Theory”

Elastic pion-nucleon scattering is analyzed in the framework of chiral perturbation theory at the full one-loop order with explicit Delta degrees of freedom. The analysis is performed in the small scale expansion within the heavy baryon and a covariant approach based on the extended on mass-shell renormalization scheme. The pertinent low-energy constants contributing to the pion-nucleon scattering amplitude are extracted from fits to experimental scattering data as well as sub threshold parameters. A novel approach to estimate the theoretical uncertainty based on the truncation of the chiral series is employed in the fitting procedure. The obtained results for the various pion-nucleon scattering observables are presented and discussed.


Dawn Rawlinson, 486-4916,

Physics Department (primary)

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