Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1848553 | Physics Letters B | 2016 | 5 Pages |
Abstract
The pion-nucleon Ï-term can be stringently constrained by the combination of analyticity, unitarity, and crossing symmetry with phenomenological information on the pion-nucleon scattering lengths. Recently, lattice calculations at the physical point have been reported that find lower values by about 3Ï with respect to the phenomenological determination. We point out that a lattice measurement of the pion-nucleon scattering lengths could help resolve the situation by testing the values extracted from spectroscopy measurements in pionic atoms.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Martin Hoferichter, Jacobo Ruiz de Elvira, Bastian Kubis, Ulf-G. MeiÃner,