The pion-nucleon σ term from pionic atoms
Earlier work suggested that the in-medium πN threshold isovector amplitude b1(ρ) gets renormalized in pionic atoms by ∼30% away from its ρ=0 free-space value, relating such renormalization to the leading low-density decrease of the in-medium quark condensate <q¯q> and the pion decay constant f...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-05-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319301935 |