Strong interaction shift and width of the 1s level in pionic hydrogen.
Sigg
D
Badertscher
A
Bogdan
M
Goudsmit
PF
Leisi
HJ
Matsinos
E
Schröder
H
Zhao
ZG
Chatellard
D
Egger
J
Jeannet
E
Aschenauer
EC
Gabathuler
K
Simons
LM
Rusi El Hassani AJ