1.
Few Body Syst
; 62(3): 63, 2021.
Artículo
en Inglés
| MEDLINE
| ID: mdl-34720287
RESUMEN
We review recent experiments carried out by the PiHe collaboration of the Paul Scherrer Institute (PSI) that observed an infrared transition of three-body pionic helium atoms by laser spectroscopy. These measurements may lead to a precise determination of the charged pion mass, and complement experiments of antiprotonic helium atoms carried out at the new ELENA facility of CERN.