scholarly journals Positronium energy levels at ordermα7: Light-by-light scattering in the two-photon-annihilation channel

2014 ◽  
Vol 90 (4) ◽  
Author(s):  
Gregory S. Adkins ◽  
Christian Parsons ◽  
M. D. Salinger ◽  
Ruihan Wang ◽  
Richard N. Fell
Keyword(s):  
Light Scattering ◽  
Energy Levels ◽  
Annihilation Channel ◽  
Two Photon ◽  
Photon Annihilation ◽  
Positronium Energy

Absolute hyperfine energy levels and isotope shift of Rb 5S–6S two-photon transition

2021 ◽  
Vol 54 (17) ◽  
pp. 175001
Author(s):  
S T Orson ◽  
C D McLaughlin ◽  
M D Lindsay ◽  
R J Knize
Keyword(s):  
Isotope Shift ◽  
Energy Levels ◽  
Two Photon ◽  
Photon Transition

Two-photon annihilation into pion pair

1974 ◽  
Vol 48 (4) ◽  
pp. 380-384 ◽  
Author(s):  
S. Orito ◽  
M.L. Ferrer ◽  
L. Paoluzi ◽  
R. Santonico
Keyword(s):  
Pion Pair ◽  
Two Photon ◽  
Photon Annihilation
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