scholarly journals Positronium energy levels at order mα 7 : Vacuum polarization corrections in the two-photon-annihilation channel

2015 ◽  
Vol 747 ◽  
pp. 551-555 ◽  
Author(s):  
Gregory S. Adkins ◽  
Christian Parsons ◽  
M.D. Salinger ◽  
Ruihan Wang
Keyword(s):  
Vacuum Polarization ◽  
Energy Levels ◽  
Annihilation Channel ◽  
Two Photon ◽  
Photon Annihilation ◽  
Positronium Energy

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

scholarly journals The Uehling correction to the energy levels in a pionic atom

2006 ◽  
Vol 84 (2) ◽  
pp. 107-113 ◽  
Author(s):  
S G Karshenboim ◽  
E Yu. Korzinin ◽  
V G Ivanov
Keyword(s):  
Free Electron ◽  
Vacuum Polarization ◽  
Energy Levels ◽  
Analytic Form ◽  
Electron Mass ◽  
Mass Ratio ◽  
Pionic Atom ◽  
Closed Analytic Form

We consider a correction to energy levels in a pionic atom induced by the Uehling potential, i.e., by a free electron vacuum-polarization loop. The calculation is performed for circular states (l = n–1). The result is obtained in a closed analytic form as a function of Zα and the pion-to-electron mass ratio. Certain asymptotics of the result are also presented.PACS Nos.: 12.20.Ds, 36.10.Gv

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

Vacuum polarization in muonic and exotic atoms: the Lamb shift at medium Z and high n

2007 ◽  
Vol 85 (5) ◽  
pp. 551-561 ◽  
Author(s):  
E Yu. Korzinin ◽  
V G Ivanov ◽  
S G Karshenboim
Keyword(s):  
Quantum Number ◽  
Lamb Shift ◽  
Vacuum Polarization ◽  
Principal Quantum Number ◽  
Energy Levels ◽  
Exotic Atoms ◽  
Atomic States

We present new results on various asymptotics for the Uehling contribution to the energy levels in atomic states in hydrogen-like atoms that have a principal quantum number n with a high value. The results may be applied to conventional atoms (with an orbiting electron) as well as to muonic, pionic, antiprotonic, and other exotic atoms.PACS Nos.: 36.10.Gv, 31.30.Jv

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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