scholarly journals Positronium decay into a photon and neutrinos

2016 ◽  
Vol 94 (11) ◽  
Author(s):  
Andrzej Pokraka ◽  
Andrzej Czarnecki
Keyword(s):  
Positronium Decay

Positronium decay study of zirconia–silica sol–gels

2000 ◽  
Vol 272 (2-3) ◽  
pp. 209-217 ◽  
Author(s):  
M. Misheva ◽  
N. Djourelov ◽  
F.M.A. Margaca ◽  
I.M. Miranda Salvado
Keyword(s):  
Silica Sol ◽  
Decay Study ◽  
Positronium Decay

Free volume model for positronium decay in molecular materials

1969 ◽  
Vol 28 (11) ◽  
pp. 760-761 ◽  
Author(s):  
B.V. Thosar ◽  
V.G. Kulkarni ◽  
R.G. Lagu ◽  
Girish Chandra
Keyword(s):  
Free Volume ◽  
Molecular Materials ◽  
Volume Model ◽  
Free Volume Model ◽  
Positronium Decay

scholarly journals POSITRONIUM DECAY: GAUGE INVARIANCE AND ANALYTICITY

2002 ◽  
Vol 17 (10) ◽  
pp. 1355-1398 ◽  
Author(s):  
J. PESTIEAU ◽  
C. SMITH ◽  
S. TRINE
Keyword(s):  
Wave Function ◽  
Form Factor ◽  
Binding Energy ◽  
Gauge Invariance ◽  
Dispersion Relations ◽  
Decay Rates ◽  
Effective Form ◽  
Theoretical Predictions ◽  
Positronium Decay ◽  
Analysis Of Binding Energy

The construction of positronium decay amplitudes is handled through the use of dispersion relations. In this way, emphasis is put on basic QED principles: gauge invariance and soft-photon limits (analyticity).A firm grounding is given to the factorization approaches, and some ambiguities in the spin and energy structures of the positronium wave function are removed. Nonfactorizable amplitudes are naturally introduced. Their dynamics are described, especially regarding the enforcement of gauge invariance and analyticity through delicate interferences. The important question of the completeness of the present theoretical predictions for the decay rates is then addressed. Indeed, some of those nonfactorizable contributions are unaccounted for by NRQED analyses. However, it is shown that such new contributions are highly suppressed, being of [Formula: see text].Finally, a particular effective form factor formalism is constructed for parapositronium, allowing a thorough analysis of binding energy effects and analyticity implementation.

Glass Transition of Atactic Polystyrene byOrtho‐Positronium Decay

1970 ◽  
Vol 41 (11) ◽  
pp. 4273-4275 ◽  
Author(s):  
J. R. Stevens ◽  
A. C. Mao
Keyword(s):  
Glass Transition ◽  
Atactic Polystyrene ◽  
Positronium Decay

scholarly journals WHAT COULD BE LEARNT FROM POSITRONIUM FOR QUARKONIUM?

2004 ◽  
Vol 19 (23) ◽  
pp. 3905-3917 ◽  
Author(s):  
CHRISTOPHER SMITH
Keyword(s):  
Binding Energy ◽  
Bound State ◽  
State Decay ◽  
Positronium Decay

In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay computations is proposed, in which the binding energy is treated non-perturbatively. The properties of the method are sketched by reviewing standard positronium decay processes. Then, it is shown how applying the method to quarkonia sheds new light on some longstanding puzzles.

The Quenching ofOrtho-Positronium Decay by a Magnetic Field

1952 ◽  
Vol 88 (2) ◽  
pp. 424-424 ◽  
Author(s):  
John Wheatley ◽  
David Halliday
Keyword(s):  
Magnetic Field ◽  
Positronium Decay

Rate for positronium decay to five photons

1983 ◽  
Vol 28 (2) ◽  
pp. 1164-1165 ◽  
Author(s):  
Gregory S. Adkins ◽  
Frank R. Brown
Keyword(s):  
Positronium Decay
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