Add to ORKGQED gauge invariance, when combined with analyticity, leads to constraints on the low energy end of the emitted photon spectra. This is known as Low's theorem. It is shown that the Ore-Powell result, as well as further developments for the orthopositronium differential decay rate, are in contradiction with Low's theorem, i.e. that their predicted soft photon spectra are incorrect. A solution to this problem is presented. The implications for the orthopositronium lifetime puzzle, the charmonium rho-pi puzzle, the prompt photon spectrum in inclusive quarkonium decays and the extraction of alpha_S from quarkonium annihilation rates are briefly commented. Comment: LaTeX, 10 page
Whether in the Standard Model or beyond it, neutrinos contribute to the invisible decay mode of orth...
A simple method to compute QED bound state properties is presented, in which binding energy effects ...
Positronium decay rates are computed at the one-loop level, using convolution-type factorized amplit...
QED gauge invariance, when combined with analyticity, leads to constraints on the low energy end of ...
AbstractQED gauge invariance, when combined with analyticity, leads to constraints on the low energy...
QED gauge invariance, when combined with analyticity, leads to constraints on the low energy end of ...
AbstractQED gauge invariance, when combined with analyticity, leads to constraints on the low energy...
As noticed in Ref.[1], the Ore-Powell's classical calculation of the o-Ps -> 3 gamma decay amplitude...
In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay compu...
In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay compu...
The photon spectrum in orthopositronium to 3 gamma decay is computed using effective field theory me...
Positronium annihilation amplitudes that are computed by assuming a factorization approximation with...
We consider the search for gamma-rays produced by the annihilation or decay of low-mass dark matter ...
The construction of positronium decay amplitudes is handled through the use of dispersion relations....
Whether in the Standard Model or beyond it, neutrinos contribute to the invisible decay mode of orth...
Whether in the Standard Model or beyond it, neutrinos contribute to the invisible decay mode of orth...
A simple method to compute QED bound state properties is presented, in which binding energy effects ...
Positronium decay rates are computed at the one-loop level, using convolution-type factorized amplit...
QED gauge invariance, when combined with analyticity, leads to constraints on the low energy end of ...
AbstractQED gauge invariance, when combined with analyticity, leads to constraints on the low energy...
QED gauge invariance, when combined with analyticity, leads to constraints on the low energy end of ...
AbstractQED gauge invariance, when combined with analyticity, leads to constraints on the low energy...
As noticed in Ref.[1], the Ore-Powell's classical calculation of the o-Ps -> 3 gamma decay amplitude...
In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay compu...
In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay compu...
The photon spectrum in orthopositronium to 3 gamma decay is computed using effective field theory me...
Positronium annihilation amplitudes that are computed by assuming a factorization approximation with...
We consider the search for gamma-rays produced by the annihilation or decay of low-mass dark matter ...
The construction of positronium decay amplitudes is handled through the use of dispersion relations....
Whether in the Standard Model or beyond it, neutrinos contribute to the invisible decay mode of orth...
Whether in the Standard Model or beyond it, neutrinos contribute to the invisible decay mode of orth...
A simple method to compute QED bound state properties is presented, in which binding energy effects ...
Positronium decay rates are computed at the one-loop level, using convolution-type factorized amplit...