Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-11-29
Phys.Lett.B556:123-128,2003
Physics
High Energy Physics
High Energy Physics - Phenomenology
Additional references
Scientific paper
10.1016/S0370-2693(03)00126-6
We examine the implications of including corrections associated with the noncommutative extension of quantum electrodynamics - NCQED - to the decays of the ortho and para positronium (\Trip and \Sing) ground states. In NCQED, the well known charge conjugation argument restricting \Trip decays to an odd number of photons and \Sing decays to an even number of photons no longer obtains. Instead, the dominant two photon decay mode of \Sing is accompanied by a three photon mode. The dominant three photon decay mode of \Trip receives a NCQED correction, but there is no corresponding two photon decay mode in the weak binding limit. These corrections to the $P_s$ three photon decay mode have a different energy distribution, but their effect is too small to explain any discrepancy between the observed and calculated values of the \Trip lifetime.
Caravati Mauro
Devoto Alberto
Repko Wayne W.
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