32 citations · 115 across the 17 of their papers we have counts for
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Resonance Propagation and Threshold Singularities
J. L. Lucio M., J. Pestieau
We consider the problem of propagation of an unstable particle in the framework of Quantum Field Theory. Using unitarity, we show that a real renormalization constant free of thres…
Masses and widths of the rho(770)
M. Feuillat, J. L. Lucio M, J. Pestieau
Isospin violation in the mass and width is considered within the matrix approach using combined fits to the and data performed b…
Analytical Behaviour of Positronium Decay Amplitudes
G. Lopez Castro, J. Pestieau, C. Smith +1
Positronium annihilation amplitudes that are computed by assuming a factorization approximation with on-shell intermediate leptons do not exhibit good analytical behaviour. Using d…
Parapositronium Decay and Dispersion Relations
G. Lopez Castro, J. Pestieau, C. Smith +1
Positronium decay rates are computed at the one-loop level, using convolution-type factorized amplitudes. The dynamics of this factorization is probed with dispersion relations, sh…
Binding energy corrections in positronium decays
G. Lopez Castro, J. Pestieau, C. Smith
Positronium annihilation amplitudes that are computed by assuming a factorization approximation with on-shell intermediate leptons, do not exhibit good analytical behavior. We prop…