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nucl-th2003
Energy level displacement of the excited nl state of pionic hydrogen
A. N. Ivanov, M. Faber, A. Hirtl +2
The energy level displacements of the excited nl states of pionic hydrogen and the contribution of the ns -> 1s transitions and the (pi^-p)_Coul -> 1s transitions of the pi^-p pair…
nucl-th2003
On pionic hydrogen. Quantum field theoretic, relativistic covariant and model-independent approach
A. N. Ivanov, M. Faber, A. Hirtl +2
We consider pionic hydrogen A_(pi p), the bound pi^- p state. Within the quantum field theoretic and relativistic covariant approach we calculate the shift and width of the energy…