Resonances in muonic systems

Abstract
A number of resonances, shape as well as Feshbach type, have been observed in atomic systems. It is expected that similar types of resonances exist in muonic systems. Froelich and Szalewicz [Phys. Lett. A 129, 321 (1988)] carried out a calculation for tdμ and obtained two resonances, for J=0 and 1, just above the dμ threshold. Our calculation, carried out with large basis sets and different sets of nonlinear parameters, using the complex-rotation method, shows the existence of Feshbach-type resonances below the n=2 threshold of tμ and dμ. Positions of these resonances are in good agreement with the results of Hara and Ishihara [Phys. Rev. A 40, 4232 (1989)]. The widths of these resonances are calculated.