On the calculation of resonances by means of analytic continuation in coupling constant

The method of analytic continuation in the coupling constant in combination with the use of statistical Pade approximation designed to determine resonance parameters is introduced. It is shown that standard quantum chemistry codes provide accurate data which can be used for the process of analytic continuation in coupling constant. Resonance parameters, both the energy and the width, can be inferred for real molecules with accuracy comparable to other more elaborated methods.