On the Birman-Schwinger principle applied to (-Delta + m²)(1/2) - m
Maceda, Marco
Original · EN
The condition for E = 0 to be an eigenvalue of the operator (-Delta + m²)(1/2) -m + l V is obtained through the use of the Birman-Schwinger principle. By setting E=-a² and using the analyticity of the corresponding Birman-Schwinger kernel, the series development of (l(-1))(a) is obtained up to second order on a.
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