17zpAvrNZYwg43hXoM6FFp90E4ODGSIE8k+DG+s8PMnvwAmqdGp5r/TCQm2dRjYRgwoKISOikxhG welHmkES8QM59l8J96RtdxwWWkd7eo8SX5rOXtYxJYSETO9sWIfmRCr89vTRJHsWwDzNXorMExAC V983VL0cMYu3VyWFaodzneNS+JVoEKd1TwOsVQvTeD5n0ezHpOyshcXp2QsH1hF3hDz0WZUwd8Lp os/Ul0WNfEb9tk90koq234y18IpRjA65asRRH1MGi...
1+D7FkODpibc9taA4VRvap85aNHFREadzLOexEFUV2QrK3oUEb0saw1bd e0fLN7cAykz5x5e3KeISQSgKhjaTJvMqd18UPc2obgPGuI4YVhZS9H2RvHPQ8YwrlJhbDXTbITXo JycXCmUEK5RJtr5LLvZCOGaB1jPwKYHHRVRKWoKb3WcLlUpOOn6Yj6WOpK+UHWFe0I4dQgj0IJqV Ds+QlSzglWpJrCt+px2A8I2j633GX1Aje8Zh1u3eSFpGtu5DOYAIZaYcl...
Since the final expression is an analytic function of D, we get the physically meaningful result via an analytic continuation down to D = 4. This discussion can be also summarized by saying that we are implicitly using dimensional regularization to make sense of the expression (1), which is ...