I try to integrate this integral. But I could not. Where is my a mistake?
epsk = k^2/2/m
Ek = Sqrt[epsk*(epsk + 2*Delta)]
sigma0 = -Delta/4/Pi^2*Integrate[k^2/Ek, {k, 0, Infinity}]
How can I solve this problem?
(The answer should be (Delta*m)^(3/2)/Pi^2
