Is the Kronecker Delta Integral Appropriate for this Function?

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Hi all,

How to know the value of kronecker delta integrale ## \int \delta(m_h-2E) dE ## ?S.
 
It doesn't make sense to have a Kronecker \delta in this integral. Isn't this rather a Dirac \delta distribution?

If so, you may use the formula
\int_{\mathbb{R}} \mathrm{d} x \delta[f(x)] g(x)=\sum_{j} \frac{1}{\left |f'(x_j) \right|} g(x_j),
where f is a function that has only 1st order roots x_j.
 
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