- #1
robousy
- 334
- 1
Hey folks,
Sometimes I see the calculation of the vacuum energy written as:
[tex]\int\frac{d^3k}{(2\pi)^3}(k^2+m^2)[/tex]
and sometimes written:
[tex]\int\frac{d^4k}{(2\pi)^4}log(k^2+m^2)[/tex]
See for example http://arxiv.org/abs/hep-ph/0105021 equation9.
Does anyone know why you can increase the k integral power by one and why this introduces a log?
Thanks!
Sometimes I see the calculation of the vacuum energy written as:
[tex]\int\frac{d^3k}{(2\pi)^3}(k^2+m^2)[/tex]
and sometimes written:
[tex]\int\frac{d^4k}{(2\pi)^4}log(k^2+m^2)[/tex]
See for example http://arxiv.org/abs/hep-ph/0105021 equation9.
Does anyone know why you can increase the k integral power by one and why this introduces a log?
Thanks!
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