- #1
Safinaz
- 260
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- TL;DR Summary
- I try to get the result of integration, equation ( 16 ) in this paper:
https://arxiv.org/abs/hep-ph/9905221
Hello!
The integral in equation (16), at the paper, is:
##I = r \int_{-\pi}^{\pi} e^{-2kr\phi} ~d\phi ##
My integration is as the following :
## I = - \frac{1}{2 k} e^{-2kr\phi} ~|_{-\pi}^{\pi} + C ##, so
## I = - \frac{1}{2 k} ( e^{-2kr\pi} -e^{2kr\pi})+ C ##
Now how to use the initial conditions or how to get the result they have got?
which is
##\frac{1}{k} ( 1-e^{-2kr\pi} ) ##
In equation 16 there are some other factors, ##M_{pl}## and ##M## which are Planck's scales at different dimensions.
Any help is appreciated!
The integral in equation (16), at the paper, is:
##I = r \int_{-\pi}^{\pi} e^{-2kr\phi} ~d\phi ##
My integration is as the following :
## I = - \frac{1}{2 k} e^{-2kr\phi} ~|_{-\pi}^{\pi} + C ##, so
## I = - \frac{1}{2 k} ( e^{-2kr\pi} -e^{2kr\pi})+ C ##
Now how to use the initial conditions or how to get the result they have got?
which is
##\frac{1}{k} ( 1-e^{-2kr\pi} ) ##
In equation 16 there are some other factors, ##M_{pl}## and ##M## which are Planck's scales at different dimensions.
Any help is appreciated!