Recent content by maani

Hi Bill, thanks for your answer! To your questions: 2.The total of the numbers has to be exactly 1.0!I know strictly speaking these numbers are not random but I just don't know how to call them. 3. I have to do this more than once, so it has to be done relatively quickly. 1. As for...

Hi everyone, I am trying to generate 200 random numbers from an exponential distribution which have to add to one. I guess I need a loop where in each step I generate a random number from the exponential distribution and check the sum, if it is less than one I add the number to a list and if...

Hi I can't find a Feynman rule for the coupling of two Z bosons to a photon. Does the Z boson couple to a photon at all?

Hi, did I understand this correct: The Yukawa matrices are the couplings of the particles to the Higgs filed. They are in general not diagonal, but could be diagonalized by proper unitary matrices. The physical masses of the particles are the eigenvalues of that diagonal matrix .

Hi everyone! Can somebody briefly explain me what the GIM Mechanism (Glashow, Iliopoulos, and Maiani) is and why does it not allow FCNC transitions at tree level. Thanks in advance!

Hi I found the answers I needed. For those who are interested in RS models or Extra Dimensions this is a very good introduction: http://arxiv.org/abs/hep-ph/0409309

Hi, I have been studied the Randall Sundrum Model for a while (original paper: hep-ph/9905221), but I don't come forward with it. So far I understood: In the RS model the four dimensional Minkowskian spacetime is expanded by a fifth dimension, which is compactified on an orbifold S1/Z2. What...

Hi, I have a question about extra dimensions. I don't understand what means that a dimension is compactified. Thanks a lot! Sorry it's the wrong forum. It belongs to Beyond the Standard Model , but I don't know how to remove it!

Thanks to all of you for the fast answers. This was really my first computation and it was completely wrong. I am still working on it. But i have learned at least how to convert the units.

Hi I have computed a cross section to 10-6 GeV2. Now I have to convert it to barn, but don't know how. Can anybody help me? Is it ok to have a cross section in units of GeV2 or is my result completely wrong? Thanks!