Well I am having some difficulty in understanding the running constants... I am not sure if this applies to the Standard Model as well, but I saw that in SUSY recently...(adsbygoogle = window.adsbygoogle || []).push({});

If we take the value of the gaugino masses [itex]m_{\bar{g}},m_{\bar{W}},m_{\bar{B}}[/itex] (by bar I mean Gluino,W-ino and B-ino) to be equal at some energy scale (~M_{GUT}) then we can go to lower energy scales (let's say at TeV) to find their ratio:

[itex]m_{\bar{g}}:m_{\bar{W}}:m_{\bar{B}}≈6:2:1[/itex]

I guess this ratio depends on the model.

My problem is that I don't understand how we can do that, in the case the SuSy breakdown occurs at lower energies than M_GUT... While SuSy is unbroken, the gauginos will have to be massless, right? If the breakdown occurs at around 2TeV let's say, then it's meaningless to speak about their masses...

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# Running constants

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