A Why don't we see super-symmetric particles?

[Rfael]

we can se many particles, also we can detect and produce antimatter

however my question is why even at high energies we can not see any supersymmetric partner of a particle ?

 

[Orodruin]

Supersymmetry is not an experimentally verified theory. There are two possibilities:

1 The SUSY scale is significantly higher than many would have argued before LHC or otherwise hidden.
2 SUSY does not exist.

 

[Meir Achuz]

I vote for 2.

 

[Orodruin]

I vote for 2.

If only it was a voting game ...

 

[Vanadium 50]

Vote early and vote often.

There is also the possibility that the spectrum is such that it is just too hard to see. For example, if you had a stop squark just a little heavier than the top quark and only a moderately heavy LSP, you'd produce a few percent extra events that looked like top-antitiop, possibly with a smidgen more missing energy. Hard to spot and very hard to spot if you aren't specifically looking for it,

 

[Orodruin]

There is also the possibility that the spectrum is such that it is just too hard to see.

I tried to include things like this in 1 with the ”otherwise hidden” to not make it too long …

 

[Vanadium 50]

While there is a whole cottage industry of people who propose hiding places - an industry of which I am not part - having a stop mass near the top mass has some desirable features. Apart from being difficult to disprove. It's not just hard to find.

There is a paper in preparation by one of the LHC experiments that may soon shed some light on this region. Maybe in a month or two it will be in print.