Why don't we see super-symmetric particles?

In summary, the absence of super-symmetric particles, which are predicted by super-symmetry theory, may be attributed to several factors including their high mass, making them difficult to detect with current particle accelerators. Additionally, if super-symmetry exists, it could manifest at energy levels beyond those currently accessible, or the particles might decay rapidly, evading observation. Furthermore, the parameters of the theory may not align with observed phenomena, leading to implications that suggest super-symmetry is not realized in our universe.
  • #1
Rfael
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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 ?
 
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  • #2
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.
 
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  • #3
I vote for 2.
 
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  • #4
Meir Achuz said:
I vote for 2.
If only it was a voting game ... :wink:
 
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  • #5
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,
 
  • #6
Vanadium 50 said:
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 … 🤔
 
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  • #7
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.
 
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FAQ: Why don't we see super-symmetric particles?

What is supersymmetry?

Supersymmetry is a theoretical framework in particle physics that proposes a symmetry between fermions (particles that make up matter) and bosons (particles that mediate forces). For every known particle, there would be a corresponding superpartner with different spin properties. This theory aims to address several unresolved issues in the Standard Model of particle physics, such as the hierarchy problem and the nature of dark matter.

Why haven't we detected super-symmetric particles yet?

There are several reasons why super-symmetric particles have not been detected. One possibility is that they are much heavier than the particles we currently know, requiring higher energy levels to produce them than what current particle accelerators, such as the Large Hadron Collider (LHC), can achieve. Another reason could be that the interactions of these particles with ordinary matter are extremely weak, making them difficult to detect with existing technology.

Could super-symmetric particles still exist if we haven't found them?

Yes, super-symmetric particles could still exist even if we haven't found them yet. The lack of detection does not rule out their existence; it may simply indicate that our current experimental setups are not sensitive enough to detect them. Future experiments with more powerful accelerators or more sensitive detectors could potentially discover these particles.

What would the discovery of super-symmetric particles mean for physics?

The discovery of super-symmetric particles would be a groundbreaking event in physics. It would provide strong evidence for supersymmetry, potentially solving several outstanding problems in the Standard Model. It could also offer insights into the nature of dark matter, as some super-symmetric particles are candidates for dark matter particles. Additionally, it would open up new avenues of research in both theoretical and experimental physics.

What are the current efforts to detect super-symmetric particles?

Current efforts to detect super-symmetric particles primarily involve experiments at high-energy particle colliders like the Large Hadron Collider (LHC) at CERN. Researchers are also developing more sensitive detectors and conducting indirect searches through astrophysical observations and experiments designed to detect dark matter. These efforts are complemented by theoretical work to refine models of supersymmetry and predict where and how these particles might be found.

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