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What Does It Hateful For String Theory That The Lhc Has Non Seen Supersymmetric Particles?



The LHC information as well as thence far convey non revealed whatever evidence for supersymmetric particles, or whatever other novel particles. For all nosotros know at present, the measure model of particle physics suffices to explicate observations.

There is some adventure that improve statistics which come upwardly amongst to a greater extent than information volition expose some less obvious signal, as well as thence the game isn’t yet over. But it’s non looking proficient for susy as well as her friends.
Simulated dot of dark hole
production as well as decay at the LHC.
[Credits: CERN/ATLAS]

What are the consequences? The consequences for supersymmetry itself are few. The argue is that supersymmetry past times itself is non a really predictive theory.

To laid out with, at that spot are diverse versions of supersymmetry. But to a greater extent than importantly, the theory doesn’t say us what the masses of the supersymmetric particles are. We know they must last heavier than something nosotros would convey observed already, but that’s it. There is nada inward supersymmetric extensions of the measure model which prevents theorists from raising the masses of the supersymmetric partners until they are out of the accomplish of the LHC.

This is too the argue why the no-show of supersymmetry has no consequences for string theory. String theory requires supersymmetry, but it makes no requirements near the masses of supersymmetric particles either.

Yes, I know the headlines said the LHC would probe string theory, as well as the LHC would probe supersymmetry. The headlines were wrong. I am sad they lied to you.

But the LHC, despite non finding supersymmetry or extra dimensions or dark holes or unparticles or what convey you, has taught us an of import lesson. That’s because it is clear right away that the Higgs majority is non “natural”, inward contrast to all the other particle masses inward the measure model. That the majority last natural means, roughly speaking, that getting masses from a calculation should non require the input of finely tuned numbers.

The reckon that the Higgs-mass should last natural is why many particle physicists were confident the LHC would encounter something beyond the Higgs. This didn’t happen, as well as thence the acquaint field of affairs forces them to rethink their methods. There are those who cling to naturalness, hoping it mightiness nevertheless last correct, merely inward a to a greater extent than hard form. Some are willing to throw it out as well as supercede it instead amongst appealing to random adventure inward a multiverse. But most merely don’t know what to do.

Personally I promise they’ll in conclusion come upwardly to a greater extent than or less as well as encounter that they convey tried for several decades to solve a occupation that doesn’t exist. There is nada incorrect amongst the majority of the Higgs. What’s incorrect amongst the measure model is the missing connectedness to gravity as well as a Landau pole.

Be that every bit it may, the community of theoretical particle physicists is currently inward a stage of rethinking. There are of course of teaching those who already struggle a side past times side larger collider is needed because supersymmetry is merely to a greater extent than or less the corner. But the primary impression that I larn when looking at recent publications is a field of confusion.

Fresh ideas are needed. The side past times side years, I am sure, volition last interesting.


I explicate all near supersymmetry, string theory, the occupation amongst the Higgs-mass, naturalness, the multiverse, as well as what they convey to exercise amongst each other inward my upcoming volume “Lost inward Math.”
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