How were the properties of the Higgs boson accuratly predicted?

In summary, the laws of quantum mechanics were used to predict the decay of the higgs boson into various particles, including 2 photons or 4 electrons. This is because the higgs boson couples to all fermions and gauge bosons through Yukawa terms in the Lagrangian. The preference for certain decay channels depends on the mass of the higgs boson. However, there are many other possible decay channels that are experimentally more difficult to observe. The specific probabilities of each decay channel are determined by calculations in quantum field theory.
  • #1
KarminValso1724
25
1
What I mean by this is how were the laws of quantum mechanics used to predict that the higgs boson would decay into 2 photons or 4 electrons. I understand that the higgs boson transmits the higgs field, but why would a particle that transmits the higgs field have to decay in that wayand not some other way, why not decay into other particles. Same question with all of the other properties of it that were accuratly predicted.
 
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  • #2
Oh boy...you should have just asked for a good textbook on particle physics or quantum field theory.
 
  • #3
 
  • #4
In a few lines...
I don;t like the view that 'higgs boson transmits the higgs field'... I find it unnecessarily confusing.
Now to your main point; the Higgs Boson does not decay only in photons or 4 leptons...
the Higgs boson by theory couples to all the fermions through Yukawa terms in the Lagrangian and to gauge bosons (like WW or ZZ). So it couples to quarks, leptons and gauge bosons... the quarks and gluons are important because that's how the Higgs boson is produced in the first place [when the protons collide]... It then can decay to several channels... it was the photon channel and the ZZ (that results to 4 leptons] that was first observed because if I recall well they give the clearest signal...
To what the Higgs Boson prefers to couple to depends on its mass, see eg Fig 11.4 here:
https://pdg.web.cern.ch/pdg/2015/reviews/rpp2015-rev-higgs-boson.pdf
with [itex]b\bar{b}[/itex] being the dominant decay products of the Higgs...However most of the decays to "QCD" objects (like quarks or gluons or taus), that are seen by the detector as "jets", have a very strong QCD background. I believe eversince the Higgs was discovered more channels were used/observed... one I am sure about is the [itex]\tau^+\tau^-[/itex].

Now if your question is why it couples to all these; well you need to take some Particle Physics course... the main idea is that everything couples to everything as long as a symmetry permits it, and if it doesn't then you have to find a good reason why not.
 
  • #5
There are many decay channels. All channels that do not violate conservation laws happen with some probability. Two photons or four leptons are actually quite rare, but they are experimentally easier to find than other channels.
The precise numbers are the result of calculations in quantum field theory.
 

Related to How were the properties of the Higgs boson accuratly predicted?

What is the Higgs boson and why is it important?

The Higgs boson is a subatomic particle that helps explain the origin of mass in the universe. Its discovery in 2012 confirmed the existence of the Higgs field, a fundamental force field that gives particles mass. Understanding the Higgs boson is important in our understanding of the fundamental forces that govern the universe.

How were the properties of the Higgs boson predicted?

The properties of the Higgs boson were predicted using mathematical equations and theories, specifically the Standard Model of particle physics. This model describes the fundamental particles and forces in the universe and predicted the existence and properties of the Higgs boson.

What methods were used to accurately predict the properties of the Higgs boson?

Scientists used data from particle accelerators, such as the Large Hadron Collider, to study the collisions of particles and observe the production and decay of the Higgs boson. They also used computer simulations and mathematical models to predict how the particle would behave and interact with other particles.

How do we know that the predicted properties of the Higgs boson are accurate?

The discovery of the Higgs boson in 2012 confirmed that the predicted properties were accurate. Scientists analyzed the data from particle collisions and were able to observe the expected behavior and interactions of the Higgs boson. This discovery was a major breakthrough in particle physics and provided strong evidence for the accuracy of the predictions.

What impact does the accurate prediction of the properties of the Higgs boson have on our understanding of the universe?

The accurate prediction of the properties of the Higgs boson has greatly advanced our understanding of the fundamental forces and particles in the universe. It has also confirmed the validity of the Standard Model and opened up new possibilities for further research and discoveries in particle physics.

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