What does it mean when they say the Gauge Sector of SM?

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In summary, the Gauge Sector of the Standard Model (SM) describes the fundamental forces of nature and their interactions between particles. These forces include the strong nuclear force, the weak nuclear force, the electromagnetic force, and the gravitational force. The behavior of particles is explained through the exchange of gauge bosons and described by mathematical equations called gauge theories. When physicists say the Gauge Sector is "broken", they are referring to spontaneous symmetry breaking, which leads to the acquisition of mass by particles and the emergence of different interactions. The Gauge Sector is closely related to the Higgs boson, which gives particles their mass through electroweak symmetry breaking and was discovered in 2012 by the Large Hadron Collider at CERN.
  • #1
alemsalem
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what does it mean when they say the Gauge "Sector" of SM?

what other sectors are there?

Thanks
 
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I guess they (who are they?) mean the gauge field sector, i.e. the terms in the Lagrangian where only the field strength tensors appear as F² (for the electro-weak gauge fields and the gluon fields).

The other sectors would be
a) the fermionic sectors (where we have the kinetic terms of the fermions plus the interaction with the gauge field)
b) the Higgs sector (where we have the Higgs kinetic term, teh mass term, plus its couplings to all other fields)
 

1. What is the Gauge Sector of the Standard Model (SM)?

The Gauge Sector of the Standard Model refers to the part of the model that describes the fundamental forces of nature. These forces are mediated by particles known as gauge bosons, which are responsible for interactions between particles.

2. What are the fundamental forces in the Gauge Sector of the SM?

The fundamental forces in the Gauge Sector of the SM are the strong nuclear force, the weak nuclear force, the electromagnetic force, and the gravitational force. These forces are responsible for all interactions between particles and play a crucial role in the behavior of matter.

3. How does the Gauge Sector of the SM explain the behavior of particles?

The Gauge Sector of the SM explains the behavior of particles through the exchange of gauge bosons. These particles carry the fundamental forces and allow particles to interact with each other. The behavior of particles is described by mathematical equations known as gauge theories.

4. What does it mean when physicists say the Gauge Sector is "broken"?

When physicists say the Gauge Sector is "broken", they are referring to a phenomenon known as spontaneous symmetry breaking. This occurs when the symmetry of the gauge bosons is broken, leading to the acquisition of mass by some particles and the emergence of different interactions between particles.

5. How does the Gauge Sector of the SM relate to the Higgs boson?

The Gauge Sector of the SM is closely related to the Higgs boson, which is responsible for giving particles their mass through the process of electroweak symmetry breaking. The Higgs boson is a fundamental particle predicted by the SM and was discovered in 2012 by the Large Hadron Collider at CERN.

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