B-L extension of the Standard Model

In summary, the B-L extension of the Standard Model is an extension where Baryon and Lepton numbers are treated as preserved quantities and are promoted to generators of the gauge group. This allows for the extension of the SU(3) colour group to SU(3)xU(1) or SU(4). It should not be confused with L-R extensions, which extend SU(2)xU(1) to SU(2)xSU(2). The simultaneous use of both extensions, from SU(3)xSU(2)xU(1) to SU(4)xSU(2)xSU(2), is an important model. Baez and Huerta have shown a "square" where SO(10) can
  • #1
welatiger
85
0
i need what we mean by B-L extension of the Standard Model ?
 
Physics news on Phys.org
  • #2
A extension where Baryon and Lepton numbers make a prominent rule. In such extensions, the difference between Baryon Number and Lepton Number is recognized as a preserved quantity, and then promoted to some generator of the gauge group. This should be to extend the SU(3) colour group to SU(3)xU(1) or to SU(4)

Do not confuse with L-R extensions, for Left-Right, where SU(2)xU(1) is extended to SU(2)xSU(2).

The simultaneus use of both extensions, from SU(3)xSU(2)xU(1) to SU(4)xSU(2)xSU(2) is a very important model. Baez and Huerta like to show an "square" where SO(1O) can descent either into SU(4)xSU(2)xS(2) or to SU(5), and both of them can go down to SU(3)xSU(2)xU(1). Nice thing.
 

1. What is the B-L extension of the Standard Model?

The B-L extension of the Standard Model is a theoretical framework that adds an additional symmetry to the Standard Model of particle physics. This symmetry, known as B-L, stands for baryon number minus lepton number and helps to explain the observed imbalance between matter and antimatter in the universe.

2. How does the B-L extension of the Standard Model affect the existing particles?

The B-L extension of the Standard Model predicts the existence of new particles, such as the right-handed neutrino and the Z' boson, which have not yet been observed experimentally. It also modifies the properties of existing particles, such as the Higgs boson, and provides a mechanism for neutrinos to acquire mass.

3. What evidence supports the B-L extension of the Standard Model?

While the B-L extension of the Standard Model is still a theoretical framework, there is some evidence that supports its validity. One of the main pieces of evidence is the observed imbalance between matter and antimatter in the universe, which the B-L symmetry helps to explain. Additionally, ongoing experiments at the Large Hadron Collider may provide further evidence for the existence of the predicted new particles.

4. How does the B-L extension of the Standard Model relate to other theories, such as supersymmetry?

The B-L extension of the Standard Model is not mutually exclusive with other theories, such as supersymmetry. In fact, some versions of supersymmetry incorporate the B-L symmetry as part of their framework. However, the B-L extension of the Standard Model is a distinct theory that offers its own explanations for certain phenomena, such as the matter-antimatter asymmetry.

5. Are there any potential implications or applications of the B-L extension of the Standard Model?

If the B-L extension of the Standard Model is proven to be correct, it could have significant implications for our understanding of the fundamental forces and particles in the universe. It could also potentially provide insights into the early universe and the formation of matter. Additionally, the predicted new particles in this theory could have practical applications, such as in technology or energy production.

Similar threads

Replies
5
Views
857
  • Beyond the Standard Models
Replies
2
Views
1K
  • Beyond the Standard Models
Replies
3
Views
1K
  • Beyond the Standard Models
Replies
0
Views
826
  • Beyond the Standard Models
Replies
27
Views
7K
  • Beyond the Standard Models
Replies
30
Views
7K
Replies
32
Views
4K
  • Beyond the Standard Models
Replies
11
Views
2K
  • Beyond the Standard Models
Replies
2
Views
449
  • Beyond the Standard Models
Replies
5
Views
1K
Back
Top