Half-spin baryons with identicle quarks?

In summary, there are indeed spin 1/2 versions of the ##\Delta## particles, which are in different orbital angular momentum states compared to the lightest ##\Delta##. The known ##\Omega## states also have 1/2 spin, but their angular momentum has not been well measured due to their short lifespan and messy decays. This is likely due to the fact that the color wave function is antisymmetric, the flavor is symmetric, and the spin must also be symmetric for a composite particle.
  • #1
bsaucer
30
0
Do any 1/2 spin baryons exist that are made of three identical (flavored) quarks? I know the Δ-, Δ++ and Ω- have 3/2 spin. If the 1/2 spin versions of these particles can't exist, then why not?
 
Physics news on Phys.org
  • #2
The color wave function is totally antisymmetric, the flavor is totally symmetric, so that the spin has to be totally symmetric.
 
  • #3
Spin of a composite particle is best identified with the total angular momentum J = L + S, where L and S are the "orbital" and spin angular momentum of the constituents. There are indeed spin 1/2 versions of the ##\Delta## particles, which are in different orbital angular momentum states compared to the lightest ##\Delta##. A list can be found here: http://pdglive.lbl.gov/listing.brl?fsizein=1&exp=Y&group=BXXX020 . The known ##\Omega## states are listed at http://pdglive.lbl.gov/listing.brl?fsizein=1&exp=Y&group=BXXX035 . It doesn't appear that their angular momentum has been well measured. Presumably they are too short-lived, or their decays too dirty to make this easy, but I am no experimentalist.
 
Last edited by a moderator:

1. What are half-spin baryons with identical quarks?

Half-spin baryons with identical quarks are a type of subatomic particle that is composed of three quarks with the same flavor. These baryons have a half-integer spin, meaning that they have a spin of either 1/2 or 3/2. They are a type of hadron, which are particles made up of quarks and held together by the strong nuclear force.

2. How are half-spin baryons with identical quarks different from other baryons?

Half-spin baryons with identical quarks are unique because they have three quarks with the same flavor, whereas other baryons have three quarks with different flavors. This makes them more symmetric in terms of their quark composition and can affect their properties, such as their mass and spin.

3. What is the significance of the spin of half-spin baryons with identical quarks?

The spin of a particle is an intrinsic property that affects its behavior and interactions with other particles. Half-spin baryons with identical quarks have a spin of 1/2 or 3/2, which can influence how they interact with other particles and how they decay. The spin can also provide information about the underlying structure of these particles.

4. How are half-spin baryons with identical quarks studied and observed?

Half-spin baryons with identical quarks are studied and observed using particle accelerators, which allow scientists to create and collide particles at high energies. By analyzing the particles produced in these collisions, scientists can identify and study half-spin baryons with identical quarks and their properties.

5. What is the current understanding of half-spin baryons with identical quarks?

Half-spin baryons with identical quarks are still being studied and their properties are not fully understood. However, they play an important role in our current understanding of the Standard Model of particle physics and are being studied in experiments all over the world. Further research and experiments are needed to fully understand these particles and their role in the universe.

Similar threads

  • High Energy, Nuclear, Particle Physics
Replies
1
Views
1K
  • High Energy, Nuclear, Particle Physics
Replies
3
Views
3K
  • High Energy, Nuclear, Particle Physics
Replies
7
Views
504
  • High Energy, Nuclear, Particle Physics
Replies
7
Views
1K
  • High Energy, Nuclear, Particle Physics
Replies
1
Views
1K
  • High Energy, Nuclear, Particle Physics
Replies
2
Views
2K
  • High Energy, Nuclear, Particle Physics
Replies
1
Views
1K
  • High Energy, Nuclear, Particle Physics
Replies
4
Views
2K
  • High Energy, Nuclear, Particle Physics
Replies
4
Views
1K
  • High Energy, Nuclear, Particle Physics
Replies
13
Views
2K
Back
Top