Susy transforrnations & gso projection

In summary, the relationship between SUSY transformations and GSO projection in superstring theory is that GSO projection can eliminate certain states, such as the tachyon, while also providing supersymmetry. In some cases, additional SUSY transformations may still be necessary, but the theory must first be GSO projected in a suitable manner. The term "the" GSO projection can be misleading, as there are many other possible projections, most of which are not supersymmetric.
  • #1
lkwarren01
9
0
I'm a little confused about the relaionship between susy transformations involving Q generators & gso projection in superstring theory. If gso projection is used in RNS sectors, does that only eliminate certain states, such as tachyon, then susy must still be applied?

Or does gso projection inherently provide supersymmetry, so that no additional transformation is required?

Finally, if both must be used together, which goes first?

Thanks
Larry Warren
 
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  • #2
lkwarren01 said:
Or does gso projection inherently provide supersymmetry, so that no additional transformation is required?

Inherently. What is usually called "the" GSO projection is a projection that happens to produce a SUSY spectrum. Many other projections are possible and most are not supersymmetric. This nomenclature dates back to the old days and is perhaps somewhat confusing indeed.
 
  • #3
Does that mean if GSO projection is used, no other SUSY transformation is needed?
Thanks for your help
 
  • #4
I am not sure what you mean with "other SUSY transformation"...certainly you can do Susy transformations, if the theory has been GSO projected in a suitable manner, and it is invariant under such transformations.
 
  • #5
thank you
 

1. What are Susy transformations?

Susy transformations, short for super-symmetry transformations, are mathematical operations that relate two different types of particles, namely bosons and fermions. They are a key concept in super-symmetry theories, which aim to explain the relationship between these two fundamental types of particles in the universe.

2. How are Susy transformations related to GSO projection?

GSO projection, short for Gliozzi-Scherk-Olive projection, is a mathematical tool used in super-symmetry theories to select only certain states that are compatible with certain symmetries. Susy transformations are closely related to GSO projection as they help identify the states that are invariant under these transformations.

3. Why are Susy transformations important in theoretical physics?

Susy transformations are important in theoretical physics as they provide a link between bosons and fermions, which are two fundamental types of particles in the universe. They also play a crucial role in super-symmetry theories, which aim to unify different forces and explain the discrepancies between different physical theories.

4. Can Susy transformations be observed in nature?

Currently, there is no direct evidence of Susy transformations in nature. However, many physicists continue to study and research super-symmetry theories in the hopes of finding experimental evidence for these transformations.

5. How do Susy transformations affect our understanding of the universe?

Susy transformations play a critical role in super-symmetry theories, which aim to explain the relationship between different fundamental particles and forces in the universe. If these transformations are confirmed, they could lead to a deeper understanding of the laws of nature and provide a more complete picture of the universe.

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