Difference between 2to2 interactions

In summary, 2to2 interactions refer to interactions between two particles, where each particle interacts with the other. This is different from 1to1 interactions, where only one particle interacts with another, or 3to3 interactions, where three particles interact with each other simultaneously. The strength of a 2to2 interaction can be measured by calculating the force between the two particles involved. These interactions can cause particles to attract or repel each other, leading to the formation of stable structures or the breaking apart of systems. While 2to2 interactions are not the only type of interactions that occur in nature, they play a crucial role in determining the behavior of particles and can be observed and studied in a laboratory setting using techniques such as
  • #1
ChrisVer
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What is the difference between these interactions?
[itex] a+b \rightarrow c+d[/itex]
and
[itex] b+a \rightarrow d+c [/itex]
?

I was reading the "State-of-the-art formulas for helicity amplitude calculation and all that" ver 2.4, part Ia. - Spherical-vector method for helicity amplitudes (Formalism), by Ken-Ichi Hikasa.
In the discrete symmetry and helicity amplitudes sector (pg 5) he gives different invariant matrices [itex]M[/itex] forms for these two above.
 
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  • #2
Are you SURE there is no difference between the notation in the two equations, ONLY the ordering? (such as a helicity index change?) He doesn't reference two different diagrams? (s and t channel?)
 

1. What is the difference between 2to2 interactions and other types of interactions?

2to2 interactions refer to interactions between two particles, where each particle interacts with the other. This is different from 1to1 interactions, where only one particle interacts with another, or 3to3 interactions, where three particles interact with each other simultaneously.

2. How do we measure the strength of a 2to2 interaction?

The strength of a 2to2 interaction can be measured by calculating the force between the two particles involved. This force is typically described by a mathematical formula, such as Newton's law of gravitation or Coulomb's law.

3. Are 2to2 interactions the only type of interactions that occur in nature?

No, there are many different types of interactions that occur in nature, including 2to3, 2to4, and so on. These interactions involve different numbers of particles and can have varying strengths and effects.

4. How do 2to2 interactions affect the behavior of particles?

2to2 interactions play a crucial role in determining the behavior of particles in systems such as atoms, molecules, and even larger structures like planets and galaxies. These interactions can cause particles to attract or repel each other, leading to the formation of stable structures or the breaking apart of systems.

5. Can 2to2 interactions be observed and studied in a laboratory setting?

Yes, scientists can study 2to2 interactions in a laboratory by using techniques such as particle accelerators and colliders, which allow them to recreate and observe these interactions in controlled environments. This helps researchers better understand the fundamental building blocks of the universe and their interactions.

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