Resonance Concept in Particle Physics: What, Why, How

In summary: NwTkW2LTO8aM&ved=0CDIQQFjAB&ei=5TWVTdSnK4r2sgbS1uy4DQ&biw=1280&bih=680)In summary, a resonance occurs when the scattering probability of particles increases strongly near a certain energy. This can happen via the intermediate formation of a compound particle, which decays again after some time.
  • #1
Deepak247
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What is the true concept of resonance in particle physics? can particle production happen via resonance? how?
 
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In scattering theory, one observes the interaction of two or more particles which are initially and also after the scattering event separated far from each other. There are various constructs which describe the probability that the particles interact with each other (get scattered) and not only pass by each other, like the cross section or the scattering matrix. This probability depends on the energy of the particles and also on the geometry of the (possible) collisison. Now if this scattering probability increases strongly at or near a certain energy, then one speaks of a resonance. A possible mechanism (but not the only one) for a resonance is the intermediate formation of a compound particle which decays again after some time, setting free again the scattering particles (or other ones).
 
  • #3
DrDu said:
Now if this scattering probability increases strongly at or near a certain energy, then one speaks of a resonance. A possible mechanism (but not the only one) for a resonance is the intermediate formation of a compound particle which decays again after some time, setting free again the scattering particles (or other ones).

Typically, such a resonance peak is accompanied by a pole of the associated green's function in the nonphysical sheet, a complex number whose real part defines the resonance energy, and whose imaginary part denotes (up to a constant factor) the decay rate of an associated unstable particle.
 
  • #4

Related to Resonance Concept in Particle Physics: What, Why, How

1. What is resonance in particle physics?

Resonance in particle physics refers to a state where a particle is unstable and can decay into other particles. This occurs when the energy of the particle matches the energy of another particle, allowing them to interact and potentially create new particles.

2. Why is the concept of resonance important in particle physics?

The concept of resonance is important because it helps us understand the fundamental interactions between particles and provides evidence for the existence of new particles. It also allows us to study the properties of particles and their interactions in more detail.

3. How is resonance studied in particle physics?

Resonance is studied using particle accelerators, such as the Large Hadron Collider (LHC), where particles are accelerated to high energies and then collided. The resulting particles are then detected and their properties analyzed to identify any resonant states.

4. What are some real-life applications of resonance in particle physics?

Resonance in particle physics has many real-life applications, such as in medical imaging techniques like MRI, which use the resonance of protons in the body to create images. It is also used in particle therapy for cancer treatment, as well as in the development of new materials and technologies.

5. Are there any unresolved questions or controversies surrounding the concept of resonance in particle physics?

While the concept of resonance is well-established in particle physics, there are still some unresolved questions and controversies surrounding specific resonant states and their properties. For example, the recent discovery of the Higgs boson has raised questions about its role in the mechanism of mass generation and its potential decay modes.

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