Spin Correlation: Exploring its Relation to Narrow Width Approximation

In summary, spin correlation is a phenomenon in particle physics that relates the spins of two particles. It is important in understanding subatomic particles and plays a crucial role in the narrow width approximation. Techniques such as scattering experiments and polarization measurements are used to study spin correlation. It is significant in particle physics as it provides insights into fundamental properties and interactions of particles. Current research areas related to spin correlation include studies of top quark spin correlation, investigations in heavy ion collisions, and searches for deviations from the Standard Model predictions.
  • #1
Safinaz
258
8
Hi all,

Do anyone know what is the spin correlation and what its relation to theNarrow Width Approximation.

Regards,
Safinaz
 
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  • #2
Spin correlations in what context?

Presumably you want to know about dileptons from ttbar or something similar? (based on previous posts)

The leptons retain information about the production state of ttbar, which then weak decays (with handedness) to leptons.This can be seen by looking at variables like the delta phi between two leptons in decay.

You should probably search arxiv for a primer or look at a standard model textbook.
 
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1. What is spin correlation?

Spin correlation is a phenomenon in particle physics where the spins of two particles are related to each other, either through a direct interaction or through the decay of a parent particle. It is an important concept in understanding the behavior and properties of subatomic particles.

2. How is spin correlation related to narrow width approximation?

In the narrow width approximation, the width of a resonance in a particle's energy spectrum is much smaller than its mass. This assumption is often used in particle physics experiments to simplify calculations. Spin correlation plays a crucial role in this approximation, as it allows for the identification and measurement of particles with similar masses but different spins.

3. What techniques are used to study spin correlation?

There are several experimental techniques used to study spin correlation, including scattering experiments, angular distribution measurements, and polarization measurements. These techniques allow for the determination of the spin states of particles and their correlations with each other.

4. Why is spin correlation important in particle physics?

Spin correlation is important in particle physics because it provides insights into the fundamental properties and interactions of subatomic particles. It also allows for the identification and classification of particles, which is crucial for understanding the structure of matter and the forces that govern it.

5. What are some current research areas related to spin correlation?

Current research in spin correlation includes studies of top quark spin correlation in proton-proton collisions, investigations of spin correlation in heavy ion collisions, and searches for possible deviations from the Standard Model predictions of spin correlation. Additionally, spin correlation is being studied in the context of dark matter and its possible interactions with known particles.

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