Relative Mean lifetime of decays

In summary, the conversation discusses how to compare the mean lifetimes of two particles with known reaction formulas. They also mention that the first interaction typically has a shorter mean lifetime compared to a weak interaction. The possibility of comparing lifetimes using particle mass and the use of QFT are also mentioned. However, it is noted that comparing lifetimes without a full calculation may depend on the specific situation. The two examples given in the conversation are considered to be completely different.
  • #1
Xico Sim
43
4
Hi there.

I want to compare the mean lifetimes of two particles which decay in a way given by two known reaction formulas, such as

##\rho^0 \rightarrow \pi^+ + \pi^-## and ##\Xi^- \rightarrow \Lambda^0 + \pi^-##

In this case it's easy: since the first one corresponds to a first interaction and the second one to a weak interaction, the first one has a shorter mean lifetime. If, for instance, both were weak, could we still compare the lifetimes (using the particles mass, for example)?
 
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  • #2
You can always calculate the lifetime with QFT. If two decays are similar, there might be rules to compare them without a full calculation, but that depends on the specific situation then. The two examples you have here are completely different.
 

Related to Relative Mean lifetime of decays

1. What is the definition of relative mean lifetime of decays?

The relative mean lifetime of decays is a measure of how long, on average, a particle or system will decay before reaching a stable state. It is calculated by taking the ratio of the average lifetime of a particle to the average lifetime of its decay products.

2. How is relative mean lifetime of decays related to half-life?

The relative mean lifetime of decays and half-life are related, as they both measure the rate at which a particle or system decays. However, half-life specifically refers to the time it takes for half of a sample to decay, while the relative mean lifetime of decays takes into account the average lifetimes of all the particles in a sample.

3. How is the relative mean lifetime of decays measured in experiments?

The relative mean lifetime of decays is typically measured using particle detectors and accelerators, which track the decay of particles and record the time it takes for them to reach a stable state. These measurements are then used to calculate the average lifetime and relative mean lifetime of the decaying particles.

4. What factors can affect the relative mean lifetime of decays?

The relative mean lifetime of decays can be affected by various factors, including the type of particle, the energy of the particle, and any external influences or interactions that may alter the decay process. Additionally, the relative mean lifetime of decays may vary depending on the specific decay mode being observed.

5. Why is the concept of relative mean lifetime of decays important in particle physics?

The relative mean lifetime of decays is an important concept in particle physics because it helps scientists understand the behavior of particles and their interactions. It also allows for the prediction and study of decay processes, which are crucial in understanding the fundamental properties of matter and the universe.

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