Comparing D0 Decay Rates: K(-) + (pi)(+) vs. K(-) + e(+) + (v_e)

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In summary, the conversation discusses the rates of two different decays: D0 to K(-) + (pi)(+) and D0 to K(-) + positron + electron-flavor neutrino. The speaker is unsure of what would make one of these decays occur at a greater rate than the other. The provided links offer further information on these decays and their branching fractions.
  • #1
holly56
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Which of the following should occur at a greater rate: D0 to K(-) + (pi)(+) OR D0 to K(-) + positron + electron-flavor neutrino?
I know that there are other decays that are Cabibbo supressed (or doubly so) but I can't see what would make one of these more likely than the other.
Thanks
 
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  • #3
I think the pdglive-tables are easier to use:
http://pdglive.lbl.gov/Rsummary.brl?nodein=S032&inscript=Y&sub=Yr&return=MXXX035

They have a similar branching fraction, and the different phase space can lead to differences.
 
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FAQ: Comparing D0 Decay Rates: K(-) + (pi)(+) vs. K(-) + e(+) + (v_e)

1. What is the purpose of comparing D0 decay rates?

The purpose of comparing D0 decay rates is to understand the differences in the decay mechanisms and the fundamental interactions involved in the decay process. This can provide insights into the underlying physics and help in testing the predictions of the Standard Model of particle physics.

2. What is the significance of comparing K(-) + (pi)(+) vs. K(-) + e(+) + (v_e) decay rates?

Comparing these two decay rates allows us to study the weak interaction, which is responsible for the decay of the D0 particle. By comparing the decay rates involving different particles, we can gain a deeper understanding of the underlying physics and test the predictions of the Standard Model.

3. How are the decay rates of K(-) + (pi)(+) vs. K(-) + e(+) + (v_e) measured?

The decay rates are measured using data from particle colliders, such as the Large Hadron Collider (LHC). Scientists analyze the collision data and use statistical methods to determine the number of each type of decay that occurs. The ratio of these numbers gives the decay rates.

4. What factors can affect the decay rates of K(-) + (pi)(+) vs. K(-) + e(+) + (v_e)?

The decay rates can be affected by various factors, such as the mass and spin of the particles involved, the strength of the weak interaction, and the presence of other particles in the decay process. The experimental conditions and techniques used to measure the decay rates can also have an impact.

5. What implications could the results of comparing K(-) + (pi)(+) vs. K(-) + e(+) + (v_e) decay rates have?

The results could have significant implications for our understanding of the fundamental interactions and the Standard Model of particle physics. If the results differ significantly from the predictions, it could indicate the presence of new particles or interactions that are not accounted for in the Standard Model. This could lead to further research and advancements in our understanding of the universe.

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