Explaining Cabibbo Suppression: What is it & How Does it Work?

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In summary, Cabibbo suppression is a phenomenon in particle physics where certain decays, due to the connections between quarks, are not as favored as others. This was originally observed in decays involving three quarks and now also applies to six quark systems. Decays that require two s quarks or no s quarks are considered Cabibbo suppressed and are rare. This concept was first described by Nicola Cabibbo in the 1960s and can be seen in the paper "Search for CP Violation in Charged D Meson Decays."
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Joe1
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Hi,

Could someone briefly explain Cabibbo suppression to me? I can't seem to find any info on it. Is it like OZI supression where things that decay through 3 gluons are suppressed?

I found it in the paper "Search for CP Violation in Charged D Meson Decays" accessible here:
http://arxiv.org/abs/hep-ex/9612005"

Thanks,
Joe
 
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Originally, with three quarks (when Cabibbo was young), Cabibbo suppression meant that the u-s and d-s weak coupling was smaller than the u-d weak coupling. Now, with six quarks, Cabibbo suppression refers to decays that are not the most favored, because of the quark connections. Cabibbo favored decay of the D would have its c quarik decay to one s quark. All the decays they show need either two s quarks or none. In this sense, they are Cabibbo suppressed and are rare decays.
 
  • #3
That makes sense. Thanks!
 

What is Cabibbo Suppression?

Cabibbo Suppression is a phenomenon in particle physics where certain types of particles are less likely to decay into other particles. It was first proposed by Italian physicist Nicola Cabibbo in the 1960s as a way to explain the unequal decay rates of certain types of particles.

How does Cabibbo Suppression work?

Cabibbo Suppression works by introducing a mathematical factor called the Cabibbo angle into the equations that describe particle decay. This angle represents the strength of the interaction between different types of particles. By adjusting this angle, it is possible to explain why certain particles decay more quickly than others.

What are the consequences of Cabibbo Suppression?

The most significant consequence of Cabibbo Suppression is that it allows us to better understand and predict the decay rates of particles. It also helps to explain why certain types of particles are more stable than others, which is important for understanding the behavior of matter in the universe.

How is Cabibbo Suppression related to the Standard Model of particle physics?

Cabibbo Suppression is a fundamental part of the Standard Model, which is the current theory that describes the behavior of particles and their interactions. The introduction of the Cabibbo angle into the equations of the Standard Model has been crucial in making accurate predictions and explaining experimental results.

Are there any practical applications of Cabibbo Suppression?

While Cabibbo Suppression is primarily a theoretical concept, it has practical applications in areas such as nuclear physics and particle accelerators. It also helps us to better understand the fundamental forces and interactions that govern the behavior of matter, which could potentially lead to future technological advancements.

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