Rare decays of mesons for new physics

In summary, semi-leptonic decays of mesons involving neutrinos are considered a clean signal for new physics due to their lack of hadronic complexities and electromagnetic interference. Rare decays, such as those involving two muons, are also promising for detecting new physics. Additionally, weak processes are often simpler to calculate.
  • #1
shakeel
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Why the semi-leptonic decays of mesons involving neutrinos are consider as clean signal for new Physics. As for as I think these are free from hadronic complexities (because we do not know exactly about strong interactions) and electromagnetic interference (because neutrinos do not couple to photons ). Can anyone guide me or correct me in this regard.
Thanks
 
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  • #2
Decays which can occur via the strong interaction are dominated by SM physics (the strong interaction), you don't see small contributions from new physics (if present).
You need some weaker processes - rare decays. Semileptonic decays are one possibility there, the decays to two muons are even better, and some hadronic decays are interesting, too.
In addition, weak processes are often easier to calculate.
 

1. What are rare decays of mesons?

Rare decays of mesons refer to the decay of a meson particle into another particle or particles with a low probability or branching ratio. These decays are rare because they are governed by processes that are highly suppressed in the Standard Model of particle physics.

2. Why are rare decays of mesons important for new physics?

Rare decays of mesons are important because they can provide insights into new physics beyond the Standard Model. These decays can reveal the presence of new particles or interactions that are not predicted by the Standard Model, and can help us understand the fundamental nature of matter and the universe.

3. What is the role of the Large Hadron Collider (LHC) in studying rare decays of mesons?

The LHC is the world's largest and most powerful particle accelerator, and it plays a crucial role in studying rare decays of mesons. The LHC collides protons at high energies, which can produce a large number of meson particles. By analyzing the decay products of these mesons, scientists can search for rare decays and gather data to study their properties.

4. How do scientists search for rare decays of mesons?

Scientists use a variety of experimental techniques to search for rare decays of mesons. These include studying the decay products of mesons produced in high-energy collisions, searching for specific signatures or patterns in the data, and using advanced statistical analysis to identify rare events that may indicate the presence of new physics.

5. What potential implications could rare decays of mesons have for our understanding of the universe?

If rare decays of mesons are observed, it could have significant implications for our current understanding of the universe. It could provide evidence for new particles or interactions, and could help us explain phenomena such as dark matter and the matter-antimatter asymmetry in the universe. It could also guide the development of new theories and models to better describe the fundamental nature of matter and the universe.

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