Parity Violation in Weak Decay

In summary, the conversation discussed the concept of parity and parity violation in quantum physics. Parity violation is when certain experiments behave differently in their mirror image form. This can be hard to understand mathematically and is related to the concept of right-handed and left-handed particles. The Wu experiment was mentioned as an example of parity violation and it is better explained in books rather than forum posts. The mathematical description of parity violation has to do with historical remarks and the V-A theory, which uses two-component spinors to differentiate between right and left-handed particles.
  • #1
svrphy
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I just came across the following Quote in an introductory Quantum physics book"There are certain experiments in which behave differently in their mirror image form, this is called the Parity Violation in." Can anybody explain in detail what parity violation is and what mathematical description is used for it. I just had an introductory level course in Quantum Mechanics so Can this be a hard thing to understand mathematically ? I remember having possibly coming across something called a Right Handed Particle & a Left Handed Particle in this Context. Can anybody detail this as well (if my terminology is correct):redface:
 
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  • #2
Parity and parity violation is too much to explain in detail in forum posts, books would be better.
A simple example of parity violation is the Wu experiment.
 
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Can this be a hard thing to understand mathematically ? I remember having possibly coming across something called a Right Handed Particle & a Left Handed Particle
yes,it is hard to understand it mathematically.Parity is conserved with electromagnetic interaction but it is not the case with weak decay.The neutrinos for example in weak decay has a certain chirality i.e. neutrino and antineutrino comes with direction of spin opposite always in weak decay.So now it is possible to differentiate between a mirror image world and say real world.you can tell which hand is right and which is left.The mathematics of it has to do with some historical remarks which was used first by fermi to write an interaction hamiltonian for weak decay.After too many years it became accepted as V-A theory which does not conserve parity.it has property that it uses two component spinors which corresponds to a particular hand however it can be written in terms of 4 spinors
 
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FAQ: Parity Violation in Weak Decay

1. What is parity violation in weak decay?

Parity violation in weak decay refers to a phenomenon observed in certain types of radioactive decays, where the resulting particles do not exhibit mirror symmetry, or parity, as expected according to the laws of physics. This indicates a violation of the principle of parity conservation, which states that physical laws should be the same for particles and their mirror images.

2. How was parity violation in weak decay discovered?

Parity violation in weak decay was first observed in 1956 by physicists Tsung-Dao Lee and Chen Ning Yang during an experiment on beta decay of cobalt-60. They noticed that the emitted electrons were not distributed equally in all directions, as would be expected if parity was conserved. This discovery led to a Nobel Prize in Physics for Lee and Yang in 1957.

3. What causes parity violation in weak decay?

Parity violation in weak decay is caused by the weak nuclear force, one of the four fundamental forces of nature. This force is responsible for certain types of radioactive decays, and it is the only known force that violates the principle of parity conservation. It is believed that this violation is due to the asymmetry in the weak force interactions between particles and their antiparticles.

4. What are some practical applications of studying parity violation in weak decay?

The study of parity violation in weak decay has important implications in particle physics and cosmology. Understanding this phenomenon helps us gain a deeper understanding of the fundamental forces and particles that make up our universe. It also has practical applications, such as in the development of sensitive detectors for measuring weak interactions and in the search for new physics beyond the Standard Model.

5. Can parity violation in weak decay be reversed or manipulated?

No, parity violation in weak decay cannot be reversed or manipulated. It is a fundamental property of the weak nuclear force, and it has been observed in numerous experiments. However, scientists continue to study and explore ways to better understand this phenomenon and its implications in our understanding of the universe.

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