If Neutrinos are majorana particles, does this mean lepton number is not conserved?

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Discussion Overview

The discussion centers on the implications of neutrinos being Majorana particles and whether this leads to the non-conservation of lepton number in particle reactions. It explores theoretical aspects, potential experimental evidence, and the behavior of weak interactions regarding matter and antimatter.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Exploratory

Main Points Raised

  • Some participants question whether the classification of neutrinos as Majorana particles implies that lepton number is not conserved in particle reactions.
  • One participant notes that neutrinos are produced in weak interactions, specifically mentioning the role of W bosons.
  • Another participant suggests that neutrinos oscillating between particle and antiparticle states could indicate they are Dirac fermions rather than Majorana fermions, raising doubts about lepton number conservation.
  • Neutrinoless double beta decay is mentioned as a potential experimental example relevant to the discussion of lepton number conservation.
  • There is a proposal that the weak interaction may exhibit a preference for matter over antimatter, similar to its preference for left-handed particles and right-handed antiparticles.
  • Technical terms such as C and CP symmetry violations are introduced in relation to the weak interaction's properties.
  • Some participants express confusion regarding the responses to their points, indicating a lack of clarity in the discussion.

Areas of Agreement / Disagreement

Participants express differing views on the implications of neutrinos being Majorana particles and whether lepton number is conserved. There is no consensus on the nature of weak interactions regarding matter and antimatter preferences.

Contextual Notes

Some claims rely on theoretical interpretations that may not be universally accepted, and there are unresolved questions about the implications of weak interaction properties.

Helena Wells
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If neutrinos are majorana particles does this mean that lepton number is not conserved in particle reactions? And I only noticed neutrinos are only produced when the decay of a particle to some other particles is carried by the W bosons ( weak interaction ).

Is it possible the weak interaction 'prefers' matter over antimatter somehow just like it prefers left handed particles and right handed antiparticles?
 
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If. Conflicting unverifiable theories. I prefer theories that fit empirical results. Some studies postulated neutrinos oscillated between particle and antiparticle which would make it a Dirac Fermion not Majorana Fermion. I don't see why Lepton number changes since it is still a Fermion
"God did it" is just as verifiable as any theory out there explaining the preponderance of matter. As far as tested, there is no difference in the magnitude of matter or anti-matter properties that would advantage one over the other.
 
Helena Wells said:
If neutrinos are majorana particles does this mean that lepton number is not conserved in particle reactions?

Sure, neutrinoless double beta decay would be the simplest example that comes to mind and is something actively looked for in experiments.

Helena Wells said:
Is it possible the weak interaction 'prefers' matter over antimatter somehow just like it prefers left handed particles and right handed antiparticles?

To put it in more technical terms, the weak interaction violates C and CP symmetry, yes.
 
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Dr.AbeNikIanEdL said:
Sure, neutrinoless double beta decay would be the simplest example that comes to mind and is something actively looked for in experiments.
To put it in more technical terms, the weak interaction violates C and CP symmetry, yes.
I am not sure if weak interaction prefers matter over antimatter but I am sure it prefers left handed particles over right handed particles and right handed antiparticles over left handed antiparticles.
 
I don't understand how that is a response to what I wrote...
 

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