I Emission of neutrinos and antineutrinos

[jishnu]

My question is what is the actual purpose for the emission of neutrinos and antineutrinos during the beta + and beta - decay of an atom respectively?

 

[Orodruin]

What do you mean by "actual purpose"? Nature does not need a deeper purpose to work the way it does.

 

[PeterDonis]

Moderator's note: Thread level changed to "I" based on the OP's apparent level of background knowledge.

 

[jishnu]

What do you mean by "actual purpose"? Nature does not need a deeper purpose to work the way it does.

I meant why is it being emitted ie, whether simply for energy conservation or is there something more than that behind their emission!

 

[jishnu]

Moderator's note: Thread level changed to "I" based on the OP's apparent level of background knowledge.

Sorry for that, because its my mistake that I don't know on what basis this thread status is given. Where can I get more informations about this, I need to know because I am new to PF

 

[mfb]

The process without a neutrino violates the conservation of lepton number.

It would be possible in terms of energy, but it would give nucleus and electron a fixed energy, which does not agree with observations.

Sorry for that, because its my mistake that I don't know on what basis this thread status is given.

The level of answers/discussion you would like to have. The tooltips show the meaning of the symbols.

 

[jishnu]

The process without a neutrino violates the conservation of lepton number.

It would be possible in terms of energy, but it would give nucleus and electron a fixed energy, which does not agree with observations.The level of answers/discussion you would like to have. The tooltips show the meaning of the symbols.

What are these leptons actually, could you please provide me sources that provide more informations about them, one more question regarding the emission of beta particles remains, is there any connection between their emission and the conservation of angular momentum of the system before and after the emission takes place.

 

[Orodruin]

The process without a neutrino violates the conservation of lepton number.

Historically, the more important violated quantum number was angular momentum. Pauli proposed the neutrino to address two problems:

• The observed apparent violation of angular momentum in beta decays.
• The observed energy spectrum of beta decays was not consistent with a two-body decay, i.e., your second point:

It would be possible in terms of energy, but it would give nucleus and electron a fixed energy, which does not agree with observations.

At the time, lepton number was not considered an issue.

What are these leptons actually, could you please provide me sources that provide more informations about them, one more question regarding the emission of beta particles remains, is there any connection between their emission and the conservation of angular momentum of the system before and after the emission takes place.

Leptons are fermions that do not interact via the strong interactions. In other words, electrons, muons, taus, and neutrinos.

 

[jishnu]

Historically, the more important violated quantum number was angular momentum. Pauli proposed the neutrino to address two problems:

• The observed apparent violation of angular momentum in beta decays.
• The observed energy spectrum of beta decays was not consistent with a two-body decay, i.e., your second point:

At the time, lepton number was not considered an issue.Leptons are fermions that do not interact via the strong interactions. In other words, electrons, muons, taus, and neutrinos.

Thank you for the provided explanation.
So, can I conclude that the emitted neutrinos and antineutrinos are responsible for conservation of
1. angular momentum
2. lepton numbers
And what are they(neutrinos & antineutrinos) actually made up of, are they mere energy packets..!

 

[Orodruin]

So, can I conclude that the emitted neutrinos and antineutrinos are responsible for conservation of
1. angular momentum
2. lepton numbers

I would not put it like this. There is no assignment of ”responsibility”. However, without the neutrinos, those things would be violated (just as they would be if there was no electron/positron).

And what are they(neutrinos & antineutrinos) actually made up of, are they mere energy packets..!

Elementary particles are not ”made up of” anything. Energy is not a substance that things can be made up of, it is a physical property of things.

 

[jishnu]

Thank you all... [emoji1]

 

[PeterDonis]

I don't know on what basis this thread status is given. Where can I get more informations about this

See here:

https://www.physicsforums.com/help/threadprefixes/

 

[jishnu]

See here:

https://www.physicsforums.com/help/threadprefixes/

[emoji4]