Production of massive neutrinos in electron - positron annihilation.

In summary, the conversation discusses various theories and experiments related to neutrinos and the expansion of the Standard Model. The first theory mentioned is Grand Unified Theories, which aim to simplify the gauge group of the Standard Model. Another theory is the possibility of electron-positron annihilation resulting in the production of two 511 keV gamma rays. The conversation also touches on the conversion of rest mass to relativistic mass and the role of the Higgs in giving mass to neutrinos according to the Standard Model.
  • #1
Maz
2
0
I bumbed in such event in on book written in middle 80's.

Does anyone know anything of such phenomena? Has that theory been killed or is there any info available of it anywhere??

Oh joy... I'm writing an essay of neutrinos, and I am really lost.. :|

Oh, and another question... Any other theories around, that try to expand SM, but supersymmetry and superstrings??
 
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  • #2
A russian team though there had found a neutrino about 17 eV mass. Not idea what kind of experiment it was.
 
  • #3
Maz said:
Oh, and another question... Any other theories around, that try to expand SM, but supersymmetry and superstrings??
The first ones that come to mind are Grand Unified Theories. Essentially they try embedding the standard model gauge group, U(1) X SU(2) X SU(3), into a simpler gauge group like SU(5). A good introduction can be found at
http://www.geocities.com/jefferywinkler/beyondstandardmodel.html
 
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  • #4
Current theory and experiments indicate electron-positron annihilation results in the production of two 511 kev gamma rays and nothing else.
 
  • #5
mathman said:
Current theory and experiments indicate electron-positron annihilation results in the production of two 511 kev gamma rays and nothing else.


yep, yep

this is also a nice illustration of how restmass can be converted to relativistic mass and the other way around. Two fotons colliding (scattering) can form a positron-electron pair which have restmasses...
 
  • #6
Doesn't a neutrino acquire mass through the Higgs conform the Standard Model
 

Related to Production of massive neutrinos in electron - positron annihilation.

1. How are massive neutrinos produced in electron-positron annihilation?

In electron-positron annihilation, the collision of an electron and positron (antiparticle of electron) creates a massive virtual photon. This photon then decays into a pair of neutrinos, one with a positive charge and one with a negative charge. These neutrinos are known as electron neutrinos and antineutrinos, respectively.

2. Why is the production of massive neutrinos in electron-positron annihilation significant?

The production of massive neutrinos in electron-positron annihilation is significant because it provides evidence for the existence of neutrinos with non-zero mass. This is an important discovery in particle physics and has implications for our understanding of the Standard Model.

3. How do scientists detect the production of massive neutrinos in electron-positron annihilation?

Scientists detect the production of massive neutrinos in electron-positron annihilation by looking at the decay products of the virtual photon. Since the neutrinos have very small masses, they carry away very little energy and momentum, making them difficult to detect directly. Instead, scientists rely on indirect methods such as measuring the missing energy and momentum in the decay products.

4. Can massive neutrinos be produced in other types of particle collisions?

Yes, massive neutrinos can be produced in other types of particle collisions, such as proton-proton collisions in high energy particle accelerators. However, electron-positron annihilation is a particularly clean and well-understood process, making it a useful tool for studying the properties of neutrinos.

5. What are the implications of the production of massive neutrinos in electron-positron annihilation?

The production of massive neutrinos in electron-positron annihilation has several implications. It confirms the existence of neutrinos with non-zero mass, which challenges the Standard Model of particle physics. It also opens up new avenues for studying the properties of neutrinos, such as their masses and mixing angles, and may have implications for our understanding of the early universe and dark matter.

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