How Does the Existence of Sterile Neutrinos Impact Big Bang Nucleosynthesis?

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Discussion Overview

The discussion centers on the impact of sterile neutrinos on Big Bang nucleosynthesis, exploring how their existence might differ from the effects of active neutrino oscillation. The inquiry is made on behalf of a friend, suggesting a conceptual exploration of theoretical implications.

Discussion Character

  • Exploratory, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant questions the existence of sterile neutrinos, referencing recent MiniBoone results that may challenge their validity.
  • Another participant distinguishes between light sterile neutrinos and those potentially induced by Grand Unified Theories (GUT), suggesting that the implications of an extra neutrino species could vary significantly based on the model.
  • Concerns are raised about the lack of verified sterile neutrinos, leading to a claim that the original premise regarding their existence may be false.

Areas of Agreement / Disagreement

Participants express differing views on the existence and implications of sterile neutrinos, indicating that multiple competing perspectives remain unresolved.

Contextual Notes

The discussion highlights uncertainties regarding the verification of sterile neutrinos and the dependence on specific theoretical models, such as those involving GUTs.

S1nG
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Because of the existence of sterile neutrino, how and why it gives effect on the big bang nucleosynthesis more than active-active neutrino oscillation. Its a question on behalf of my friend. thanks for any help
 
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Er.. what "sterile neutrino"? Did you (or your friend) missed the recent MiniBoone result?

http://physicsworld.com/cws/article/news/27569

Zz.
 
Thats regarding the hypothesis for a light sterile neutrino. Nothing MiniBoone says effects the possibility of say a GUT induced one.

As for the OPs question. Could you be a little more specific. Obviously an extra neutrino species will change things, sometimes dramatically depending on the model (eg it can cause Leptogenesis)
 
Haelfix said:
Thats regarding the hypothesis for a light sterile neutrino. Nothing MiniBoone says effects the possibility of say a GUT induced one.

But then we are left with no other "verified" sterile neutrinos, which means the original premise of the "existence" of sterile neutrinos in the OP is false.

Zz.
 

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