What are singular and double seesaw?

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SUMMARY

The discussion focuses on the concepts of double seesaw and singular seesaw within the context of neutrino physics. The user expresses familiarity with type-I and type-II seesaw mechanisms but seeks clarification on these two specific terms. References to academic papers are provided, including a detailed mathematical explanation of the double seesaw mechanism and an older paper discussing the singular seesaw. These resources are essential for understanding the distinctions and implications of these seesaw types in neutrino mass generation.

PREREQUISITES
  • Understanding of neutrino physics concepts
  • Familiarity with seesaw mechanisms, specifically type-I and type-II
  • Basic knowledge of particle physics mathematics
  • Access to academic research papers in physics
NEXT STEPS
  • Read the paper on double seesaw mechanisms: PhysRevD.70.053012
  • Explore the older paper on singular seesaw: tjallen/neutrino.pdf
  • Study the mathematical framework of seesaw mechanisms in neutrino mass generation
  • Investigate the implications of seesaw mechanisms on neutrino oscillation experiments
USEFUL FOR

Physicists, students of particle physics, and researchers interested in neutrino mass mechanisms and their theoretical implications.

Riotto
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I have just started reading about neutrino physics and recently came across two terms called double seesaw and singular seesaw. Although I’m familiar with other seesaw mechanisms (such as type-I and II) for explaining smallness of neutrino mass. I’m completely at dark about double and singular seesaw. If someone can help me understand those it would be great.
 
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I can't really help here but I did find this paper describing some of the math behind the principles which might help you gain some understanding of the differences.

https://journals.aps.org/prd/pdf/10.1103/PhysRevD.70.053012

and this older paper on the singular variety:

http://people.hws.edu/tjallen/PDF/tjallen/neutrino.pdf
 
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