Can leptogenesis explain why there's something instead of nothing?
Why Physics Stack Exchange recommends it
Physics Stack Exchange users, especially commenter mmesser314, link it as an accessible overview when asked why matter outnumbers antimatter or why there is something rather than nothing.
Recommended by 1 people across 3 different months, 2020 to 2024.
What it is
A 14-minute explainer from Fermilab in which physicist Don Lincoln lays out the theory of leptogenesis as a possible reason the universe contains matter rather than nothing. It covers the assumptions behind the idea and how the DUNE neutrino experiment could test it.
What people said
Recommends mmesser314 · 2021-01 · Physics Stack Exchange · on “Big bang should have made up an equal amounts of both matter and anti matter, then why don't we see such?”
From Dr. Don Lincoln at FermiLab: Can leptogenesis explain why there's something instead of nothing? [this video]
Recommends mmesser314 · 2021-01 · Physics Stack Exchange · on “The neutrinoless double beta decay can only occur if $\dots$”
This video by Dr. Don Lincoln of FermiLab explains some of what you want. Can leptogenesis explain why there's something instead of nothing? [this video]
Recommends mmesser314 · 2022-06 · Physics Stack Exchange · on “How is there energy and charge in the universe?”
For charges, here is a video by Don Lincoln of Fermilab - Can leptogenesis explain why there's something instead of nothing? [this video]
Recommends mmesser314 · 2023-02 · Physics Stack Exchange · on “How would the universe look like without matter?”
This video From Dr. Don Lincoln at FermiLab may help: Can leptogenesis explain why there's something instead of nothing? [this video]
Cites MathTrain · 2020-04 · Physics Stack Exchange · on “Assumptions for Leptogenesis”
In a video by Fermilab's YouTube channel "Can leptogenesis explain why there is something instead of nothing?", host Dr. Lincoln states four assumptions for the theory of leptogenesis. One of them is that neutrinos are Majorana particles - that is, they are their own antiparticles. However, he also states that the point of the DUNE experiment is to test for differences in the behavior of neutrinos and antineutrinos, and he says detecting a difference would give evidence for leptogenesis. How can these both be simultaneously true? If antineutrinos and neutrinos are the same, how could there be a difference in their morphing behaviors, as Dr. Lincoln says at around 13:00 in the video? What am
Cites NonPartisanObservor · 2022-08 · Physics Stack Exchange · on “Did electric charge not exist in the early universe?”
I ask this question based on something Don Lincoln said in a video about leptogenesis over at the Fermilab Youtube channel. Video for reference: [this video] Here is his exact quote: ... during a time in the universe very shortly after the Big Bang - far less than a trillionth of a second after the cosmos began ... the universe was extremely hot - much, much, hotter than we can achieve in any conceivable particle accelerator. ...there is a ghostly field in the universe called the Higgs field that gives mass to subatomic particles. The Higgs field depends on the temperature, which is to say, the energy, of the universe. Above that temperature, the Higgs field is zero, meaning that all of the famil
Cites mmesser314 · 2023-01 · Physics Stack Exchange · on “Can we just use the uncertainty principle to explain something from nothing?”
Why there is something rather than nothing is a serious question that has not been answered yet. There are ideas. Here is a high level explanation of one of them. Can leptogenesis explain why there's something instead of nothing? [this video] . Note that it takes considerably more than the uncertainty principle.
Cites mmesser314 · 2024-11 · Physics Stack Exchange · on “Why is there more matter than antimatter in the universe?”
Here is one contender for the reason - Can leptogenesis explain why there's something instead of nothing? [this video]