Timeline for Solar neutrino deficit, 1/3 or 1/2?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 2, 2023 at 18:28 | comment | added | Alfred | @J.G. Yes, I did check that wiki page just after posting my remark on knzhou remark. Neutrinos emerging from the sun in the second mass eigenstate because of interaction with matter. If knzhou makes it an answer, I'll accept it. | |
| Nov 2, 2023 at 18:23 | comment | added | J.G. | It looks like this is what @knzhou described. | |
| Nov 2, 2023 at 18:07 | comment | added | Alfred | @knzhou Your second remark goes in my direction. Indeed, what comes from the PMNS matrix' elements is 1/2, not 1/3, that would be a naive equipartition. As far as the first one, I'll check the "MSW" effect. As you describe it, it would indeed make sense. Why don't you make it an answer ? | |
| Nov 2, 2023 at 17:53 | comment | added | knzhou | This $1/3$ has absolutely nothing to do with the fact that there are $3$ flavors; instead it depends on detail on the PMNS matrix's elements. So yes, the way it's described in popsci is a big oversimplification. | |
| Nov 2, 2023 at 17:52 | comment | added | knzhou | The right keyword to look up is "MSW effect". The Sun's electron density affects the neutrinos' properties as they pass through it. By the time they exit the Sun, they're actually in the second mass eigenstate which has a squared projection of $1/3$ on the electron flavor eigenstate. | |
| Nov 2, 2023 at 17:46 | history | asked | Alfred | CC BY-SA 4.0 |