# Questions about neutrinos

**URL:** <https://boards.straightdope.com/t/questions-about-neutrinos/771442>\
**Category:** Factual Questions\
**Created:** [November 11, 2016, 2:07am UTC](https://boards.straightdope.com/t/questions-about-neutrinos/771442 "2016-11-11T02:07:26Z")\
**Posts on this page:** 4\
**Page:** 2

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**Author:** ![ftg](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/ftg/32/2801_2.png) [@ftg](https://boards.straightdope.com/u/ftg)\
**Post date:** [November 12, 2016, 1:11pm UTC](https://boards.straightdope.com/t/questions-about-neutrinos/771442/21 "2016-11-12T13:11:48Z")

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Thanks, **Pasta**.

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**Author:** ![MikeS](https://avatars.discourse-cdn.com/v4/letter/m/919ad9/32.png) [@MikeS](https://boards.straightdope.com/u/MikeS)\
**Post date:** [November 12, 2016, 1:22pm UTC](https://boards.straightdope.com/t/questions-about-neutrinos/771442/22 "2016-11-12T13:22:47Z")

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> [@Pasta](#):
>
> This interaction type is detected routinely. This so-called “neutral current” interaction was central to definitively establishing neutrino oscillations using solar neutrinos.

You know, I knew about neutral-current scattering once, long ago, but apparently I had forgotten about it. Thanks for the correction.

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**Author:** ![Chronos](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chronos/32/134_2.png) [@Chronos](https://boards.straightdope.com/u/Chronos)\
**Post date:** [November 12, 2016, 2:25pm UTC](https://boards.straightdope.com/t/questions-about-neutrinos/771442/23 "2016-11-12T14:25:42Z")

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> [@](#):
>
> Quoth **Pasta** :
> 
> (The next most competitive limit actually comes from the difference in travel times for neutrinos versus photons from supernova 1987a.)

Which is unfortunately not an experiment which can easily be repeated with better instruments. Though if we had data from just one more supernova, even data of only the same quality, it’d do a lot to improve the results.

And measurements of the expected value of the electron neutrino mass are very closely related to those constraining the sum of all three masses, given the known mass splittings (which are much smaller than the upper bounds).

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**Author:** ![Riemann](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/riemann/32/3133_2.png) [@Riemann](https://boards.straightdope.com/u/Riemann)\
**Post date:** [November 13, 2016, 2:12am UTC](https://boards.straightdope.com/t/questions-about-neutrinos/771442/24 "2016-11-13T02:12:27Z")

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This hit my feed today, there’s a new supernova alarm system at Super-Kamiokande. Tweets and updates its Facebook status when supernova neutrinos are coming!

> **[Detector With Real-time Alert Capability Waits Patiently For Supernova Neutrinos](https://www.universetoday.com/131907/detector-real-time-alert-capability-waits-patiently-supernova-neutrinos/)**
>
> Researchers at the Super-Kamiokande Observatory hope to be able to learn more about the elusive neutrino particle, thanks to a new computer system that can monitor detections in real-time.

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