Please register and log-in to create and edit pages

User Tools

    Please register and log-in to create and edit pages

Site Tools


Main Menu

Main menu
Click categories to expand


A-Z listingplugin-autotooltip__plain plugin-autotooltip_bigA-Z listing

This is an alphabetical index of all content pages.


Other categories

Utilities

Contacts
Register

Also see

Importance Ratings
News
Legal
Donate/Sponsor


Wikenigma supports:


Feeds etc
rss / xml feed
sitemap file
A-Z listing (archived)


Auto-Translate Site

Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown

Neutrino mass

New research has found that the neutrino has a non-zero mass - but this requires a modification to the Standard Model of particle physics. The non-zero mass also means that neutrinos cannot travel at light-speed as photons do.

“Although neutrinos were long believed to be massless, it is now known that there are three discrete neutrino masses with different tiny values, but they don't correspond uniquely to the three flavors. A neutrino created with a specific flavor is in an associated specific quantum superposition of all three mass states”

Additionally, to acquire mass, all fermions (including neutrinos) of both 'handedness' must interact with the Higgs boson.

“In the Standard Model of particle physics, fermions only have mass because of interactions with the Higgs field. These interactions involve both 'left-handed' and 'right-handed' versions of the fermion. However, only left-handed neutrinos have been observed so far.”
Source :Wikipedia

Further, the mass that neutrinos do have has not yet been measured :

“It might seem absurd that physicists don't know how much neutrinos weigh, given that the universe contains more of them than any other type of matter particle. However, it's impossible to capture neutrinos, so there's no simple way to measure their mass.”
Source: Science, Vol. 356, Issue 6345, pp. 1322-1326, 2017

The mass which they have must (according to the current 'Standard Model') be acquired via the Higgs boson - but there are theoretical conflicts regarding neutrinos :

“The Higgs boson is responsible for giving mass to a certain class of particles that feature in the theory of the so-called electroweak interaction: a unified description of two of the four fundamental forces, electromagnetism and the nuclear weak force. Because the weak force underlies the beta decay process in which neutrinos are formed, neutrinos are implicated in this “Higgs mechanism.” In short, the non-zero mass of the three types of neutrino and the oscillations that cause switches between them can’t be fully squared with the Higgs mechanism, and seem to demand some kind of physics beyond the Standard Model.”

Source

Also see Radioactive decay neutrino anomalyplugin-autotooltip__plain plugin-autotooltip_bigRadioactive decay neutrino anomaly

Around yr2000, researchers at Purdue University, US, noticed that some radioactive sources - which should decay completely randomly - sometimes show peaks and troughs (i.e. cyclic variations) in the averaged radiation they produce ove…
and Anti-Neutrinosplugin-autotooltip__plain plugin-autotooltip_bigAnti-Neutrinos

"The electron neutrino has a corresponding antiparticle, the electron antineutrino (νe), which differs only in that some of its properties have equal magnitude but opposite sign. One open question of particle physics is whether or not neutrinos and anti…

Importance Rating


    Share this page :

Dear reader : Do you have any suggestions for the site's content?

Ideas for new topics, and suggested additions / corrections for old ones, are always welcome.

If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !


Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.

( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)

Automatic Translation

You are currently viewing an auto-translated version of Wikenigma

Please be aware that no automatic translation engines are 100% accurate, and so the auto-translated content will very probably feature errors and omissions.

Nevertheless, Wikenigma hopes that the translated content will help to attract a wider global audience.

Show another (random) page

DOKUWIKI IMPLEMENTATION DESIGN BY UNIV.ORG.UK OCTOBER 2021