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Neutrino Masses       Article     History   Tree Map
  Encyclopedia of Keywords > Information > Science > Physics > Standard Model > Neutrino Masses   Michael Charnine

Keywords and Sections
NON-ZERO NEUTRINO MASSES
LIGHT
QUESTIONS
SEESAW MECHANISM
MIXING
SUM
MODEL
UNIFICATION
THEORIES
MEASUREMENTS
RIGHT ORDER
LEPTON NUMBER
STANDARD MODEL
NEUTRINO MASSES
Review of Short Phrases and Links

    This Review contains major "Neutrino Masses"- related terms, short phrases and links grouped together in the form of Encyclopedia article.

Definitions

  1. Because neutrino masses are less than a few electron-Volts, neutrinos can only account for a small fraction of the dark matter that permeates the Universe. (Web site)

Non-Zero Neutrino Masses

  1. Under the Standard Model, a massless neutrino cannot oscillate, so this observation implied the existence of non-zero neutrino masses.

Light

  1. This implied the existence of non-zero neutrino masses since massless particles travel at the speed of light and so do not experience the passage of time.

Questions

  1. Answering these questions requires precision measurements of the neutrino masses and mixings.

Seesaw Mechanism

  1. The Majoron is predicted to understand neutrino masses by the seesaw mechanism.

Mixing

  1. We consider the seesaw mechanism of neutrino mass generation in the light of our present knowledge of the neutrino masses and mixing.

Sum

  1. These indicate that the sum of the neutrino masses must be less than 0.3 electronvolt (Goobar, 2006).

Model

  1. The model contains 19 free parameters, such as particle masses, which must be determined experimentally (plus another 10 for neutrino masses). (Web site)

Unification

  1. In fact, the size of the neutrino masses is consistent with expectations from unified theories that require the new particles for the unification itself.

Theories

  1. The mechanism is commonly seen in grand unification theory, and in particular in theories of neutrino masses and neutrino oscillation.

Measurements

  1. So far, the question of neutrino masses cannot be decided based on measurements of the neutrino speed.
  2. By combining this with information from previous measurements, it is possible to set an upper limit on the sum of the known neutrino masses.

Right Order

  1. This is natural in certain grand unified theories, and if new physics appears at about 10 16 GeV, the neutrino masses are of the right order of magnitude.

Lepton Number

  1. There, the exchange of supersymmetric particles such as squarks and sleptons can break the lepton number and lead to neutrino masses. (Web site)

Standard Model

  1. CP violation, neutrino masses, fermion nonconservation, and possible extensions of the Standard Model.
  2. The standard model of particle physics, CP violation, the CKM matrix and the strong CP problem Neutrino masses, CPT invariance and tests of CPT violation. (Web site)

Neutrino Masses

  1. One important non-collider effort is the determination of the neutrino masses since these masses may arise from neutrinos mixing with very heavy particles. (Web site)
  2. Neutrinos have opened a surprising new window on the physics of lepton generations, since neutrino masses are not necessary in the Standard Model.

Categories

  1. Information > Science > Physics > Standard Model
  2. Cp Violation
  3. Neutrinos
  4. Heavy Particles
  5. Right Order
  6. Books about "Neutrino Masses" in Amazon.com

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  Short phrases about "Neutrino Masses"
  Originally created: April 04, 2011.
  Links checked: July 05, 2013.
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