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Topic: Neutrino oscillation

Related Topics

Electron neutrino

Neutrino

Tau antineutrino

Cosmology

1998

Muon neutrino

Antineutrino

	Neutrino Oscillations (Site not responding. Last check: 2007-09-12)
		Neutrino oscillation is not fl magic - there are very specific predictions for the behavior of our data if neutrinos oscillate, and we have uniformly found the data in good agreement with these predictions.
		Although estimation of the neutrino energy giving rise to a given interaction is necessary approximate, there are no inconsistencies in the behavior of the different data sets, and all the atomospheric data agree well with the oscillation hypothesis regardless of energy.
		The reason neutrino oscillation is relevant to the question of neutrino mass is that massless neutrinos cannot oscillate.
	www.ps.uci.edu /~superk/nuosc.html (515 words)

	Neutrino oscillation - Wikipedia, the free encyclopedia
		Neutrino oscillation is of theoretical and experimental interest as observation of the phenomenon implies that the neutrino has a non-zero mass, which is not part of the original Standard Model of particle physics.
		Solar and atmospheric neutrino experiments have shown that neutrino oscillations are due to a mismatch between the flavor and mass eigenstates of neutrinos.
		From atmospheric and solar neutrino oscillation experiments, it is known that two mixing angles of the MNS matrix are large and the third is smaller.
	en.wikipedia.org /wiki/Neutrino_oscillation (2520 words)

	Information For the Public
		The continuing study of neutrino physics suggests that a neutrino of one family might sometimes change into a neutrino of a different family, by a mechanism known as neutrino oscillation.
		Neutrinos must have mass, and the mass cannot be identical for all three neutrino flavors.
		To determine whether neutrinos oscillate from one flavor to another, and, hence, have mass, a collaboration of 200 scientists from 26 institutions worldwide are planning the MINOS experiment.
	www-numi.fnal.gov /public/oscillations.html (888 words)

	Neutrino Oscillations
		As the neutrino continues to travel, the proportion of each vary with distance, so it is said that neutrinos oscillate from one state to another.
		Neutrinos produced from the decay of pions and kaons from cosmic-ray interactions in the upper levels of the atmosphere can be measured in underground experiments.
		It is difficult to reconcile this neutrino deficit with the current understanding of the sun (standard solar model) which is extremely successful at determining other parameters (in particular, it is very successful at measuring the vibrational frequencies of solar oscillations, or sun-quakes, that can also be measured).
	www.physics.usyd.edu.au /hienergy/oscillations.html (1829 words)

	Neutrino Oscillations (Site not responding. Last check: 2007-09-12)
		A rigorous mathematical explanation of neutrino oscillation is beyond the scope of this introduction, but the outlines can be sketched out for the simplified case where there are only two neutrinos involved in the process.
		But if a neutrino with a definite mass is a mixture of both electron and muon neutrinos (this pre-condition for oscillation is termed "mixing"), what started as a pure electron neutrino with a mixture of masses has become a neutrino with a pure mass and a mixture of electron neutrino and muon neutrino properties.
		If the neutrino interacts a point where it is not in a definite state of being either an electron neutrino or a muon neutrino, which one it behaves like at that moment is anybody's guess.
	www.ps.uci.edu /~superk/oscillation.html (1153 words)

	Theory of Neutrino Oscillations
		It is shown that the standard phase of neutrino oscillations is correct, refuting the claims of a factor of two correction presented in [7-32,7-27,7-26].
		It is shown that for stationary beams the decoherence of neutrino oscillations due to wave packet separation and that due to incoherent average over the energy spectrum are indistinguishable, as already noted in [5-60].
		An interpretation of this paper as a proof that neutrinos are not described by wave packets stems from a confusion between microscopic and macroscopic stationarity [5-37,5-32,2-3,5-22].
	www.nu.to.infn.it /Neutrino_Oscillations (3105 words)

	Neutrino Mass
		From the impact of cosmic ray on a nucleus in the atmosphere it is expected that the ratio of muon-neutrinos to electron-neutrinos is 2 to 1.
		The neutrino states on the left of the equation are the flavor states produced in weak interaction, while the states on the right (with the numerical subscripts) are called the mass states corresponding to free neutrino with different mass.
		Neutrino mixing is then considered as a correction within SM providing a window to the new discovery before formulating in detail the deeper theory.
	universe-review.ca /R15-13-neutrino.htm (1288 words)

	Neutrinos
		The electron neutrino (a lepton) was first postulated in 1930 by Fermi to explain why the electrons in beta decay were not emitted with the full reaction energy of the nuclear transition.
		Modern neutrino detectors at IMB in Ohio and Kamiokande in Japan detected neutrinos from Supernova 1987A.
		New experimental evidence from the Super-Kamiokande neutrino detector in Japan represents the strongest evidence to date that the mass of the neutrino is non-zero.
	hyperphysics.phy-astr.gsu.edu /hbase/particles/neutrino.html (1421 words)

	International team of scientists successfully observes elusive neutrino oscillation
		Atmospheric neutrinos are produced by high-energy collisions of cosmic rays with the Earth's upper atmosphere and come in two types, or "flavors," called electron-type and muon-type.
		In the theory of neutrino mixing, the probability that a neutrino of one flavor changes into another is a sinusoidal function of the ratio of distance traveled (L) divided by the neutrino energy (E).
		The number of neutrino events was then studied as a function of the ratio L/E. The data showed a prominent dip at a value of L/E, consistent with the theory of neutrino mixing.
	www.eurekalert.org /pub_releases/2004-07/uoc--ito070704.php (829 words)

	THE DISCOVERY OF NEUTRINO OSCILLATIONS
		Neutrinos are not currently the favorite of cosmologists as solutions to "the dark matter problem" (strong astronomical evidence that the visible stars in galaxies only account for a small fraction fo the total mass of the galaxy), since in their calculations neutrinos do not cluster enough.
		Neutrino oscillations are a peculiar quantum mechanical effect, for which it is hard to find a good macroscopic analogy, as it has to do with the particle-wave duality of fundamental matter.
		Neutrino oscillations were first hypothesized by Bruno Pontecorvo (most famous to the public for having defected from Canada to the Soviet Union) in 1957, and independently by Z. Maki, M. Nakagawa and S. Sakata from Nagoya, Japan in 1962.
	www.phys.hawaii.edu /~jgl/nuosc_story.html (7077 words)

	Neutrino Oscillation (Site not responding. Last check: 2007-09-12)
		Finally, it depends on the ratio of the neutrino energy, E, to the neutrino travel distance, L. High energy neutrinos that travel a short distance (small L/E) are unlikely to change flavors compared to low energy neutrinos that travel a long distance (large L/E).
		The probability for a muon-flavored neutrino to be observed as either a muon-neutrino or some other type of neutrino ("x") is plotted as a function of the neutrino flight distance in kilometers.
		Neutrino oscillations may explain why atmospheric neutrino measurements don't see the expected number of neutrinos and may also explain why observations of solar neutrinos also see fewer neutrinos than expected.
	hep.bu.edu /~superk/osc.html (345 words)

	More evidence for neutrino oscillation (December 2002) - News - PhysicsWeb
		Neutrinos are one of the fundamental particles of matter.
		The KamLAND researchers are now certain that the “solar neutrino problem” -- the fact that fewer neutrinos are observed from the Sun than predicted -- is indeed due to neutrino oscillation and not because of some interaction the neutrinos may have had with the Sun’s magnetic field, as some researchers suggested.
		The mixing angle is important as neutrinos with a large mixing angle are much less affected by matter than those with a small mixing angle.
	physicsweb.org /article/news/6/12/8 (494 words)

	Neutrino - Wikipedia, the free encyclopedia
		A practical method for investigating neutrino masses (that is, flavour oscillation) was first suggested by Bruno Pontecorvo in 1957 using an analogy with the neutral kaon system; over the subsequent 10 years he developed the mathematical formalism and the modern formulation of vacuum oscillations.
		The strongest upper limit on the masses of neutrinos comes from cosmology: the Big Bang model predicts that there is a fixed ratio between the number of neutrinos and the number of photons in the cosmic microwave background.
		Atmospheric neutrinos result from the interaction of cosmic rays with atomic nuclei in the Earth's atmosphere, creating showers of particles, many of which are unstable and produce neutrinos when they decay.
	en.wikipedia.org /wiki/Neutrino (4378 words)

	symmetry - May 2005 - The Elusive Neutrino
		Neutrinos are capable of traversing the entire Earth in the blink of an eye.
		The disappearance of neutrinos seems to be tied to a rather mind-boggling behavior of these elusive particles: neutrino oscillations.
		The idea of neutrino transformation gained significant support in 1998, when the Super-Kamiokande collaboration improved on earlier experiments and announced that some muon neutrinos produced in the Earth's atmosphere also "disappeared" before traversing the Super-Kamiokande detector, 2000 feet underground in an old zinc mine in Japan.
	www.symmetrymag.org /cms/?pid=1000112 (2646 words)

	Solar Neutrino Viewgraphs
		We show that solar plus reactor neutrino experiments set an upper limit of 7.3% to the fraction of energy that the Sun produces via the CNO fusion cycle, which is an order of magnitude improvement upon the previous limit.
		New experiments are required to detect CNO neutrinos corresponding to the 1.5% of the solar luminosity that the standard solar model predicts is generated by the CNO cycle.
		This viewgraph shows neutrino oscillation experiments, including solar neutrino experiments, in the plane L/E versus Event Rate, where L is the source-detector separation and E is the neutrino energy.
	www.sns.ias.edu /~jnb/SNviewgraphs/snviewgraphs.html (2096 words)

	Neutrino oscillation
		"Neutrino oscillation" is based on what is known as "the wave-particle duality", that is, according to quantum mechanics laws, a particle, when it is propagated, behaves like a wave.
		For a given momentum[4] the energy associated to mass eigenstates is all the more higher as is their "rest" mass; indeed, according to the mass-energy equation, a particle "rest" mass contributes to its total energy, together with kinetic energy (associated to the momentum).
		Thus, if neutrinos have a mass, and each neutrino type a different one, their corresponding rates (so called phases) are also different.
	choruswww.cern.ch /Public/textes/english/node4.html (1097 words)

	K2K Physics
		Neutrino mass and lepton number violation are a key to understand the universe.
		Once the existence of neutrino oscillation is established, this means that the neutrino mass is finite and lepton number is not conserved.
		Despite no definite theoretical or experimental evidence of the neutrino mass and mixing angle exists, there are a few indications from cosmology which imply finite neutrino mass and mixing.
	superk.physics.sunysb.edu /k2k/physics_new.html (635 words)

	Standard Model Upended With Discovery Of Neutrino Oscillation, Mass
		In their report, the researchers show that the size of the measured difference depends on the distance traveled in a way that is consistent with the theory of neutrino oscillation.
		According to the neutrino mixing theory of the Standard Model, the probability that a neutrino of one flavor changes to another can be determined by dividing the distance a neutrino travels (L) by its energy (E).
		Thus, the 1998 discovery of neutrino oscillation was also the first evidence that neutrinos have mass.
	www.spacedaily.com /news/cosmology-04u.html (715 words)

	Neutrino Oscillation Workshop 2000 (Site not responding. Last check: 2007-09-12)
		Neutrino oscillation physics has truly come of age in the last few years.
		It is now data driven (analogous to cosmology and much of high energy physics in general).
		An example of the latter includes the more realistic analysis of neutrino oscillations in the framework of 3 or more mass eigenstates.
	www.physics.upenn.edu /~pgl/neutrino/now2000 (89 words)

	The Ultimate Neutrino Page
		The above decay scenario leads to muon neutrinos with energy spectrum of some tens of MeV, and electron neutrinos and muon antineutrinos with smaller mean energy.
		The appearance of high energy electron neutrinos is therefore a signal of neutrino oscillation.
		As the neutrino beam does not contain any significant amount of tau neutrinos, an appearance of a charged tau lepton in a nearby detector is a signal of neutrino oscillation.
	cupp.oulu.fi /neutrino/nd-osc.html (544 words)

	Neutrino Oscillation Lab
		For the moment, it assumes that the primary neutrino beam is the
		If masses of the mass eigenstates are different, the physical neutrinos will, in general, oscillate with the frequencies related to the differences of squares of masses, dm
		Oscillation frequency of mass eigenstates depends on the beam energy, therefore the neutrino oscillations depend on the energy too.
	home.fnal.gov /~para/Superposition1.html (446 words)

	Neutrino - Nomad Jukebox Manager
		Neutrino, formally GnomeDAP, is a GNOME based application for managing your Creative Nomad / D.A.P Jukeboxes.
		Support for talking to the hardware is provided by utilising libnjb, which as Creative will not give out the relevant information, is a reverse engineered user space driver for Linux and *BSD.
		The name Neutrino was decided upon after a search for the word Nomad on Google.
	neutrino.sourceforge.net (170 words)

	Neutrino Oscillation Search
		During the last 15 years many experiments have been conducted to search for neutrino oscillation at distances ranging from 8m to 70m.
		The challenge is to compensate the neutrino flux reduction (10
		To get a neutrino event rate of 10 events per day the target size is of the order of 1 Kton.
	www.nupecc.org /report97/report97_neutrino/node20.html (481 words)

	The Neutrino Oscillation Industry (Site not responding. Last check: 2007-09-12)
		APS Multidivisional Neutrino Study for 2004, and the final reports posted 11 November 2004
		UNO proposal for nucleon decay and neutrino detection.
		President Clinton's remarks on the Neutrino Mass at the 1998 MIT commencement ceremony.
	hepunx.rl.ac.uk /neutrino-industry (236 words)

	E1-C: Retro/Exotic Neutrino Interactions?
		Consider the scientific potential of neutrino beams from muon storage rings and pion superbeams.
		We present a quantitative appraisal of the physics potential for neutrino experiments at the front-end of a muon storage ring.
		We estimate the extraction of individual quark and antiquark densities from polarized and unpolarized deep-inelastic scattering.
	www.physics.smu.edu /~olness/booster (699 words)

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