HiggsMass

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vr 30 mar 2012, 22:20

Het Dolle Eland: Prettig sfeertje bij CERN...: «linQ»
Onderzoeksresultaten zijn weer geheel rolstoelproof

Dit onderzoek zou alle natuurkunde van een nieuw kader voorzien,
Dit mag natuurlijjk nooit bekend worden, want dat zou revolutionaire gevolgen hebben voor de wereld energiebehoefte ...
:dodeca:
Fysicus neemt ontslag om mislukt neutrino-experiment
Laatste update: 30 maart 2012 14:48
http://www.nu.nl/algemeen/2776388/fysic ... iment.html


ROME- De Italiaanse natuurkundige Antonio Ereditato heeft vrijdag ontslag genomen.

Hij was de leider van een groep wetenschappers die vorig jaar wereldnieuws maakten met hun bewering dat minuscule deeltjes, zogeheten neutrino's, bij een experiment sneller waren gegaan dan het licht.

Deze maand bleek dat het onderzoek niet klopte. Ereditato diende zijn ontslag in kort voordat enkele medewerkers van zijn groep onderzoekers een voorstel in stemming wilden brengen om hem tot een vertrek te dwingen.

Opzien
De resultaten van het onderzoek baarden zo veel opzien, omdat zij de relativiteitstheorie van Albert Einstein weerspraken. Volgens die theorie kan niets sneller gaan dan het licht: ongeveer 300.000 kilometer per seconde.

''Ik hoop dat Opera (het team onderzoekers onder leiding van Ereditato) weer eensgezind zal worden en een nieuwe leiding zal vinden om zijn belangrijkste doelstelling na te streven: het waarnemen van de verschijning van een nieuw type neutrino's'', liet adjunct-directeur Antonio Masero van het Italiaanse Instituut voor Kernfysica, in zijn reactie op het ontslag weten.

Experiment
Hij zei dat later dit jaar een nieuw experiment wordt gehouden om de snelheid van neutrino's te meten. De Italiaanse wetenschappers meldden de razendsnelle neutrino's in september.

Ze waren vanuit Genève, waar het Europees Centrum voor Kernonderzoek (CERN) is gevestigd, door de grond naar een laboratorium 733 kilometer verderop in Grand Sasso in de Italiaanse Apennijnen geschoten. Opera maakt deel uit van CERN.
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za 08 sep 2012, 13:34

‘De LHC kan verborgen dimensies aantonen’
Interview met theoretisch natuurkundige Lisa Randall

Extra dimensies lijken misschien uit het sciencefiction genre te komen, maar volgens de beroemde natuurkundige Lisa Randall kunnen ze werkelijkheid zijn. In een gesprek met Kennislink vertelt ze waarom, en laat ze haar licht schijnen op de recente vondst van het Higgsdeeltje.

Kijk om je heen en je kunt niet anders concluderen dan dat de wereld bestaat uit drie dimensies: voor/achter, links/rechts en boven/beneden, simpel gezegd. En dan heb je nog de tijd als vierde dimensie en is het verhaal wel compleet, toch?

Niet volgens de Amerikaanse theoretisch natuurkundige prof.dr. Lisa Randall. Volgens haar bevat ons universum extra dimensies; misschien wel oneindig groot, maar onzichtbaar voor ons. Met dit theoretisch model verwierf ze in één klap internationale faam. En uit het feit dat ze sindsdien één van de meest geciteerde natuurkundigen is, blijkt wel dat men haar zeer serieus neemt.

http://www.kennislink.nl/publicaties/de ... s-aantonen
Voor de meer serieuzere insteek mens hier ander topic: index.php?option=com_kunena&func=view&c ... =120#58242
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do 25 okt 2012, 19:54

:silly:

Ik ruik weer onderzoeksgeld


Astronomen worstelen al enige tijd met een mysterie. De hemel is namelijk gevuld met een diffuse infraroodgloed, waarvan de herkomst onbekend is. Er wordt namelijk meer infraroodlicht waargenomen dan mogelijk zou moeten zijn, gelet op het aantal bekende sterrenstelsels.

bron: http://www.astroblogs.nl/2012/10/25/zij ... et-donker/



A: een rood gat
B: donkerrode materie
C: onzichtbaar rood licht.
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Lid geworden op: vr 17 dec 2010, 23:04

do 25 okt 2012, 23:48

D: het universum heeft haar 'tijd van de maand'
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do 15 nov 2012, 10:41

Heil MASS-ias, tijd voor weer wat rolstoel MASS-trubatie ;)


Higgs particle is a bog Standard Model boson, say scientists

Fresh data from the LHC suggest the Higgs boson is unlikely to pave the way to a profound new understanding of nature
http://www.guardian.co.uk/science/2012/ ... odel-boson


Scientists working at the Large Hadron Collider have found no evidence that the new particle discovered earlier this year is anything but the simplest – and most boring – variety of Higgs boson.

Staff at Cern, the particle physics lab near Geneva, celebrated in July after they found what looked like the elusive boson amid the debris of scores of high-energy collisions inside the huge machine.

At the time, preliminary results from the two main experiments, Atlas and CMS, hinted that the particle might be something more exciting than the singular beast originally described in equations nearly 50 years ago. A more exotic Higgs could pave the way to a profound new understanding of nature.

But fresh data released by both teams at a conference in Kyoto today show that – so far at least – there is nothing peculiar about the particle's behaviour. The results do not completely rule out a more exotic Higgs particle, though. Some versions would look so much like the so-called Standard Model Higgs boson they could take years to identify.

"The particle is still there, and it's certainly staying consistent with the Standard Model," said Joe Incandela, head of the CMS detector team.

The Higgs particle was first postulated in 1964 as a single entity whose existence betrays an invisible field that spreads through space and gives mass to fundamental particles, including the basic building blocks of matter.

But some theories that go beyond the Standard Model – a mathematical framework that describes the known particles and their interactions – call for families of Higgs particles, where each sibling plays a role in conferring mass on elementary particles.

Different kinds of Higgs particles are generally expected to leave distinct signatures in the LHC's giant detectors, though in some cases, those signatures differ only in very subtle ways.

One reason the Higgs boson took more than two decades to find is that it is spectacularly unstable. As soon as the boson is created, it disintegrates into more familiar particles, including quarks, electrons and photons. Scientists looked for an excess of these particles, which would imply that the Higgs boson had been created.

When Cern first reported the discovery of a Higgs-like particle in July, both teams saw what might have been the first signs of an exotic variety of Higgs boson. The particle seemed to disintegrate too often into energetic photons called gamma particles, and not often enough into taus, the heavy cousins of electrons. The numbers were too small to stoke up excitement, but if the discrepancies had grown, the case for an exotic Higgs would have xbecome more convincing.

The new results, based on far more collisions than were gathered in July, show that all the decays fall in line with the Standard Model. However, neither team updated their results for Higgs particles disintegrating into gamma particles, which may still harbour signs of an unusual Higgs at work.

The discovery of a more exotic Higgs boson would thrill particle physicists and mark a huge leap forward in human knowledge. Some versions of a theory called supersymmetry anticipate five different Higgs bosons. The theory doubles the number of particle types in the universe, shows how common forces of nature once combined as one, and hints at the make-up of dark matter, the invisible substance that clumps around galaxies.

John Ellis, a former head of theory at Cern, who is now at Kings College London, said of the results: "The Standard Model still rules OK, but the main test will come when the gamma rates are updated."
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vr 21 dec 2012, 18:01

En maar roepen dat de wetenschap dingen verklaart maar wel ondertussen vermoedelijk en vrijwel zeker gebruiken om eigen geklungel te verbloemen.
:dodeca: "Het is nog een theorie"



'God-deeltje' wetenschappelijk hoogtepunt 2012
20 december 2012 20:06
http://www.nu.nl/wetenschap/2988246/god ... -2012.html


NEW YORK - De ontdekking van wat vermoedelijk het Higgs-bosondeeltje is, is door het Amerikaanse natuurwetenschappelijke tijdschrift Science uitgeroepen tot het wetenschappelijke hoogtepunt van 2012.

Het bestaan van het elementaire deeltje, dat alle andere deeltjes massa geeft, werd in juli vrijwel zeker aangetoond door het Europees Centrum voor Kernonderzoek (CERN)

Meer [strike]subsidie[/strike] hier: http://www.nu.nl/wetenschap/2988246/god ... -2012.html
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do 07 mar 2013, 00:17

We zijn er bijna :stikkie:

'Bijna zekerheid over Higgs-boson'
6 maart 2013 22:40
http://www.nu.nl/algemeen/3361444/bijna ... boson.html

Wetenschappers zijn bijna zover dat ze kunnen concluderen dat het deeltje dat vorig jaar werd gevonden met de deeltjesversneller van het Europese onderzoekscentrum CERN in Genève daadwerkelijk het illustere Higgs-boson is.

Dat hebben de wetenschappers woensdag gezegd op een persconferentie in de Italiaanse Alpen, waar de vorderingen van het onderzoek werden toegelicht.

Het elementaire deeltje, waar lange tijd over werd getheoretiseerd, zou verklaren waarom alles in het heelal massa heeft en wordt ook wel de ontbrekende bouwsteen van de natuurkunde genoemd.

Vorig jaar juli maakten wetenschappers bekend dat ze met behulp van de deeltjesversneller, de Large Hadron Collider, een deeltje hadden aangetroffen dat erg leek op het Higgs-deeltje. Sindsdien is de wetenschap op zoek naar de bevestiging van de vondst.
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do 07 mar 2013, 00:20

ach ja we poetsen een een 3 a 5 tigelectrogigavolt weg en dan is de boekhouder ook weer te vreden....
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do 07 mar 2013, 00:22

[quote=""dodeca" post=69500"]ach ja we poetsen een een 3 a 5 tigelectrogigavolt weg en dan is de boekhouder ook weer te vreden....[/quote]





:D
illuminati of my own reality
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za 20 jul 2013, 00:08

Solidere verklaring universum na ontdekkingen
19 juli 2013 23:18
http://www.nu.nl/wetenschap/3530831/sol ... ingen.html


Na een jarenlange zoektocht zijn wetenschappers erachter gekomen hoe een bepaald subatomair deeltje vervalt tot iets anders.

-knip-

Het onderzoek naar het Bs-meson toont dat slechte enkele Bs-deeltjes per miljard vervallen tot muon-paren, wat in het standaardmodel al werd voorspeld.

-knip-

Het gaat hierbij om een nog niet bekende derde wijze waarop neutrino's, deeltjes die door hun extreem lage massa zeer moeilijk zijn waar te nemen, spontaan van identiteit kunnen wisselen.
-knip-
eeeh een bepaald ? ... tot iets .... ??? :wodan: BS-meson, Bull Shit-meson ??? niet bekende ... :drunky:

:abgassen:
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di 24 jun 2014, 17:16

24/06/14, 13u57

Als het Higgsdeeltje bestaat, zou het heelal al een fractie na het ontstaan weer in elkaar gestort moeten zijn. Dat stellen Britse kosmologen van King's College in Londen nadat ze onderzoeken naar het Higgsdeeltje vergeleken met recent bewijs voor de oerknal.
In maart kwamen onderzoekers voor het eerst met direct bewijs voor de oerknal en de daaropvolgende exponentiële uitbreiding van het universum. Niet alle wetenschappers kunnen zich echter vinden in de resultaten van dat onderzoek. Een team van Britse kosmologen, onder leiding van Robert Hogan, bekeek nu wat het omstreden onderzoek zou betekenen voor de stabiliteit van ons universum.

http://www.demorgen.be/dm/nl/992/Wetens ... aken.dhtml
Twee bewijzen, met elkaar uitsluitende conclusies ;)
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di 24 jun 2014, 17:20

Da's nou wetenschap jonguh!

En daar baseren vele zgn. radionele mensen hun wereldbeeld op, alles wat daarbuiten valt is charlatannerie, oplichting, flauwekul, voodoo of nog iets engers.
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zo 05 okt 2014, 12:37

Sinds de jaren 1930 zijn wetenschappers op zoek naar deeltjes die gelijktijdig materie en antimaterie zijn. Nu hebben natuurkundigen in een supergeleidend materiaal sterk bewijs voor een dergelijke entiteit gevonden. De ontdekking zou het eerste zogeheten Majorana-deeltje kunnen vertegenwoordigen en zou onderzoekers kunnen helpen om informatie voor kwantumcomputers te coderen.

http://www.nujij.nl/wetenschap/nieuw-de ... 4188.lynkx
New particle is both matter and antimatter

Researchers see signature of 'Majorana particles' inside superconducting iron.
Clara Moskowitz

03 October 2014
http://www.nature.com/news/new-particle ... er-1.16074

(bijhorend filmpje op de site)

Since the 1930s scientists have been searching for particles that are simultaneously matter and antimatter. Now physicists have found strong evidence for one such entity inside a superconducting material. The discovery could represent the first so-called Majorana particle, and may help researchers encode information for quantum computers.

Physicists think that every particle of matter has an antimatter counterpart with equal mass but opposite charge. When matter meets its antimatter equivalent, the two annihilate one another. But some particles might be their own antimatter partners, according to a 1937 prediction by Italian physicist Ettore Majorana (see 'A solid case for Majorana fermions'). For the first time researchers say they have imaged one of these Majorana particles, and report their findings in the 3 October Science1.

The new Majorana particle showed up inside a superconductor, a material in which the free movement of electrons allows electricity to flow without resistance. The research team, led by Ali Yazdani of Princeton University in New Jersey, placed a long chain of iron atoms, which are magnetic, on top of a superconductor made of lead. Normally, magnetism disrupts superconductors, which depend on a lack of magnetic fields for their electrons to flow unimpeded. But in this case the magnetic chain turned into a special type of superconductor in which electrons next to one another in the chain coordinated their spins to simultaneously satisfy the requirements of magnetism and superconductivity. Each of these pairs can be thought of as an electron and an antielectron, with a negative and a positive charge, respectively. That arrangement, however, leaves one electron at each end of the chain without a neighbor to pair with, causing them to take on the properties of both electrons and antielectrons — in other words, Majorana particles.

meer hier: http://www.nature.com/news/new-particle ... er-1.16074
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di 11 nov 2014, 00:33

Chuck Bednar for redOrbit.com – Your Universe Online

More than two years after physicists from the European Organization for Nuclear Research (CERN) announced the discovery of a new subatomic particle, scientists continue to debate whether or not the new elementary particle they detected was actually the elusive Higgs boson.

On July 4, 2012, CERN director general Rolf Heuer announced that his team had detected “a particle consistent with the Higgs boson,” and that the discovery was confirmed by two separate experiments (ATLAS and CMS). However, Heuer noted that additional data was required to confirm that it was, in fact, the so-called “God particle.”

Now, in research published last week in the journal Physical Review D, Mads Toudal Frandsen, associate professor at the University of Southern Denmark’s Center for Cosmology and Particle Physics Phenomenology, and his colleagues said that existing CERN data about the particle was inconclusive. They wrote that it was possible that CERN had found the Higgs boson, but equally possible the particle was something else.

While the researchers note that there are many calculations that indicate the particle discovered in CERN’s Large Hadron Collider (LHC) in 2013 was indeed the Higgs particle, that there was no conclusive evidence to prove that. However, they said that most physicists do agree the experiments did discover a never before seen particle.

“The CERN data is generally taken as evidence that the particle is the Higgs particle. It is true that the Higgs particle can explain the data but there can be other explanations, we would also get this data from other particles,” Frandsen explained in a statement. “The current data is not precise enough to determine exactly what the particle is.”

“It could be a number of other known particles,” he added. “We believe that it may be a so-called techni-higgs particle. This particle is in some ways similar to the Higgs particle – hence half of the name. A techni-higgs particle is not an elementary particle. Instead, it consists of so-called techni-quarks, which we believe are elementary.”

Frandsen explained that techni-quarks could bind together in a variety of ways to form different objects – some combinations could create techni-higgs particles, while others could form dark matter. Therefore, he and his colleagues believe that physicists will find several different particles, each built by techni-quarks, at the LHC.

The techni-higgs particle and Higgs particle can easily be confused in experiments, the researchers explained. Though similar, they are two vastly different particles belonging to two vastly different theories of how the universe was created. While the Higgs boson is the missing piece in the Standard Model of particle physics, a techni-higgs particle, if it exists, would require the presence of a force to bind them together in order to form particles.

“None of the four known forces of nature (gravity, the electromagnetic force, the weak nuclear force and the strong nuclear force) are any good at binding techni-quarks together,” the University of Southern Denmark explained. “There must therefore be a yet undiscovered force of nature. This force is called the technicolor force.”

“What was found last year in CERN’s accelerator could thus be either the Higgs particle of the Standard Model or a light techni-higgs particle, composed of two techni-quarks,” it added, noting that Frandsen’s team “believes that more data from CERN will probably be able to determine if it was a Higgs or a techni-higgs particle. If CERN gets an even more powerful accelerator, it will in principle be able to observe techni-quarks directly.”

http://www.redorbit.com/news/science/11 ... ve-110914/
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za 24 jan 2015, 22:37

Physicists Slow Speed of Light


By William J. Cromie

Gazette Staff


Light, which normally travels the 240,000 miles from the Moon to Earth in less than two seconds, has been slowed to the speed of a minivan in rush-hour traffic -- 38 miles an hour.

An entirely new state of matter, first observed four years ago, has made this possible. When atoms become packed super-closely together at super-low temperatures and super-high vacuum, they lose their identity as individual particles and act like a single super- atom with characteristics similar to a laser.

Such an exotic medium can be engineered to slow a light beam 20 million-fold from 186,282 miles a second to a pokey 38 miles an hour.

"In this odd state of matter, light takes on a more human dimension; you can almost touch it," says Lene Hau, a Harvard University physicist.

Hau led a team of scientists who did this experiment at the Rowland Institute for Science, a private, nonprofit research facility in Cambridge, Mass., endowed by Edwin Land, the inventor of instant photography.

Afbeelding
Lene Hau has shed new light on a new form of matter. Photo by MaryAnn Nilsson.

In the future, slowing light could have a number of practical consequences, including the potential to send data, sound, and pictures in less space and with less power. Also, the results obtained by Hau's experiment might be used to create new types of laser projection systems and night vision cameras with power requirements a million times less than what is presently possible.

But that's not why Hau, a research scientist at both Harvard and the Rowland Institute, originally set out to do the experiments. "We did them because we are curious about this new state of matter," she says. "We wanted to understand it, to discover all the things that can be done with it."

It took Hau and three colleagues several years to make a container of the new matter. Then followed a series of 27-hour-long trial runs to get all the parts and parameters working together.

"So many things have to go right," Hau comments. "But the results finally exceeded our expectations. It's fascinating to see a beam of light almost come to a standstill."

Afbeelding
Lene Hau, Zachary Dutton, and Cyrus Behroozi (from left to right) stand by the equipment they used to create the ultra-high vacuum and super-low temperatures with which they slowed down pulses of light. The process also compresses the pulses from 2,500 feet to 0.002 inches in length. Photo by MaryAnn Nilsson.

Members of Hau's team included Harvard graduate students Zachary Dutton and Cyrus Behroozi. Steve Harris from Stanford University served as a long-distance collaborator.

Making a Super-atomic Cloud

The idea of this new kind of matter was first proposed in 1924 by Albert Einstein and Satyendra Nath Bose, an Indian physicist. According to their theory, atoms crowded close enough in ultra-low temperatures would lock together to form what Hau calls "a single glob of solid matter which can produce waves that behave like radio waves."

This so-called Bose-Einstein condensate was not actually made until 1995, because the right technological pot to cook it up in did not exist. Vacuums hundreds of trillions of times lower than the pressure of air at Earth's surface, and temperatures almost a billion times colder that that in interstellar space, are needed to produce the condensate. Temperatures must be lowered to within a few billionths of a degree of absolute zero (minus 459.7 degrees F), where atoms have the least possible energy and all but cease to move around.

Hau and her group started with a beam of sodium atoms injected into a vacuum chamber and moving at speeds of more than a thousand miles an hour. These hot atoms have an orange glow, like sodium highway and street lights.

Laser beams moving at the normal speed of light collide with the atoms. As the atoms absorb particles of light (photons), they slow down. The laser light also orders their random movement so they move in only one direction.

When the atoms are slowed to a modest 100 miles an hour or so, the experimenters load the atoms into what they call "optical molasses," a web of more laser beams. Each time an atom collides with a photon it is knocked back in the direction from which it came, further slowing it down, or cooling it.

The atoms are now densely packed in a cigar-shaped clump kept floating free of the walls of their container by powerful magnetic fields.

"It's nifty to look into the chamber and see the clump of cold atoms floating there," Hau remarks.

In the final stage, known as "evaporative cooling," atoms still too hot or energetic are kicked out of the magnetic field.

The stage is now set for slowing light. One laser is shot across the width of the cloud of condensate. This controls the speed of a second pulsed laser beam shot along the length of the cloud. The first laser sets up a "quantum interference" such that the moving light beams of the second laser interfere with each other. When everything is set up just right, the light can be slowed by a factor of 20 million.

The process is described in detail in the Feb. 18 issue of the scientific journal Nature. (Warning: Don't try this at home.)

Relativity and the Internet

Slowing light this way doesn't violate any principle of physics. Einstein's theory of relativity places an upper, but not lower, limit on the speed of light.

According to relativity theory, an astronaut traveling at close to the speed of light will not get old as fast as those she leaves behind on Earth. But driving at 38 miles an hour, as everyone knows, will not affect anyone's rate of aging.

"However, slowing light can certainly help our understanding of the bizarre state of matter of a Bose-Einstein condensate," Hau points out.

And a system that changes light speed by a factor of 20 million might be used to improve communication. It can be used to greatly reduce noise, which allows all types of information to be transmitted more efficiently. Also, optical switches controlled by low intensity light could cut power requirements a million-fold compared to switches now operating everything from telephone equipment to supercomputers.

But what about the cost and exotic equipment needed for such improvements? "Technologies that push past old limits are always expensive and impractical to begin with; then they become cheaper and more manageable," Hau says matter-of-factly. She sees the possibility that slow light will lead to "significant advances in communications ten years from now, if we get to work on it right away."

What will she do next?

Hau sweeps her hand over a roomful of equipment and explains how things are already being set up to slow light speed even more, to one centimeter (less than a half-inch) a second. That's a leisurely 120 feet an hour.

Hau will give a lecture on her experiments at 4:30 p.m. on Monday, Feb. 22, at Room 250, Jefferson Laboratories.
via:-> http://news.harvard.edu/gazette/1999/02.18/light.html
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