Huge Dark Matter Experiment Finds Nothing but More Mysteries.
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Physicists face major setback in search for mysterious substance as Lux dark matter detector draws a blank. Read more:
One and a half years ago we had already on this website an article about dark matter:
“The more astronomers research dark matter the more mysteries appear.
2012 Mar 08 (3) – Something is desperately wrong.”
So they did not find dark matter and that reminds me of them not finding where
2012 May 02 – Cosmic radiation
comes from. That was the experiment at the South Pole with the IceCube, where they hoped to find evidence to prove that neutrinos come from gamma ray busts.
Today I again read articles about dark matter. Here excerpts from two articles:
Huge Dark Matter Experiment Finds Nothing but More Mysteries
The hunt for dark matter just keeps getting more confusing. Today scientists released findings from the first three months of the Large Underground Xenon experiment, which looks directly for the invisible particles thought to make up dark matter.
Many physicists hoped that the highly anticipated results would clear up the situation surrounding dark matter experiments, which have so far led to contradictory conclusions about the nature of the mysterious substance. Some thought that LUX might show them which way to go, narrowing the types of particles they might pursue. Instead, the experiment turned up empty.
“Basically, we saw nothing. But we saw nothing better than anyone else so far.”
But scientists have no idea what dark matter is nor what possible exotic properties it might have. It could simply be that assumption is wrong and nature is more complex than the simplest models would suggest.
Dark matter stays hidden as detector fails to see a single particle
Physicists face major setback in search for mysterious substance as Lux dark matter detector draws a blank
The world's most advanced instrument for detecting dark matter - the invisible substance thought to account for most of the matter in the universe - has ended its first three months of service without catching a hint of the stuff.
Sat a mile underground in a defunct gold mine in South Dakota, the Large Underground Xenon (Lux) experiment aims to detect dark matter particles as they drift through the Earth. It is the most sensitive detector for the mysterious substance ever made.
The failure to even glimpse dark matter means that tentative sightings by other experiments are almost certainly false. The Lux results do not rule out the existence of dark matter, but instead narrow down the possible forms it might take.
"We saw nothing. We do not have a single dark matter candidate event."
The nature of dark matter has mystified scientists for 80 years, since the Swiss astronomer Fritz Zwicky noticed that galaxies rotated in such a way that they must contain more matter than was visible. His observations have been confirmed time and again in recent decades. Around 85% of the matter in the universe is now thought to be "dark", meaning it neither emits nor reflects light.
Measurements by the European Space Agency's Planck mission showed in March that normal matter - the stuff of stars, planets and people - accounts for less than 5% of the mass-energy in the observable universe, while dark matter makes up around 27%. The rest of the cosmos, around 68%, is labelled dark energy and is thought to be the driving force behind the expansion of the universe.
"We have entered the new millennium and yet we still have no idea what 95% of the universe is made of. Our level of ignorance is quite staggering, and it's one of the largest challenges we have right now."
"We don't really know what the universe is made of."
"Without dark matter we know very little about how the universe really evolved and what its fate is."
"The overwhelming evidence from cosmology is there has to be something out there that is like dark matter, but that is the only statement we can make. All we know is there is this thing that clumps but we don't know anything about its properties. We have nothing to go on. If we could find the dark matter, our amount of information increases dramatically. From zero."
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