Minnesota researcher's findings on dark matter jibe with Italy's DAMA/LIBRA claims

May 05, 2011 by Bob Yirka weblog

(PhysOrg.com) -- Sparking controversy in the small circle of physicists working to resolve the issue of whether dark matter actually exists, Juan Collar, spokesman for the CoGeNT project in the Soudan mine in Minnesota, spoke recently at the American Physical Society meeting and disclosed that his team has found results similar to those experienced by the DAMA/LIBRA team in Italy over the past several years, which show an excess of low energy interactions in their germanium crystal detectors, that his group can’t explain any other way but to ascribe it to the existence of dark matter.

The DAMA/LIBRA team has insisted for 12 years that the data it has found with its detectors backs up the theory that not only does dark matter exist, but that it can be shown to exist by seasonal changes in the amount of recoil hitting in their germanium . The idea is that because the Earth moves and supposed clouds of dark matter don’t, there should be times of higher activity when the Earth is moving into or through an area of dense dark matter, and lower activity when it’s not. This is the basis of the argument the DAMA/LIBRA team has had to explain the seasonal changes in the number of hits they see.

The problem with all this though is that there are other teams that have not been able to reproduce the results shown first by the DAMA/LIBRA team, and now by those with the CoGeNT team (most notably the Swiss XENON100 team.) Making the whole argument even more sensational is that the CoGeNT team actually set out to prove to the world that the DAMA/LIBRA team was wrong.

All of the teams are working to prove or disprove the notion that theoretical particles of dark matter, called WIMPS, exist and thus can be used, or not to back up or refute many other theories that serve to explain many of the unexplained phenomena that exist in the universe; such as what holds everything together. Some theories suggest that if does truly exist, it likely makes up eighty percent of everything there is; if it doesn’t however, a lot of will be going back to the drawing board.

One thing is certain however, and that is much more research will have to be done, both by those that are seeing results and those that aren’t, before anyone can even come close to claiming they understand the invisible forces that make the universe what it is.

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User comments : 12

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lengould100
1.8 / 5 (4) May 05, 2011
MOG, (STVG) John Moffat. Reasonably explains known phenomena without dark matter OR dark energy. Above is anamolous theorizing without evidence.

http://www.johnwm...lk09.pdf
east
4.5 / 5 (2) May 05, 2011
I wasn't aware that clouds of dark matter aren't suppose to move. Can someone explain this a bit better or at least point out the name of this? I thought that dark matter was to be treated like all other matter in the area of the effects of gravity.
Twin
not rated yet May 05, 2011
Would MOG describe Voyager Gravitational Anomalies?

See:http://www.space....zle.html
jamesrm
5 / 5 (1) May 05, 2011
wikipedia
"An important property of all dark matter is that it behaves like and is modeled like a perfect fluid, meaning that it does not have any internal resistance or viscosity.[64] This means that dark matter particles should not interact with each other (except through gravity), i.e. they move past each other without ever bumping or colliding."

"The largest part of dark matter, which does not interact with electromagnetic radiation, is not only "dark" but also, by definition, utterly transparent.[4]"

A better name would be "Magic Matter" as it magically makes many astrophysical models work.
El_Nose
1.5 / 5 (2) May 05, 2011
and why are you trying to post what dark matter is on a science forum -- we kinda already have the general idea of what it can - and cannot be
Jeffhans1
3.3 / 5 (3) May 05, 2011
I am willing to bet their findings can be explained by the Radioactive decay rates vary with the sun's rotation.
http://www.physor...660.html
CSharpner
3.7 / 5 (3) May 05, 2011
The idea is that because the Earth moves and supposed clouds of dark matter dont

Movement is a relative term. You can't say something in space "doesn't move" unless you lock it into some other object and say "it doesn't move relative to that object".

This is the basis of the argument the DAMA/LIBRA team has had to explain the seasonal changes in the number of hits they see.

Uh oh! Get ready for the "eather" kooks to use this to support their various aether theories.
kevinrtrs
1.3 / 5 (4) May 05, 2011
which show an excess of low energy interactions in their germanium crystal detectors, that his group cant explain any other way but to ascribe it to the existence of dark matter.

Strangely this sounds like the dark side of the force. Eerily reminiscent of various descriptions in books of ghosts or demons - take your pick.
Now, who would have believed that hard-headed scientists would one day come up with stories about spirits messing about with their experiments? That's what the dark matter basically boils down to doesn't it? Any which way you look at it ;-))))

TabulaMentis
1 / 5 (1) May 05, 2011
MOG, (STVG) John Moffat. Reasonably explains known phenomena without dark matter OR dark energy. Above is anamolous theorizing without evidence.
MOG may apply only in limited circumstances on galactic scales and that is a big if.
that_guy
1 / 5 (1) May 05, 2011
I disagree with kevin. It is clearly God messing with the scientist's instruments or calculations. Why? Because they're trying to invent a universe without him. If they just dialed their calculations to 6000 years tho, everything would fall right into place.

OK, sorry i couldn't help it. I know you'll all try to blam me for trying to be funny, but whatever.
Moebius
3.7 / 5 (3) May 06, 2011
This rests on the theory that there are clouds of dark matter? Why should there be measurable fluctuations in the density of dark matter over such a small scale as local to our solar system? I could understand large scale fluctuations in our galaxy but small scale that can be measured over short periods of time by the movement of the earth? Doesn't sound right.
El_Nose
not rated yet May 06, 2011
don'T VOTE THIS - JUST WANTED TO THROW IT OUT THERE

I have always wondered if one day we would come to a point where science and magic were one and the same. -- don't skip the rest -- I look at the more complex physics and it is incredible, just taking the collapse of posistioning of particles due to superposition -- it is a fact that until an object is directly observed that it can seriously be in more than one position... when we develop the ability to abstract that into we can chose where a particles postition will collapse into that will truely be science - but won't it be magical?

Indeed optical cloaking of reds has been created with the hope of a full human visible spectrum optical cloak in the works... These are no longer childrens tales and bedtime stories -- more often than not advancements today are not mimicing scifi books of the 60's but the powers of wizards in fairy tales.

teleportation, omniscient observance ( via satelite), just waiting on fireballs ;-)