A Major Milestone for an Underground Dark Matter Search Expe

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A Major Milestone for an Underground Dark Matter Search Expe

Postby socrat44 on October 28th, 2020, 6:12 am 

A Major Milestone for an Underground Dark Matter Search Experiment
News Release, Glenn Roberts Jr. • October 27, 2020
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Crews working on the largest U.S. experiment designed to directly detect dark matter completed a major milestone last month, and are now turning their sights toward startup after experiencing some delays due to global pandemic precautions.
U.S. Department of Energy officials on Sept. 21 formally signed off on project completion for LUX-ZEPLIN, or LZ: an ultrasensitive experiment that will use 10 metric tons of liquid xenon to hunt for signals of interactions with theorized dark matter particles called WIMPs, or weakly interacting massive particles. DOE’s project completion milestone is called Critical Decision 4, or CD-4.

Dark matter makes up an estimated 85 percent of all matter in the universe. We know it’s there because of its observed gravitational effects on normal matter, but we don’t yet know what it is. LZ is designed to detect the two flashes of light that occur if a WIMP interacts with the nucleus of a xenon atom.

https://newscenter.lbl.gov/2020/10/27/a ... xperiment/
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Re: A Major Milestone for an Underground Dark Matter Search

Postby socrat44 on October 28th, 2020, 9:47 am 

The LUX-ZEPLIN, or LZ would search for dark matter
"makes up an estimated 85 percent of all matter in the universe ''
as result of '' gravitational effects'' . . .
LUX-ZEPLIN, or LZ would search for ''gravitons'' . . . nearly a mile below ground
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Re: A Major Milestone for an Underground Dark Matter Search

Postby socrat44 on October 28th, 2020, 10:59 am 

The dark matter detective

High energy physicist Professor Elisabetta Barberio is leading groundbreaking Australian research in the hunt for dark matter and it’s all happening deep underground . . .

''We know that there is a lot of dark matter in the galaxy. Between 70 and 80 per cent of the material in the galaxy is dark matter and so, every single second, billions of these dark matter particles pass through our bodies and don’t do anything to us. We are transparent to these particles.'' . . .

''The Stawell Underground Physics Laboratory (SUPL) is being built 1025 meters below ground. Once we have results, we’ll compare those with the results from detectors in other parts of the world'' . . . .

https://pursuit.unimelb.edu.au/articles ... -detective
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Re: A Major Milestone for an Underground Dark Matter Search

Postby socrat44 on October 29th, 2020, 3:37 am 

A billion tiny pendulums could detect the universe's missing mass
Researchers have proposed a novel method for finding dark matter
Date: October 14, 2020
Source: National Institute of Standards and Technology (NIST)
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Dark matter makes up about 27% of the universe; ordinary matter, such as the stuff that builds stars and planets, accounts for just 5% of the cosmos. (A mysterious entity called dark energy accounts for the other 68%.)
According to cosmologists, all the visible material in the universe is merely floating in a vast sea of dark matter -- particles that are invisible but nonetheless have mass and exert a gravitational force. Dark matter's gravity would provide the missing glue that keeps galaxies from falling apart and account for how matter clumped together to form the universe's rich galactic tapestry.
"Our proposal relies purely on the gravitational coupling, the only coupling we know for sure that exists between dark matter and ordinary luminous matter," said study co-author Daniel Carney, a theoretical physicist . . .
( the search for ''so-called Planck mass'' particles ) by . . . . ''tiny, millimeter-size mechanical devices acting as exquisitely sensitive gravitational detectors. The sensors would be cooled to temperatures just above absolute zero . . . to minimize heat-related electrical noise and shielded from cosmic rays and other sources of radioactivity ''

https://www.sciencedaily.com/releases/2 ... 160510.htm
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Re: A Major Milestone for an Underground Dark Matter Search

Postby curiosity on October 30th, 2020, 9:11 pm 

If dark matter is actually proven to exist, by results from these or any other experiment, then a major milestone will indeed have been reached, but until in the unlikely event that ever happens, no hypothetical chickens should be counted.

I'm not a proponent of dark matter, and believe that what many think are gravitational effects due to the presence of hypothetical dark matter, in reality result from misconceptions about the true nature of gravitation.

Time will tell...
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Re: A Major Milestone for an Underground Dark Matter Search

Postby socrat44 on October 31st, 2020, 2:09 am 

ALICE’s dark side
30 October 2020
The nature of dark matter (DM) remains one of the most intriguing unsolved questions of modern physics. Astrophysical and cosmological observations suggest that DM accounts for roughly 27% of the mass-energy of the universe, with dark energy comprising 68% and ordinary baryonic matter as described by the Standard Model accounting for a paltry 5%.
Maximiliano Puccio, CERN and Ivan Vorobyev, Technishe Universität München

https://cerncourier.com/a/alices-dark-s ... h3bFLysJSE
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Re: A Major Milestone for an Underground Dark Matter Search

Postby socrat44 on October 31st, 2020, 2:22 am 

curiosity » October 30th, 2020, 9:11 pm wrote:I'm not a proponent of dark matter, and believe that what many think are gravitational effects due to the presence of hypothetical dark matter, in reality result from misconceptions about the true nature of gravitation.

Time will tell...


Newton's gravity is interaction betweeen two bodies
Einstein's GRT is gravity effect of one single local body in the 4D
Gravity is local cosmic phenomena
(not universal for the universe as whole)
#
Searching ''dark matter'' as a result of cosmic gravitation effect is useless work
“It's very difficult to find a black cat in a dark room,
especially if there is no black cat”
/ Confucius /
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Re: A Major Milestone for an Underground Dark Matter Search

Postby socrat44 on November 1st, 2020, 3:44 am 

Dark Matter
Many researchers search in sundry ways for indirect evidence of quantum gravitational effects.
''The trouble is that quantum gravitational effects occur at the Planck scale,
a trillionth of a trillionth of the diameter of a hydrogen atom.
Our earthly observational instrumentation is currently not equipped
to inquire at such small scale, because the equivalent required energies
far exceed the maximum limits of the present-day generation of particle detectors.''

maybe ''gravitons'' is better to scearch in the Cosmic Vacuum than ''nearly a mile below ground'' . . .
maybe Dark Matter ( in the Cosmic Vacuum ) consist of ''gravitons'' . . .
maybe the Cosmic Vacuum (itself) contains all ''gravitons'' secrets . . .
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Re: A Major Milestone for an Underground Dark Matter Search

Postby socrat44 on November 1st, 2020, 10:46 am 

Physicists Argue That Black Holes From the Big Bang Could Be the Dark Matter:

It was an old idea of Stephen Hawking’s: Unseen “primordial” black holes might be the hidden dark matter. It fell out of favor for decades, but a new series of studies has shown how the theory can work.

Joshua Sokol, September 23, 2020

https://www.quantamagazine.org/black-ho ... -20200923/
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Re: A Major Milestone for an Underground Dark Matter Search

Postby socrat44 on November 1st, 2020, 11:48 am 

Japan’s KAGRA searches the sky for gravitational waves
10/29/20, By Liz Kruesi

The newly operational KAGRA will bump the number of gravitational-wave
observatories to four, which will allow scientists to better triangulate
the source of ripples in space-time.

https://www.symmetrymagazine.org/articl ... JG4QBge35E
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