Neu-Trino
Neutrino Floor
And
High Mass
29 October 2020
A 2020 article titled "Can we overcome the neutrino floor at high masses?" written by Ciaran A. J. O'Hare was published in arXiv:2002.07499 (astro-ph).
The author writes, "The neutrino floor is a barrier in the parameter space of weakly interacting massive particles (WIMPs) below which discovery is impeded due to an almost irreducible background of neutrinos."
Can we
overcome
the neutrino
floor
at high
masses?
The author notes, "Directional gas time projection chambers could discriminate against solar neutrinos, relevant for WIMP masses ≲10 GeV."
The writer addresses, "At higher masses ≳100 GeV the floor is set by the background of atmospheric neutrinos. Probing below this part of the floor would require very large target exposures."
Can we
overcome
the neutrino
floor
at high
masses?
The author explains, "Since gas-based detectors would be prohibitively large at this scale, we instead reevaluate the prospects for liquid noble experiments to probe below the neutrino floor."
"We combine," writes the author, "all potential methods of subtracting the neutrino background to determine how much of this difficult to reach, but well-motivated, parameter space it is feasible to reach."
Can we
overcome
the neutrino
floor
at high
masses?
The writer explains, " Most notably, we quantify whether a proposed directional signal in xenon and argon experiments called "columnar recombination" can help in this task."
"We find that even if the strength of this effect is amplified beyond current experimental results, the quantity of directional information contained in the recombination signal is too low to realistically discriminate against the atmospheric neutrino background," adds tge author.
Can we
overcome
the neutrino
floor
at high
masses?
The writer of the article continues, "Instead, benefiting from the refined measurements of neutrino fluxes by experiments such as DUNE and JUNO will be the most practical means to push direct WIMP searches below the neutrino floor."
The author goes on to say, "For an ultimate global coordination of xenon and argon experiments, we show that the neutrino floor is a surmountable barrier."
"The direct detection of 100 GeV-scale supersymmetric WIMPs may, eventually, be within reach," explains the author.
Can we
overcome
the neutrino
floor
at high
masses?
Dark Matter
And
Neutrino
29 October 2020
A March 2019 issue of the Forbes magazine published an article entitled "How Much Of The Dark Matter Could Neutrinos Be?" written by Ethan Siegel, a senior contributor of the magazine.
The author writes, "When we look out at the stars moving around within galaxies, the galaxies moving withing groups and clusters, or the largest structures of all that make up the cosmic web, everything tells the same disconcerting story: we don’t see enough matter to explain the gravitational effects that occur."
"In addition to the stars," notes the writer, "gas, plasma, dust, black holes and more, there must be something else in there causing an additional gravitational effect."
Source:
How Much
Of The
Dark Matter
Could
Neutrinos
Be?"
The writer addresses, "Traditionally, we’ve called this dark matter, and we absolutely require it to explain the full suite of observations throughout the Universe."
Tge author explains, "While it cannot be made up of normal matter — things made of protons, neutrons, and electrons— we do have a known particle that could have the right behavior: neutrinos."
"Let’s find out how much of the dark matter neutrinos could possibly be," adds the writer.
Source:
How Much
Of The
Dark Matter
Could
Neutrinos
Be?"
The author explains, "At first glance, neutrinos are the perfect dark matter candidate."
"They barely interact at all with normal matter," notes the writer, "and neither absorb nor emit light, meaning that they won’t generate an observable signal capable of being picked up by telescopes."
The writer goes on to address, "At the same time, because they interact through the weak force, it’s inevitable that the Universe created enormous numbers of them in the extremely early, hot stages of the Big Bang."
Source:
How Much
Of The
Dark Matter
Could
Neutrinos
Be?"
The senior contributor to the Forbes magazine addresses, "We know that there are leftover photons from the Big Bang, and very recently we’ve also detected indirect evidence that there are leftover neutrinos as wellUnlike the photons, which are massless, it’s possible that neutrinos have a non-zero mass."
"If they have the right value for their mass based on the total number of neutrinos (and antineutrinos) that exist, they could conceivably account for 100% of the dark matter," the author explains.
Source:
How Much
Of The
Dark Matter
Could
Neutrinos
Be?"
March 7,
2008.
By Kitta
MacPherson:
Satellite
reveals
treasure
trove
of
data,
including
evidence
for early
universe
neutrinos
