What is direct detection of dark matter?

Pointing a telescope at the sky and photographing dark matter clouds Using sensitive underground detectors to catch a dark matter particle colliding with an atomic nucleus and depositing a tiny amount of energy Measuring the rotation curves of galaxies to count dark matter halos Analyzing gravitational lensing maps to detect dark matter concentrations

Why are dark matter detectors placed deep underground?

Dark matter sinks to the ground and is concentrated underground The rock above shields the detector from cosmic ray particles that would otherwise trigger false signals and overwhelm the rare dark matter signal Underground temperatures are colder, which makes dark matter more likely to interact Underground detectors are cheaper to build than space-based detectors

Why do direct detection experiments use liquid xenon as their detector material?

Xenon is radioactive and therefore sensitive to dark matter radiation Xenon is the only element that interacts with WIMPs Xenon is a heavy, dense element that can be made extremely pure, and it produces both light and electrical signals when a particle interacts inside it Liquid xenon is at absolute zero temperature, which is needed for the experiment

What is the LUX-ZEPLIN (LZ) experiment?

A satellite telescope searching for dark matter gamma-ray emissions A particle accelerator designed to produce WIMPs by smashing protons together A large liquid xenon dark matter direct detection experiment located deep underground in the Sanford Underground Research Facility in South Dakota A radio telescope array listening for signals from dark matter annihilation

How might the Large Hadron Collider (LHC) at CERN detect dark matter?

By directly photographing dark matter particles as they exit the collision By smashing protons together at high energies and looking for events where energy appears to go missing — carried away by an undetected dark matter particle By using the Higgs boson as a beacon to attract dark matter to the detector By measuring the mass of dark matter halos that the LHC creates

What is indirect detection of dark matter?

Finding dark matter in laboratory experiments by shining light on it Searching for the products (such as gamma rays, neutrinos, or positrons) that would be released if dark matter particles annihilate or decay Detecting the X-ray glow produced when dark matter falls into black holes Measuring changes in a galaxy's rotation curve as dark matter moves around

What is MOND, and what problem does it face?

Massive Object Nucleon Detection — a type of underground dark matter detector Modified Newtonian Dynamics — a theory that changes the law of gravity at low accelerations to explain rotation curves without dark matter, but it cannot explain the Bullet Cluster Macro Observable Neutrino Detector — a telescope searching for dark matter neutrinos A particle physics model that predicts dark matter is made of modified photons

Where do indirect detection experiments look for signs of dark matter annihilation?

In the atmosphere of Jupiter, where dark matter particles are captured At the galactic center and in dwarf satellite galaxies, where dark matter is predicted to be most dense Near the Sun, where solar wind can scatter dark matter into detectable paths In galaxy voids, where dark matter accumulates in the absence of ordinary matter

Which space telescope has been searching for gamma-ray signatures of dark matter annihilation?

The James Webb Space Telescope The Chandra X-ray Observatory The Fermi Gamma-ray Space Telescope The Hubble Space Telescope

What does each failed dark matter search tell scientists, even if no signal is found?

Nothing — if dark matter is not found, the experiment was a waste of resources It proves dark matter does not exist and that MOND is correct It rules out specific combinations of dark matter mass and interaction strength, narrowing down where dark matter can hide It means the detector needs to be repaired before it can find anything

Which experiment is located in the Gran Sasso underground laboratory in Italy and uses liquid xenon?

LUX-ZEPLIN ADMX XENONnT IceCube