https://home.cern/science/physics/matter-antimatter-asymmetry-problem
One of the greatest challenges in physics is to figure out what happened to the antimatter, or why we see an asymmetry between matter and antimatter. Antimatter particles share the same mass as their matter counterparts, but qualities such as electric charge are opposite. The positively charged positron, for example, is the antiparticle to the

https://www.youtube.com/watch?v=xZiFuiAIva8
According to current quantum theory, particles can spontaneously appear from nowhere. Since matter and antimatter are opposites, they cancel each other out a

https://en.wikipedia.org/wiki/Gravitational_interaction_of_antimatter
Antimatter is gravitationally attracted to matter. The magnitude of the gravitational force is also the same. This is predicted by theoretical arguments like the gravitational equivalence of energy and matter, and has been experimentally verified for antihydrogen. However the equivalence of the gravitational acceleration of matter to matter vs

https://physics.stackexchange.com/questions/211117/how-do-matter-and-antimatter-interact-gravitationally
If antimatter repelled gravitationally, general relativity lets you build a wormhole out of it. A wormhole allows time travel. And time travel utterly destroys the causal structure of the universe as we know it: all of science and predictability, and indeed the entire notion of time, would suddenly become meaningless.

https://en.wikipedia.org/wiki/Antimatter
In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding particles in "ordinary" matter, and can be thought of as matter with reversed charge, parity, and time, known as CPT reversal. Antimatter occurs in natural processes like cosmic ray collisions and some types of radioactive decay

https://www.space.com/matter-antimatter-same-response-to-gravity
Matter and antimatter behave the same way under the influence of gravity, a new study found, leaving scientists no wiser as to what makes the two different. Antimatter is the puzzling stuff

https://www.scientificamerican.com/article/why-is-there-more-matter-than-antimatter/
Why the universe we see today is made entirely out of matter is one of the greatest mysteries of modern physics. Had there ever been an equal amount of antimatter, everything in the universe would

https://www.energy.gov/science/doe-explainsantimatter
Antimatter is the twin of almost all the subatomic particles that make up our universe. The matter in our universe comes in many forms—solids, liquids, gasses, and plasmas. These forms of matter all consist of subatomic particles that give matter its mass and volume. These particles include protons and neutrons (also known as baryons

https://www.nature.com/articles/d41586-019-03431-5
Future work should aim to further constrain the axion-antiproton coupling and to look for evidence of interactions between axion dark matter and other forms of antimatter, such as positrons (the

https://home.cern/news/news/physics/searching-matter-antimatter-asymmetry-higgs-boson
The ATLAS and CMS collaborations have searched for matter-antimatter asymmetry in the interaction between the Higgs boson and the tau lepton. 23 June, 2022. |. By Ana Lopes. ATLAS (left) and CMS (right) candidate events for a Higgs boson decaying into a pair of tau leptons. (Image: CERN) Symmetries make the world go round, but so do asymmetries.

https://www.iop.org/sites/default/files/2019-06/Antimatter%202013_0.pdf
Matter and antimatter particles should have been created in equal numbers and should have annihilated. Somehow, some matter - but no antimatter - survived; observations indicate that all the stars and galaxies we see are made of the same version of matter as our own solar system and ourselves. Theoretical physicists think that

https://www.ucl.ac.uk/culture-online/case-studies/2022/mar/what-happens-when-matter-and-antimatter-collide
Matter-antimatter collisions create different products depending on the starting particles. When electrons and positrons annihilate each other, they make gamma rays. Protons are composed of quarks (and antiprotons of antiquarks), so these collisions involve more-complicated particle interactions. Taken from Hofstätter 2012.

https://www.sciencedaily.com/releases/2022/01/220105111441.htm
As part of this quest, scientists have explored whether matter and antimatter interact similarly with gravity, or whether antimatter would experience gravity in a different way than matter, which

https://www.astronomy.com/science/when-matter-and-antimatter-annihilate-each-other/
The interaction of matter and antimatter can release the energy from both of these forces in the form of exotic particles. (In fact, the much-sought-after Higgs boson is one form of weak-force

https://cosmosmagazine.com/science/physics/gravitational-attraction-between-matter-and-antimatter/
In practice, if matter is going to interact with antimatter, it's on the quantum scale. Problem is, our theory of gravity is a macroscopic one, developed on a scale ranging from the size of

https://www.abc.net.au/news/science/2016-06-23/antimatter-explainer/7487354
The antimatter mystery: Annihilation and a universe that shouldn't exist. Matter and antimatter are thought to have been formed in the Big Bang. (NASA) Antimatter isn't just a great plot device

https://home.cern/news/news/physics/probing-dark-matter-using-antimatter
Working at CERN's antimatter factory, the BASE team obtained the first laboratory-based limits on the existence of dark-matter axions, assuming that they prefer to interact with antimatter rather than with matter. Axions were originally introduced to explain the symmetry properties of the strong force, which binds quarks into protons and

https://phys.org/news/2018-07-results-antimatter-interact-precisely.html
Scientists have now discovered that antihydrogen and hydrogen require the same amount of energy to switch states: It takes the same amount of energy to make an electron or a positron take a

https://cms.cern/physics/what-and-where-antimatter
The 'case file' of antimatter was opened in 1928 by physicist Paul Dirac. He developed a theory that combined quantum mechanics and Einstein's special relativity to provide a more complete description of electron interactions. The basic equation he derived turned out to have two solutions, one for the electron and one that seemed to

https://bigthink.com/starts-with-a-bang/why-matter-antimatter-annihilate/
Whenever interactions occur with enough free energy to admit the creation of new particles via E = mc², the creation process always makes equal amounts of matter and antimatter.; Similarly, when

https://www.msn.com/en-us/news/technology/the-standard-model-explained-a-deep-dive-into-modern-physics-part-ii/ar-BB1oHSsy
Conversely, photons do not interact with the Higgs field, which is why they are massless. ... The Standard Model also fails to explain the abundance of matter over antimatter

https://www.physicsforums.com/threads/matter-antimatter-interactions.122094/
The interaction between matter and antimatter is a fascinating topic in physics. When a particle of matter meets its corresponding antiparticle, they both annihilate each other and release a large amount of energy in the form of gamma rays. This process is called matter-antimatter annihilation.

https://astronomy.stackexchange.com/questions/10756/how-can-we-tell-the-difference-between-matter-and-antimatter-by-observation-in-s
Tl;DR. Detection via polarized light - Antimatter interaction with polarized light could be detected by vector rotation;; We're mostly sure, because absence of gamma rays and characteristic Faraday polarization indicates absence of observable antimatter in meaningful amounts.; Long answer. I do believe @userLTK to be correct on his comment. To my limited knowledge, the absence of gamma-ray

https://www.reddit.com/r/askscience/comments/12gv2s/how_do_antimatter_and_black_holes_interact/
This is because if you had matter and anti-matter both falling into a black hole, even though they might annihilate each other, in doing so they would release energy, usually in the form of photons, and those would fall back into the black hole and increase its mass by exactly the same amount as if the matter and anti-matter hadn't annihilated.

https://www.symmetrymagazine.org/article/scaling-up-the-dark-matter-search?language_content_entity=und
Waiting for a sign . Direct-detection experiments aim to spy an interaction between the nucleus of an atom and a theorized bit of dark matter. For nearly a century, astronomers have collected strong evidence that dark-matter particles exist in our galaxy and throughout the universe, and that billions of them stream through the Earth each second.

https://bigthink.com/hard-science/cern-experiment-helps-narrow-the-hunt-for-dark-matter/
Because dark matter doesn't interact, it would have traveled through the detector without interacting. Essentially, you know it's there because you didn't see it.