Is dark matter made of fermions?
The dark matter candidates that naturally tend to have primarily spin- dependent interactions with matter are Majorana fermions and real vector bosons, so that the dark matter particle is its own anti-particle.
Can neutrinos explain dark matter?
We don’t know what dark matter is. Neutrinos are a form of dark matter, because they have mass, and weakly interact with light. But neutrinos have such a small mass and high energy that they move through the universe at nearly the speed of light. For this reason, they are known as hot dark matter.
Are dark matter photons?
Dark photons, if they exist, are thought to be force-carrying particles, similar to the regular photons we interact with every day, which carry the electromagnetic force. But unlike massless photons, these dark-matter particles would have a mass, albeit a very small one.
Is dark matter fermion or boson?
Known elementary particles of matter can be placed in one of two categories: fermions and bosons. So, electrons, quarks, and neutrinos are fermions, while photons and gluons are bosons. Within the standard model of particle physics, there are no bosons that would fit the bill for dark matter.
Is dark matter made of?
Dark matter can refer to any substance which interacts predominantly via gravity with visible matter (e.g., stars and planets). Hence in principle it need not be composed of a new type of fundamental particle but could, at least in part, be made up of standard baryonic matter, such as protons or neutrons.
Is Dark Matter same as anti matter?
Dark matter is considered not to be “regular” matter, of the kind that makes up cats, smartphones, and stars. On the other hand, antimatter, a staple of science fiction, conjures exotic images but is actually regular matter.
Can sterile neutrinos be dark matter?
Sterile neutrinos are introduced to explain the observed neutrino masses. These particles can be of great cosmological and astrophysical significance. ~ keV, it can be the dark matter. Different production mechanisms result in “colder” or “warmer” DM.
Is sterile neutrino dark matter?
Sterile neutrinos as dark matter Naturally, neutrinos and neutrino-like particles are a source of interest in the search for dark matter due to the possession of these two properties. Since the mass of sterile neutrinos is not currently known, the possibility that it is dark matter has not been ruled out.
What is holding the universe together?
Inertia is the force that holds the universe together. Without it, matter would lack the electric forces necessary to form its current arrangement. Inertia is counteracted by the heat and kinetic energy produced by moving particles.