Why is axion dark matter?
In the early universe, the value of the axion field begins to oscillate back and forth. The energy stored in these oscillations is axion dark matter. It is known that dark matter of any kind can only interact very weakly with light, or else it would have been seen by scientists already.
What is an axion particle?
An axion (/ˈæksiɒn/) is a hypothetical elementary particle postulated by the Peccei–Quinn theory in 1977 to resolve the strong CP problem in quantum chromodynamics (QCD). If axions exist and have low mass within a specific range, they are of interest as a possible component of cold dark matter.
Who discovered axions?
The axion is the most popular solution to the strong CP problem. It appeared first in a model proposed by Peccei and Quinn (5). Their idea was to promote ˉθ to a dynamical quantity, rather than simply a constant parameter as in the Standard Model.
Is dark matter made of quarks?
The particle is composed of six quarks — the fundamental particles that usually combine in trios to make up protons and neutrons.
Why are axions cold?
Cold dark matter candidates are non-relativistic, i.e. slow moving particles. axions are non-relativistic and therefore fall within the category of CDM. (CDM). This is a zero momentum condensate and so constitutes cold dark matter.
Are axions WIMPs?
Axions are even trickier than WIMPs. They’re theorized to be extremely light—a millionth of an electronvolt or so, about a trillion times lighter than the already tiny electron—making them next to impossible to produce or study in a traditional particle physics experiment.
How do you detect axion?
The Axion Dark Matter eXperiment (ADMX) at the University of Washington uses a resonant cavity immersed in a superconducting (SC) magnet to detect the weak conversion of axions to microwave photons. Axions or ALPs produced by astrophysical objects could be detected by terrestrial telescopes.
What is darkness made of?
More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light. Any time you block out most of the light – for instance, by cupping your hands together – you get darkness.
Why are axions important?
Physicists have long hypothesized the existence of a minuscule particle called the axion that could single-handedly solve two mysteries. It could account for a puzzling property of quarks, the elementary particles inside protons and neutrons, and it could comprise the dark matter that fills the cosmos.
What is a Strangelet bomb?
lɪt/) is a hypothetical particle consisting of a bound state of roughly equal numbers of up, down, and strange quarks. An equivalent description is that a strangelet is a small fragment of strange matter, small enough to be considered a particle.
What is inside quarks?
The Atom Builder Guide to Elementary Particles Atoms are constructed of two types of elementary particles: electrons and quarks. Electrons occupy a space that surrounds an atom’s nucleus. Each electron has an electrical charge of -1. Quarks make up protons and neutrons, which, in turn, make up an atom’s nucleus.
Is dark matter attractive?
Dark matter has “ordinary” gravitational properties: it attracts other matter, and it attracts itself (i.e., each dark matter particle attracts each other one, as you’d expect). But it’s true that dark matter doesn’t seem to have collapsed into very dense structures — that is, things like stars and planets.
Who is Michael Gutzwiller?
He is the author of the classic monograph on the subject, Chaos in Classical and Quantum Mechanics (1990). Gutzwiller is also known for finding novel solutions to mathematical problems in field theory, wave propagation, crystal physics, and celestial mechanics.
Why choose Butz?
Butz has been consistently ranked among the nation’s Top 400 and Top 100 General Contractors by ENR, McGraw-Hill’s construction industry magazine and is one of the largest, most reputable CM firms headquartered in Pennsylvania.
Why choose Butz construction management?
Butz pioneered the Construction Management concept in the Lehigh Valley in 1973. They provide exceptional, comprehensive construction management services, led by strong values and complete customer satisfaction.
What is Gutzwiller wave function?
Gutzwiller formulated the Gutzwiller approximation for describing electrons with strong local interactions in terms of the Gutzwiller wave function, composed of a simple many-electron wave function acted on by a correlation operator (“Gutzwiller projection”).