Re: A little matter of anti-matter
what is the anti-matter with you?
Re: A little matter of anti-matter
Southie,
There are two observations which scientists are making, that dont compute well.
The movement of stars within a galaxy, and the movement of galaxies within a cluster of galaxies is because of the gravitational pull of all the matter that exists in that region of space that we are observing. The problem that scientists face again and again is that all the observable matter in any region of the universe is not enough to explain the tug and movement of the stars and galaxies of that region. In fact the observable matter only accounts for a fraction of what is needed to keep that cluster together. The missing matter is dubbed dark matter.
On a flip note, the way universe is expanding, or the space between those clusters of galaxies is increasing is also confusing. For what is visible in the universe, and the calculation based on big bang theory and other theories, universe should be slowing down. Instead it seems to be speeding up. For the lack of better term, the mysterious force that is causing the universe to speed up, is known as dark energy.
Hope the explanation helped
Thanks TLK.
So how is dark matter related to anti matter? Or is it?
Re: A little matter of anti-matter
@TLK … I know they don’t like it, but what if dark energy or expansion of universe can be explained with another a fifth fundamental repulsion force that becomes more significant at cluster level … And inwards at galactic level it is superseded by gravity?
Re: A little matter of anti-matter
Maybe the dark energy (which is responsible for the continuous expansion of the universe) is some form of anti matter. Mind it that we call it energy, only because we don't have any other proper word to describe it.
I don't think so. Matter and antimatter cannot exist alongside each other without annihilating each other. If there is a large concentration of antimatter anywhere in the universe, it would have be far far away from matter. You might detect antimatter around a black hole because of jets of high energy particles or create them in a lab and hold them just long enough before it meets matter and annihilate.
Re: A little matter of anti-matter
Maybe. I like that actually. To me it makes more sense. Antimatter world could be governed by a completely different set of physical laws so why the hell not.
Re: A little matter of anti-matter
The neutron is made up of 1 up and 2 down quarks ... These have charges ... (2/3)e - (1/3)e - (1/3)e = 0
Likewise ... The anti-neutron is made up of anti-quarks ... With charges ..
-(2/3)e + (1/3)e + (1/3)e = 0
neutrons are hadrons which means they are built up with 3 quarks ... Mesons only have two quarks ... And leptons are tiny, they are more fundamental and do not contain quarks - electrons are a type of lepton. For their size they carry a hefty charge.
Matter and anti-matter are distinguished by charge only ... And the various colliders and accelerators only use charge to create the collisions ... Gravitation should be uniformly expressed ... i.e. A neutron star will have a pulling force and so will an anti-neutron star ... But the final collision may be very different between like for like particles to those of like for unlike particle collisions ... The latter being potentially more spectacular.
In fact if we work this through ... Anti-matter will be made up of anti-compounds, which are anti-molecules made from anti-atoms ... So an isolated neutron to anti-neutron collision is highly unlikely. It is more likely to have a positron and electron collision. As leptons usually form the outer surface of a material ... Atomic nuclei are held by other forces in a field preventing them for coming into contact with anything. Electrons in atoms do not collide with their nuclei ... Despite them being oppositely charged ... However, given energy they will collide and interesting things will happen ... Exchange particle formation (bosons) and the proton becomes a neutron ... One of the up quarks with +(2/3)e charge gets converted to a down quark -(1/3)e ... Because the -e charge on the electron delivers that on impact.
Anti-matter is essentially charge opposites, but not gravitational opposites ... i.e. The mass of proton is the same mass as an anti-proton ... And it is the magnitude of the mass that determines the gravitation of that particle. Mass warps space which is the effect of gravity ... And it is only possible to warp space or not warp space for i.e. All deltas are negative ... E.g. There is no possible way travel minus 15 metres away from a point ... Because all directions away from that point are 15 metres from it ... You can only move away from a point ... You can't move more towards a point when you are already on it.
This is what I gather anyway ...
Good explanation. Thank you!
Re: A little matter of anti-matter
Oops! Double post.
Re: A little matter of anti-matter
PiyariCGurya, do you like catwoman more or funguy?
Re: A little matter of anti-matter
That fifth force is the mirror image of Gravity, so basically the same force, just in opposite direction, no?
That is why the expansion of space is not happening inside the clusters, but only in the emptiness of space, so technically, if that empty space is filled with anti-matter which is causing the expansion, then anti-matter could exist in its own pockets of empty space without annihilating with matter, which sits mainly inside the clusters.
But I agree that its a far fetched speculation. Anti-matter would block/reflect the light the same way as matter, so if empty space is filled with it, then we should be able to observe it.
are we doing our quantum trolling again today!?
Re: A little matter of anti-matter
Peace @TLK
It can't be the mirror image of gravity ... because both the repulsion and the attraction are significant when r -> 0 ... Distance between objects ... It means that for mega distances the exertion between the objects will be tending to 0 ...
F -> 0 when r-> infinity ... in GMm/r2
It means we will not experience accelerating universe expansion, but possibly linear expansion only. Because if objects reach that escape velocity they will then follow Newton's 1st law ... Uniform motion or still until acted upon by external force.
I can think of may be two different concepts that might result in universe expansion one with the necessity of a fifth force.
Re: A little matter of anti-matter
One of the theories is that the accelerating expansion is an illusion. But in order to appreciate that illusion we would have to pretend to be 2D organisms. The universe for a 2D organism would be a growing circular planar disc ... How it is noticed that the outer parts stretch away faster ... Now as a 3D being look at the universe of your 2D counterpart and observe his universe not as a planar disc, but as a sauce being poured over a circular ice-cream base ... The shape is actually a sphere and the 2D universe is spreading over it like a layer. Now the parts that are at the very top will move into different planes slowly at first then the parts that are at the edge will move in to subsequent planes faster. If the curvature of the 2D universe gives the impression that the outer parts are moving quickly, but in reality the outer parts are really moving in different planes, similarly we might be experiencing the curvature of space when we interrogate the outer regions. The universe could be wrapped in to itself and what seems to be outer expansion acceleration it could the illusion of that ... It may be how we render in a 3D universe a non-accelerating phenomenon taking place in a higher dimension.
Re: A little matter of anti-matter
Do you guys think the "fifth force" could be Higgs Boson field? It fits the description of Dark matter quite well, heavy but no spin and electric charge.
^ I need to grasp the connection that you are trying to make between higgs field and the fifth force. Unfortunately, it's gonna take some time and many of my brain cells :(
@psyah, as intriguing as the illusion theory sounds, it does not explain (or does it) the reason behind galaxies flying apart from each other, and the farther they are, speedier they would appear to fly away. An illusion, if shifting the wavelength of those galaxies to the blue or red side, must be more than an illusion.
Re: A little matter of anti-matter
Peace TLK
Well it’s not an illusion … It’s a hypothesis that our rendition of curved space means the outer most parts are measured to be moving further away quicker, but in reality are traversing our 3D plane in to others.
Re: A little matter of anti-matter
Do you guys think the "fifth force" could be Higgs Boson field? It fits the description of Dark matter quite well, heavy but no spin and electric charge.
My understand of Higgs was that it gives mass by lots of them gathering towards particles. It does not have anything to do with a repulsion force.
Re: A little matter of anti-matter
^Yes, maybe not a repulsive force but what about negative pressure that could act as a repulsive force? 
Right now, you are putting too much of negative pressure on Psyah
Re: A little matter of anti-matter
Is there a knock out drag out fight going on here?
Sorry - nothing concrete to add.
Re: A little matter of anti-matter
Today we had lentil broccoli carrot soup. High viscosity.
In one bowl, the wife placed grated cheese at the bottom of the bowl and then I poured the soup. In the other bowl, cheese was planning ed after soup was poured.
Bowl A cheese floated
Bowl B cheese at bottom initially.
Was this cheese anti cheese?
Eventually, some of the anti cheese did float to the top I think. No annihilation prior to injestion.
Re: A little matter of anti-matter
TLK, I like you did it!