Antimatter Definition and 288 Threads

Hi In a Hulk story published in 1979 a rogue KGB agent kidnaps a physicist and forces him to make an antimatter bomb which he plans on using to wipe the USA off the map. The KGB agent activates the bomb, Hulk stands between the two antimatter spheres keeping them from making contact before...

How paul dirac find antimatter equation I guess It came this equation E2=(pc)2+(mc2)2 than we pass E2=(mc2)2 than E=mc2 and -E=mc2 isn't it ?

Hi I am curios about something we know E2=(mc2)2+(pc)2 than Paul Dirac maid E2=(mc2)2 than we know he find antimatter I want to said there's a chance to E=-pc because its logical you can say photon and antiphoton is same but I think there's no reason to say this is false.

I wanted to know If we have a antimatter it decays ? Actually I am asking Is antimatter decay ? Thanks

"The question is very simple: do matter and antimatter obey the same laws of physics?.??

I don't understand why antimatter exists in the first place. Could you explain why and how an asymmetry developed between matter and antimatter?

This article on Majorana particles: http://news.yahoo.com/hunt-source-matter-continues-130052152.html If neutrinos are their own antimatter partners, it could help explain a fundamental mystery of the universe: Why matter exists at all. and If the predictions of the Standard Model —...

Hi, Three questions to forum about something I have been wondering about on antimatter: Can antihydrogen fuse to make antihelium through an antiproton-antiproton chain similar to how protons fuse to make helium in the Sun? If so, like nuclear fusion with matter, does nuclear fusion with...

I am reading Dan Brown's book, 'angels and demons'. It said that anti matter is created by accelerating two ultra thin particle beams in opposite directions around the accelerator tube. When the ultrafast beams collided they created antimatter. This means that matter is created out of nothing...

I read that every particle in the universe has an antimatter form of itself. Does that mean there exists an antimatter form of ourself? If so, where is this antimatter form of ourself? This question might be stupid, but I'm just curioous.

Hello, There is a problem like why universe end up with more matter than anti matter but is it not possible that matter and antimatter does not have enough time to meet and annihilate because of inflationary epoch because of exponential expansion of space time?

So I have been doing research and if antimatter atoms can exist, does that mean every atom now a days has an antimatter counterpart? I know we have discovered anti-hydrogen but anyways I'm trailing off. Could you theoretically create anti-molecules? Obviously realistically at this time...

What is Antimatter -- really? I've been trying to get a grasp of what they ideal of antimatter is exactly. I do understand that it's the 'opposite' of 'matter'. Electronics, Neutrons, Protons, all have an 'opposite', and I've seen where the folks over at CERN have been smashing atoms together...

Can they exist? What happens when an antimatter black hole and a normal black hole collide?

Some sources say, that alcubierre warp drive would have no need for exotic matter but to create a warp bubble around a shuttle-sized spaceship would require only 100-500 kg of antimatter. Still some believe it would not function without exotic matter and some positive energy. The question is: Is...

why does matter release all its energy upon contact with the opposite charge? Hows does charge bind the energy into particles?

I can't go into detail right know - but the thing is: in order to make a real antimatter engine one would need to make a loop of SCs wire r = 70 m, where r(wire) is approx. 20 cm. I need to generate about 10 T in the center of the field, that is 70 m from the nearest wire. How much mechanical...

Hi, As I understand it, if you have a piece of matter (hydrogen) and a piece of antimatter (anti-hydrogen) and they interact with each other they annihilate. What if your matter was Helium and your "antimatter" was anti-hydrogen? or the other way around what if your antimatter was antihelium...

This is a theoretical question since we haven't made enough antimatter to try it in reality of course. But I am asking about the physics part in this. Also, by "useful energy" I mean the energy we are able to use either as a heating source for something like a nuclear reactor, or as energy...

Is it possible to contain a sample of antimatter without it interacting and annihilating with matter? Is there any research going into antimatter at the moment? Is it possible to create antimatter on Earth without using a particle accelerator?

At what level does annihilation occur? For example, if I've got an up quark and an anti-up quark, they can annihilate. If I've got a proton (uud) and anti-proton (anti up, anti up, anti down), they can annihilate. What if I mix a neutron (down, down, up) with an anti-proton (anti up, anti up...

Since this is my first post on this forum, I would like to start by saying: Hello everyone! :smile: Now let's get straight down to business: Over the past few months, I have been doing quite a bit of research in terms of physics, and have had the following questions pop up. I've...

Quick, probably obvious, question. If there was equal amounts of matter and antimatter and they collided and exploded, what happened after the 'battle played out ;)' ? Why is there more matter then antimatter...? Shouldn't there be the same amount?

Couldn't there be an equal amount of matter and antimatter in the universe. While from what I've read there is little antimatter in the universe as we see it. Isn't it a leap to assume that the universe at the Big Bang had slightly more matter than antimatter? Isn't it just as likely that there...

Is there an alternative to making antimatter that would make it more cost efficient? Or is high energy physics the only conceivable possibility? Would someone mind explaining why manufacturing it would "drain the entire global power supply"?

Gravitons are suppose to mediate the gravitational force, but there is also the graviphoton which is the graviton's symmetry partner. The graviphoton causes repulsion between matter and antimatter but this is not confirmed. Can someone explain in layman's terms how this particle could do this?

If virtual particles are popping into and out of existence all the time, why aren'twe? Why aren't the particles that make up everything popping in and out of existence and why is the amount of matter in the universe disproportionate to the amount of antimatter?

I read somewhere that if a particle of antimatter collides with a particle of matter, they annihilate each other. Maybe this is because of what is happening in the 4th dimension(time). Since antimatter is matter traveling backwards in time, maybe the two particles stop in the 4th dimension...

Hi there. Just a few quick questions: What causes a photon to become an antimatter / matter pair? Is it just random? Can a photon be influenced to encourage it to change? Also what is the process called? Do we say the photon has decayed? That doesn't seem right to me. In addition, if...

Can anybody please tell me how to represent a neutral antimatter body such as a planet or a star in the classical formulation of special and general relativities? Thanks.

According to CPT Symmetry matter has reversed charge, spatial coordinates, and time. This includes gravity. So this means that antimatter would attract other antimatter and matter would attract other matter. The difference is when antimatter gets near matter. They repel each other. First, can...

Hello, I am not a physicist but occasionally read some particle physics books because I find it fascinating but I am somehow unsure about some aspects. 1. I read somewhere that antiproton is used to treat cancer. If I may ask, how are they produced and stored because I know that antimatter...

Hi everyone, I'm new to the forums and I don't have the knowledge you guys have about Physics, so my questions will be very simple. Yesterday I was reading a topic about using the antimatter as a weapon, and someone said it is impractical for many reasons, and he stated some, but only one got...

In other words, in terms of science, is there a category that has both antimatter and matter in it?

As much as i have read and understood antimatter can be created artificially when colliding elementary particles at high energy , like two protons in a particle accelerator. Could antimatter be created in a plasma in a nuclear fusion reactor if the plasma temperature /pressure would be high...

Maximum is obviously 42 MT/kg. But how much of the energy is lost as neutrinos from pion and muon decay? Typical nucleon annihilation produces an average of 4,5 pions. Since the energy is 1880 MeV, each pion gets an average of 420 MeV, of which 140 MeV is rest mass. 1/3 of these are...

okay, this might be a very silly question but whatever. If a black hole were composed of antimatter, would we be able to tell? If the black hole were created by anti-matter collapsing and becoming dense enough to turn it into a black hole, then if regular matter fell into it, it wouldn't...

Hello, Last night I rented Angels & Demons and observed a number of physical flaws. I noticed that the explosion following the annihilation of the antimatter in the canister was not as intense as what I had expected, which may not be a flaw as I am merely a novice in the realm of physics...

Are there opportunities for EEs to be involved in research on antimatter engines? Considering antimatter engines are heavily based on magnetic principles, is it feasible to assume that antimatter engine design will be a subfield of EE? The gap between EE and theoretical physics is getting smaller.

Are there any answers to this question? If equal amounts of matter and antimatter were in existence at the big bang surely each annihilation would remove equal amounts of matter and antimatter?

How is antimatter created? I'd like an in-depth answer because it is never really mentioned, the physics behind its creation. All that is ever said is, ''after accelerating particles and colliding them at the LHC...''. Thanks.

I read a book in which it proposed that anti-matter "decayed" faster than matter, right after the big bang, which is why there isn't an around. Unfortunately, I've forgotten exactly what the writer meant, and who it was... Can someone tell me who the writer was, and in what book it was...

Since Particles react with the Higgs Field to gain mass, can't the antiparticles react with it too to gain mass. Thanks Salil

is there evidence to believe that there is an Asymmetry?, for example from the very early universe when there was interaction and annihilation between dark matter and matter

My question is simple: suppose that I have X kg of matter and an equal amount of antimatter, would *both* produce Xc^2 amount of energy upon annihilation, resulting in a total of E=2Xc^2? In other words, would the antimatter 'count'? (So if I take 1 kg of matter and 1 kg of antimatter, I would...

"Antimatter" a misnomer? This is my first post on PF. Hello all. Noting the fact that antimatter has a positive inertial mass and probably an equal, positive gravitational mass, isn't the term a misnomer? I know it has an opposite electrical charge and magnetic moment compared to normal...

This is probably a stupid question...but I'm curious to know whether or not we can 'see' antimatter? In the hypothetical situation where enough antimatter comes together to form something macroscopic/doesn't interact with regular matter and destroy itself, could we see it? Would photons (photons...

If a positron can be seen as an electron moving backwards in time technically, could it be that antimatter was annihilated near the beginning of the universe because it could go no further backwards in time that at the moment of the big bang, leaving only matter going forward in time?

I was wondering about antimatter. Antimatter & matter anihilate when they combine. But how they exist in matter? Why matter anihilate due to the presence of antimatter & matter? Also scientist are thinking about antimatter that where it had gone after big bang but i think that this antimatter...

how all the infinitesimally small sub atomic particles created after Bigbang came across to annihilate with their anti particles in the vastness of universe ? even in accelerators they rely on probability only a few particles collide , so why do people assume all matter particles annihilated and...