Antiparticles

Antiparticles were predicted in 1929 by the British physicist Paul Dirac, who managed to unite the theory of quantum mechanics, electromagnetism, and relativity. He received in 1928 quantum relativistic equation of motion of the electron (the Dirac equation) with the need to contain solutions with negative energies. It was further shown that the disappearance of electron with a negative energy is to be interpreted as the occurrence of particles (same mass) with a positive energy and a positive electric charge, i.e. antiparticle with respect to the electron. Dirac found that each subatomic particle must exist "double mirror" with the same mass but opposite electric charge.

Antiparticles were predicted in 1929 by the British physicist Paul Dirac, who managed to unite the theory of quantum mechanics, electromagnetism, and relativity

When the particles and their antiparticles collide, they annihilate each other (annihilate). Then, the electric charges are neutralized, and their masses are converted into clean energy.

Antiparticles of the electron and the proton, astronomers have discovered in cosmic rays coming from outer space. Antiparticle of an electron is called positron. Now also conducted experiments to search for antiparticles of helium in cosmic rays. Physicists were able to get in the lab antiparticle and even entire anti-atoms, such as antihydrogen. Doctors use antiparticles to diagnose and treat cancer.

Some neutral particles are identical to the particles. This, in particular, the photon, the neutral pi meson, eta meson, the Higgs boson, Z-boson, graviton. Such particles are called truly neutral. We emphasize that the electrically neutral particles can not coincide with their antiparticles. This is particularly true for the neutron, neutrino and so on.

Astronomers who have studied the gamma rays, seen the annihilation radiation. When electrons and positrons collide, they are annihilated and thus distinguished gamma rays of known wavelength. It was found that the "signal" rays come from several places in our galaxy, including from a wide area, which is in the direction of the Milky Way's center.

If we talk about the cosmic scale, the question arises: why the universe contains particles in much larger quantities than antiparticles? Currently, experiments are being conducted to find out why this is so. Presumably, as a result of the Big Bang formed the same number of both. But at least we know that for the solution to this problem we have another billion years before the universe (and we along with it) will end its way.

Tools