electron-positron pair

electron-positron pair

[i¦lek‚trän ′päz·ə‚trän ‚per]
(physics)
An electron and a positron produced at the same time in the interaction of a photon with a high-intensity electric field.
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He has shown how strong magnetic field is generated during particle acceleration and how it enables cosmic ray acceleration to high energy; initiated the theory of non-local transport for heat flow in inertial confinement fusion; explained the collimation of laser-produced energetic electrons by resistively generated magnetic field; and, with John Kirk, demonstrated the possibility of electron-positron pair production in ultra-high intensity laser-plasma interactions, his citation from the RS says.
While the CMS team looked for the events in which many hadrons and an electron-positron pair were born then scattered with high energies.
The Doppler Broadening Technique measures a broadening of the 511 keV annihilation line due to a Doppler shift caused by the motion of the annihilating electron-positron pair.
For an electron-positron pair production or annihilation amplitude we give a similar definition of locality.
The silicon-strip detectors can distinguish an electron-positron pair produced by a gamma ray from a single cosmic-ray particle.
For example, the electron-positron pair is a type of unmatter.
The experimenters now suppose that some new subatomic particle, electrically neutral with a mass three to four times that of the electron, is produced in these nucleus-nucleus collisions, and it then decays to an electron-positron pair.
Even the most pure and holy of all things in the world, namely the light photon has opposite characteristics of a particle and a wave and also is a composite of two matter --antimatter particles and can be resolved into a pair of the particles such as the electron-positron pair if the photon has enough energy equivalent of the mass of the particle pair.
This can happen under the same weak interaction, provided the neutrino collides with the anti-neutrino to create the electron-positron pair.
Recalling that any sufficiently strong positive potential acting on the vacuum state enables electron-positron pair production to take place in free space (see any relativistic discussion of the Klein Paradox, e.
Then, given the experimental fact of electron-positron pair creation, it is reasonable to conclude that the incident free electron creates such pairs when it "collides" with the stressed portion of the vacuum (z > 0), the positrons (Dirac "holes") proceeding to the right into the vacuum after the collision [8, fig.
The elementary electron-positron pair formation process is considered in terms of a revised quantum electrodynamic theory, with special attention to the conservation of energy, spin, and electric charge.

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