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Particles and their antiparticles have equal and opposite charges, so that an uncharged particle also gives rise to an uncharged antiparticle. In many cases, the antiparticle and the particle coincide: pairs of photons, Z 0 bosons, π 0 mesons, and hypothetical gravitons and some hypothetical WIMPs all self-annihilate. However, electrically ...
On 4 July 2012, the discovery of a new particle with a mass between 125 and 127 GeV/c 2 was announced; physicists suspected that it was the Higgs boson. Since then, the particle has been shown to behave, interact, and decay in many of the ways predicted for Higgs particles by the Standard Model, as well as having even parity and zero spin, two ...
Particle with zero mass gap in one direction of space. electron Surface magnon polariton: Coupling between spin waves and electromagnetic waves. magnon, photon Surface phonon: Vibrational modes in a crystal lattice associated with atomic shifts at the surface. Surface plasmon: A coherent excitation of a plasma at the surface of a metal.
In physics, a neutral particle is a particle without an electric charge, such as a neutron. ... [PDG 5] and K 0 [PDG 6] The neutral Delta baryon
In particle physics, a pion (/ ˈ p aɪ. ɒ n /, PIE-on) or pi meson, denoted with the Greek letter pi (π), is any of three subatomic particles: π 0, π +, and π −. Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons and, more generally, the lightest hadrons. They are unstable, with the ...
The graviton is a hypothetical tensor boson proposed to be the carrier of gravitational force in some quantum theories of gravity, but no such theory has been successfully incorporated into the Standard Model, so the Standard Model neither predicts any such particle nor requires it, and no gravitational quantum particle has been indicated by experiment.
Mesons named with the letter "f" are scalar mesons (as opposed to a pseudo-scalar meson), and mesons named with the letter "a" are axial-vector mesons (as opposed to an ordinary vector meson) a.k.a. an isoscalar vector meson, while the letters "b" and "h" refer to axial-vector mesons with positive parity, negative C-parity, and quantum numbers I G of 1 + and 0 − respectively.
Originally discovered and isolated by Dr Henry Pym, the Pym Particles are rare subatomic particles which can alter the size and mass of objects and living beings. Originally, it was believed that the particles could only decrease & increase the size and mass of organic or inorganic matter, though after years of work by Dr Henry Pym and various ...