• In particle physics, particle decay is the spontaneous process of one unstable subatomic particle transforming into multiple other particles. The particles...
    10 KB (1,276 words) - 23:41, 8 June 2025
  • Thumbnail for Beta particle
    beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of...
    14 KB (1,522 words) - 06:37, 4 June 2025
  • Thumbnail for Proton decay
    In particle physics, proton decay is a hypothetical form of particle decay in which the proton decays into lighter subatomic particles, such as a neutral...
    24 KB (2,555 words) - 14:40, 9 June 2025
  • Thumbnail for Alpha particle
    generally produced in the process of alpha decay but may also be produced in different ways. Alpha particles are named after the first letter in the Greek...
    33 KB (4,206 words) - 04:14, 2 June 2025
  • Thumbnail for Higgs boson
    Higgs boson (redirect from Higgs particle)
    electric charge, and no colour charge. It is also very unstable, decaying into other particles almost immediately upon generation. The Higgs field is a scalar...
    243 KB (26,531 words) - 19:31, 9 June 2025
  • Thumbnail for Radioactive decay
    radioactivity:: 142  alpha-decay -> strong interaction, beta-decay -> weak interaction, gamma-decay -> electromagnetism. In alpha decay, a particle containing two...
    95 KB (9,852 words) - 17:21, 23 May 2025
  • Thumbnail for Alpha decay
    Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus). The parent nucleus transforms...
    19 KB (2,555 words) - 04:26, 13 June 2025
  • Thumbnail for Beta decay
    In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which an atomic nucleus emits a beta particle (fast energetic electron or positron)...
    64 KB (7,657 words) - 18:21, 18 May 2025
  • Thumbnail for Tau (particle)
    Flavour (particle physics) Generation (particle physics) Koide formula Lepton Since the tauonic lepton number is conserved in weak decays, a tau neutrino...
    13 KB (1,418 words) - 23:57, 10 June 2025
  • Muon (redirect from Muon decay)
    of its decay products is small, providing few kinetic degrees of freedom for decay. Muon decay almost always produces at least three particles, which...
    46 KB (5,577 words) - 13:22, 28 May 2025
  • Thumbnail for Gamma ray
    Gamma ray (redirect from Gamma decay)
    mostly a result of radioactive decay and secondary radiation from atmospheric interactions with cosmic ray particles. However, there are other rare natural...
    61 KB (7,505 words) - 13:03, 2 June 2025
  • Thumbnail for Subatomic particle
    physics, a subatomic particle is a particle smaller than an atom. According to the Standard Model of particle physics, a subatomic particle can be either a...
    36 KB (3,411 words) - 11:06, 24 May 2025
  • Thumbnail for Particle
    particles are truly punctual. Both elementary (such as muons) and composite particles (such as uranium nuclei), are known to undergo particle decay....
    18 KB (1,643 words) - 15:49, 14 May 2025
  • Thumbnail for Neutrino
    Neutrino (redirect from Ν particle)
    this light neutral particle from Chadwick's heavy neutron. In Fermi's theory of beta decay, Chadwick's large neutral particle could decay to a proton, electron...
    146 KB (14,444 words) - 16:32, 4 June 2025
  • subatomic particles which have no charge; neutron radiation neutrinos mesons muons Mechanisms that produce particle radiation include: alpha decay Auger effect...
    5 KB (616 words) - 10:17, 10 August 2023
  • Thumbnail for Positron emission
    beta particle (β+), the other beta particle being the electron (β−) emitted from the β− decay of a nucleus. An example of positron emission (β+ decay) is...
    9 KB (1,145 words) - 22:57, 7 June 2025
  • Thumbnail for Elementary particle
    In particle physics, an elementary particle or fundamental particle is a subatomic particle that is not composed of other particles. The Standard Model...
    36 KB (3,544 words) - 02:11, 26 May 2025
  • Thumbnail for Lambda baryon
    S. Biswas of the University of Melbourne, as a neutral V particle with a proton as a decay product, thus correctly distinguishing it as a baryon, rather...
    20 KB (1,432 words) - 04:03, 25 July 2024
  • Thumbnail for W and Z bosons
    W and Z bosons (redirect from W particle)
    carrier particle for the electromagnetic force. The W±  bosons are best known for their role in nuclear decay. Consider, for example, the beta decay of cobalt-60...
    38 KB (3,772 words) - 10:25, 4 June 2025
  • and the environment. Alpha decay is characterized by the emission of an alpha particle, a 4He nucleus. The mode of this decay causes the parent nucleus...
    12 KB (1,404 words) - 21:13, 16 June 2024
  • Thumbnail for Weak interaction
    Weak interaction (redirect from Weak decay)
    the mechanism of interaction between subatomic particles that is responsible for the radioactive decay of atoms: The weak interaction participates in...
    43 KB (4,621 words) - 23:16, 25 May 2025
  • alpha particles are mono-energetic (i.e. not emitted with a spectrum of energies, such as beta decay) with energies often distinct to the decay they can...
    9 KB (1,234 words) - 08:08, 24 May 2025
  • Thumbnail for Double beta decay
    known as a Majorana particle. In 1939, Wendell H. Furry proposed that if neutrinos are Majorana particles, then double beta decay can proceed without...
    38 KB (3,818 words) - 01:51, 11 April 2025
  • Thumbnail for Pion
    Pion (redirect from Neutral pion decay)
    decay is a prominent quantity in many sub-fields of particle physics, such as chiral perturbation theory. This rate is parametrized by the pion decay...
    28 KB (2,984 words) - 12:21, 13 May 2025
  • Thumbnail for Standard Model
    corresponding particle of generations prior. Thus, there are three generations of quarks and leptons. As first-generation particles do not decay, they comprise...
    67 KB (7,518 words) - 12:16, 11 June 2025
  • Thumbnail for Hadron
    amounts of time to decay (order of 1034+ years). By way of comparison, free neutrons are the longest-lived unstable particle, and decay with a half-life...
    16 KB (1,844 words) - 00:22, 27 April 2025
  • Thumbnail for Kaon
    Kaon (redirect from K-particle)
    Since the mesons decay through weak interactions, parity is not conserved, and the two decays are actually decays of the same particle, now called the...
    39 KB (3,249 words) - 00:06, 8 June 2025
  • Thumbnail for Neutron
    Neutron (redirect from N particle)
    physics. Neutrons are not elementary particles; each is composed of three quarks. A free neutron spontaneously decays to a proton, an electron, and an antineutrino...
    101 KB (11,249 words) - 09:05, 11 June 2025
  • Thumbnail for J/psi meson
    J/psi meson (redirect from J particle)
    Hadronic decay modes of J/ψ are strongly suppressed because of the OZI rule. This effect strongly increases the lifetime of the particle and thereby...
    17 KB (1,827 words) - 12:26, 13 May 2025
  • Thumbnail for Quark
    Quark (category Elementary particles)
    exist. Particles in higher generations generally have greater mass and less stability, causing them to decay into lower-generation particles by means...
    77 KB (7,559 words) - 20:07, 9 June 2025