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  2. Delta baryon - Wikipedia

    en.wikipedia.org/wiki/Delta_baryon

    The Delta states discussed here are only the lowest-mass quantum excitations of the proton and neutron. At higher spins , additional higher mass Delta states appear, all defined by having constant ⁠ 3 / 2 ⁠ or ⁠ 1 / 2 ⁠ isospin (depending on charge), but with spin ⁠ 3 / 2 ⁠ , ⁠ 5 / 2 ⁠ , ⁠ 7 / 2 ⁠ , ..., ⁠ 11 / 2 ...

  3. Delta ray - Wikipedia

    en.wikipedia.org/wiki/Delta_ray

    A delta ray is characterized by very fast electrons produced in quantity by alpha particles or other fast energetic charged particles knocking orbiting electrons out of atoms. Collectively, these electrons are defined as delta radiation when they have sufficient energy to ionize further atoms through subsequent interactions on their own.

  4. Resonance (particle physics) - Wikipedia

    en.wikipedia.org/wiki/Resonance_(particle_physics)

    In particle physics, a resonance is the peak located around a certain energy found in differential cross sections of scattering experiments.These peaks are associated with subatomic particles, which include a variety of bosons, quarks and hadrons (such as nucleons, delta baryons or upsilon mesons) and their excitations.

  5. Particle physics - Wikipedia

    en.wikipedia.org/wiki/Particle_physics

    Particle physics or high-energy physics is the study of fundamental particles and forces that constitute matter and radiation. The field also studies combinations of elementary particles up to the scale of protons and neutrons , while the study of combination of protons and neutrons is called nuclear physics .

  6. Isospin - Wikipedia

    en.wikipedia.org/wiki/Isospin

    ), a quartet I = ⁠ 3 / 2 ⁠ Delta baryons (Δ ++, Δ +, Δ 0, Δ −), and so on. The power of isospin symmetry and related methods comes from the observation that families of particles with similar masses tend to correspond to the invariant subspaces associated with the irreducible representations of the Lie algebra SU(2). In this context ...

  7. Particle decay - Wikipedia

    en.wikipedia.org/wiki/Particle_decay

    In particle physics, particle decay is the spontaneous process of one unstable subatomic particle transforming into multiple other particles. The particles created in this process (the final state) must each be less massive than the original, although the total mass of the system must be conserved.

  8. List of particles - Wikipedia

    en.wikipedia.org/wiki/List_of_particles

    The field equations of condensed matter physics are remarkably similar to those of high energy particle physics. As a result, much of the theory of particle physics applies to condensed matter physics as well; in particular, there are a selection of field excitations, called quasi-particles , that can be created and explored.

  9. List of equations in nuclear and particle physics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    Quantity (common name/s) (Common) symbol/s Defining equation SI units Dimension Number of atoms N = Number of atoms remaining at time t. N 0 = Initial number of atoms at time t = 0