| 释义 |
Definition of baryon in English: baryonnoun ˈbarɪɒnˈbɛriˌɑn Physics A subatomic particle, such as a nucleon or hyperon, that has a mass equal to or greater than that of a proton. Example sentencesExamples - The proton and the neutron are baryons; the electron, the muon, and the neutrino are leptons; whilst the pions are mesons.
- They undergo an enormous Universe-wide phase transformation where all of the quarks and gluons in the Universe become confined together inside mesons such as the pi meson and baryons such as the proton and neutron.
- They're usually found in twos (as particles called mesons) and threes (as particles called baryons, such as protons and neutrons).
- The strong force is mediated by the gluon (which comes in eight flavors), which binds quarks together to form baryons and mesons and protons and neutrons together to form nuclei.
- In particular, we know that the number of baryons (protons and neutrons) exceeds the number of anti-baryons.
Derivatives adjective barɪˈɒnɪk Physics Much of the universe is unknown still, at least to us on Earth, although most of the known baryonic mass is evidently in a simple form. Example sentencesExamples - The baryonic number, which is equivalent to the atomic mass number, has to remain constant for a reaction.
- Astronomers can derive the matter density - that is the sum of the baryonic and dark-matter densities - from the absolute strength of the first peak.
- According to our current understanding, after the big bang most of the normal or baryonic material in the universe consisted of the lightest two elements, hydrogen and helium, with only trace amounts of lithium and beryllium.
- Particle physicists have suggested that other types of particle than baryonic ones might have been produced in the seething cauldron of the early Universe.
Origin 1950s: from Greek barus 'heavy' + -on. Definition of baryon in US English: baryonnounˈbɛriˌɑnˈberēˌän Physics A subatomic particle, such as a nucleon or hyperon, that has a mass equal to or greater than that of a proton. Example sentencesExamples - The proton and the neutron are baryons; the electron, the muon, and the neutrino are leptons; whilst the pions are mesons.
- They're usually found in twos (as particles called mesons) and threes (as particles called baryons, such as protons and neutrons).
- The strong force is mediated by the gluon (which comes in eight flavors), which binds quarks together to form baryons and mesons and protons and neutrons together to form nuclei.
- They undergo an enormous Universe-wide phase transformation where all of the quarks and gluons in the Universe become confined together inside mesons such as the pi meson and baryons such as the proton and neutron.
- In particular, we know that the number of baryons (protons and neutrons) exceeds the number of anti-baryons.
Origin 1950s: from Greek barus ‘heavy’ + -on. |