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pion    音标拼音: [p'ɑɪ,ɑn]
n. ｋ介子

ｋ介子

pion
n 1: a meson involved in holding the nucleus together; produced
as the result of high-energy particle collision [synonym:
{pion}, {pi-meson}]

Meson \Mes"on\, n. [NL., fr. Gr. me`son middle, neut. of me`sos,
a., middle.]
1. (Anat.) The mesial plane dividing the body of an animal
into similar right and left halves. The line in which it
meets the dorsal surface has been called the dorsimeson,
and the corresponding ventral edge the ventrimeson. --B.
G. Wilder.
[1913 Webster]

2. (Physics) An elementary particle made up of two quarks; a
hadron having a baryon number of zero; any hadron other
than a baryon. Mesons are bosons with integral values of
spin, having a mass intermediate between those of the
electron and a nucleon; they may have positive or negative
charges, or may be neutral. Mesons are of three types: the
{pion} ([pi]-meson), {kaon} (K-mesons), and
{[eta]-mesons}.
[PJC]

{mu meson} (Physics) the former name for the {muon}, a
particle which is not a true meson[2]. The term is no
longer used in technical literature, except historically.
[PJC]


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  • Pion - Wikipedia
    The pion is one of the particles that mediate the residual strong interaction between a pair of nucleons This interaction is attractive: it pulls the nucleons together Written in a non-relativistic form, it is called the Yukawa potential The pion, being spinless, has kinematics described by the Klein–Gordon equation
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  • PION Definition Meaning - Merriam-Webster
    The meaning of PION is a meson that is a combination of up and down quarks and antiquarks, that may be positive, negative, or neutral, and that has a mass about 270 times that of the electron
  • Pion - Simple English Wikipedia, the free encyclopedia
    A pion, π meson, or pi meson is a type of meson, made of one up quark (u) and one down antiquark (d̅) Mesons are a category of subatomic particles, which are composed of one quark, and one antiquark
  • About | We make brands relevant | Pion
    At Pion, we help brands harness the growth-driving power of consumer groups with full-funnel insights, advertising and verification Our ecosystem of solutions helps expand your brand’s customer base and supercharge sales
  • Physics:Pion - HandWiki
    In particle physics, a pion (or a pi meson, denoted with the Greek letter pi: π) is any of three subatomic particles: π0, 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
  • Pion - Scientific Lib
    In particle physics, pion (short for pi meson) is the collective name for three subatomic particles: π 0, π + and π − Pions are the lightest mesons (excluding the misnamed "Mu Meson" or muon) and play an important role in explaining low-energy properties of the strong nuclear force
  • Pion Explained
    In particle physics, a pion or pi meson, denoted with the Greek letter pi, is any of three subatomic particle s:,, and Each pion consists of a quark and an antiquark and is therefore a meson Pions are the lightest mesons and, more generally, the lightest hadron s
  • The Charged Pions — The Pasayten Institute
    Quarks make up more than big, triplet particles like protons and neutrons Sometimes they come in pairs A pair of up and down down quarks is called a pion There are three kinds of pions: \ (\pi^ {+}\),\ (\pi^ {-}\) and \ (\pi^ {0}\) Compared to the proton, they’re quite small and a little quirky They’re certainly unstable
  • Precise Measurement of Pions Confirms Understanding of Fundamental . . .
    With the new research, the charge-neutral pion’s measured lifetime now matches well with calculations from QCD theory Nuclear physicists from more than 16 collaborating U S and international groups formed the PrimEx collaboration to precisely measure the charge-neutral pion’s lifetime
  • Pion - (College Physics I – Introduction) - Fiveable
    A pion is a type of meson that mediates the strong nuclear force between nucleons Pions come in three varieties: positively charged ($\pi^+$), negatively charged ($\pi^-$), and neutral ($\pi^0$)
  • About Us - We are Pion
    Pion serves drug food researchers, formulators, and manufacturers globally where data quality, accuracy and reproducibility are valued components of a product development process
  • pion | Encyclopedia. com
    pion (pī´ŏn) or pi meson, lightest of the meson family of elementary particles The existence of the pion was predicted in 1935 by Hideki Yukawa, who theorized that it was responsible for the force of the strong interactions holding the atomic nucleus together
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    Pion helps brands to harness the growth-driving power of consumer groups with full-funnel insights, advertising and verification
  • Yet Nobody Put One Here
    Eleven unidentified children sit together side dish combining richness and from everyone which conference you can reproduce by taking classes





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