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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
  • Pion - Leader in Next-Gen Pharma Development
    We’ll Save You the Work You handle saving lives Pion solutions help reduce risk and uncertainty in drug formulation About Us
  • 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
  • Meet Pion | Pion - We are 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 ( ˈpaɪ ɒn , PIE-on) or 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 - chemeurope. com
    Pion Pion The quark structure of the pion Composition: π + : 1 up, 1 anti-downπ0: 1 down, 1 anti-down or 1 up, 1 anti-upπ − : 1 down, 1 anti-up
  • 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
  • The Charged Pions - The Pasayten Institute
    Occasionally a bunch of pions are created together, and you can see little pion atoms - pionium - where pi plus and pi minus orbit each other for a short time Curiously, the pionium atom typically decays not to π + or π +, but to a pair of π 0 ’s
  • Precise Measurement of Pions Confirms Understanding of Fundamental . . .
    The lifetime of a neutrally charged pion is tied to breaking of chiral symmetry This means physicists can use theory to precisely calculate this lifetime Measurements of this lifetime have been much less precise than calculations from theory





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