meson

(redirected from Mesons)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Mesons: Leptons, Quarks, Baryons

meson

 [me´zon, mes´on]
1. mesion.
2. any elementary particle having a mass intermediate between the mass of the electron and that of the proton.

me·son

(mez'on, mē'zon),
An elementary particle having a rest mass intermediate in value between the mass of an electron and that of a proton.
[G. neuter of mesos, middle]

meson

/mes·on/ (me´zon) (mes´on)
1. mesion.
2. a subatomic particle having a rest mass intermediate between the mass of the electron and that of the proton, carrying either a positive, negative, or neutral electric charge.

me·son

(mes'on)
An elementary particle having a rest mass intermediate in value between the mass of an electron and that of a proton.
[G. neuter form of mesos, middle]

meson

1. mesion.
2. any elementary particle having a mass intermediate between the mass of the electron and that of the proton.
References in periodicals archive ?
During the past decade physicists around the world have recognized that B mesons provide the best opportunity to study a fundamental difference between matter and antimatter known as CP violation.
The mesons are expected to move unchanged over many successive stars.
5), Skwarnicki and others at the Large Hadron Collider sifted through more than 25,000 meson decays and found overwhelming evidence for a negatively charged particle with a mass of 4,430 million electron volts.
At the same time the strong repulsion of two nucleons at short distances, understood qualitatively in terms of the Fermi statistics of the quarks in the nucleons and the high energy cost of flipping a quark spin in the nucleon, means that the dynamical mechanism for the weak interaction between nucleons must involve meson exchange and the soft QCD physics that leads to it.
c](3900) could be a single entity of four quarks, Skwarnicki says, but it could also be a coupling of two mesons, analogous to two atoms linking up to form a molecule.
Mesons, on the other hand, are made of just two - specifically one quark and one antimatter quark.
Measurements show that there are mesons made of the u, d flavors whose mass is greater than 2000MeV [6].
Theoretical descriptions of the weak nucleon-nucleon interaction are traditionally based on an effective meson exchange model in which the coupling constants for parity violating [pi], [rho], and [omega] meson exchanges set the scale for weak interaction effects and are uncertain to within factors of 2 to 3 on theoretical grounds [1].
But at the recent meeting physicists from two LHC detectors presented Bs meson decay sightings consistent with established particle theory.
Thus, the experimental mass difference (in MeV) of the k, [pi] mesons is [6]
Papers are presented grouped into the main topics of structure function, vector mesons, electroweak and beyond the standard model, hadronic final states, heavy flavors, spin physics, and the future of DIS.
In the meson exchange model of weak nucleon-nucleon (NN) interactions, the exchange of virtual mesons between the nucleons is parameterized by a set of weak meson exchange amplitudes.