η : 547.862±0.018 MeV/c2[1] η′ : 957.78±0.06 MeV/c2[1]
Mean lifetime
η : (5.0±0.3)×10−19 s, η′ : (3.2±0.2)×10−21 s
Decays into
η : γ + γ or π0 + π0 + π0 or π+ + π0 + π−
η′ : π+ + π− + η or ( ρ0 + γ ) / ( π+ + π− + γ ) or π0 + π0 + γ
Electric charge
0 e
Spin
0
Isospin
0
Hypercharge
0
Parity
-1
C parity
+1
The eta ( η ) and eta prime meson ( η′ ) are isosinglet mesons made of a mixture of up, down and strange quarks and their antiquarks. The charmed eta meson ( η c) and bottom eta meson ( η b) are similar forms of quarkonium; they have the same spin and parity as the (light) η defined, but are made of charm quarks and bottom quarks respectively. The top quark is too heavy to form a similar meson, due to its very fast decay.
^ abCite error: The named reference PDG14 was invoked but never defined (see the help page).
and 29 Related for: Eta and eta prime mesons information
The eta ( η ) andetaprimemeson ( η′ ) are isosinglet mesons made of a mixture of up, down and strange quarks and their antiquarks. The charmed eta meson...
experiment at SLAC in 2008, and is the lightest particle containing a bottom and anti-bottom quark. Etaandetaprimemesons, a similar particle with light...
the most well studied and understood mesons, the decay properties of the pseudoscalar mesons, particularly of eta (η) andeta-prime (η′), are somewhat contradictory...
between mesonsand baryons is that mesons have integer spin (thus are bosons) while baryons are fermions (half-integer spin). Because mesons are bosons...
and is therefore a meson. Pions are the lightest mesonsand, more generally, the lightest hadrons. They are unstable, with the charged pions π+ and π−...
of classification. These include glueballs and hybrid mesons (mesons bound by excited gluons). Because mesons have an even number of quarks, they are also...
D mesons are the lightest particle containing charm quarks. They are often studied to gain knowledge on the weak interaction. The strange D mesons (Ds)...
pions and omega mesons, the rho meson carries the nuclear force within the atomic nucleus. After the pions and kaons, the rho mesons are the lightest...
Higgs boson) contributes to the phenomenon of mass. Other bosons, such as mesons, are composite particles made up of smaller constituents. Outside the realm...
Bose–Einstein statistics and all have integer spins. Bosons may be either elementary, like photons and gluons, or composite, like mesons. According to the Standard...
proton and neutron (the two nucleons) are by far the best known; and the mesons containing an even number of quarks (almost always 2, one quark and one antiquark)...
mediated by particles known as mesons. The most familiar baryons are protons and neutrons, both of which contain three quarks, and for this reason they are...
particle physics, a kaon (/ˈkeɪ.ɒn/), also called a K mesonand denoted K , is any of a group of four mesons distinguished by a quantum number called strangeness...
known composite particles are scalar bosons, e.g. the alpha particle and scalar mesons. The φ4-theory or quartic interaction is a popular "toy model" quantum...
containing strange quarks include kaons ( K ), strange D mesons ( D s), Sigma baryons ( Σ ), and other strange particles. According to the IUPAP, the symbol...
1.8 and 3.0 MeV/c2. Lattice QCD calculations give a more precise value: 2.01±0.14 MeV/c2. When found in mesons (particles made of one quark and one antiquark)...
quark–antiquark pair. C = (−1)L+S for mesons which have no flavor. Flavored mesons have indefinite value of C. For isospin I = 1 and 0 states, one can define a new...
next few years, several charmed particles, including the D mesonand the charmed strange mesons, were found. In the 21st century, a baryon containing two...
confined in an envelope of gluons that confer vastly greater mass to the mesonsand baryons where quarks occur, so values for quark masses cannot be measured...
between hadrons. The force mediators for these are other hadrons called mesons. Although in the normal phase of QCD single gluons may not travel freely...
vector mesons contrast with the pseudovector mesons, which also have a total spin 1 but instead have even parity. The vector and pseudovector mesons are...
the particle coincide: pairs of photons, Z0 bosons, π0 mesons, and hypothetical gravitons and some hypothetical WIMPs all self-annihilate. However, electrically...
Belle and LHCb experiments. Some of the hadrons containing bottom quarks include: B mesons contain a bottom quark (or its antiparticle) and an up or...
cannot individually exist and must always bind with other quarks. Hadrons can contain either a quark-antiquark pair (mesons) or three quarks (baryons)...
found only within hadrons, which include baryons (such as protons and neutrons) andmesons, or in quark–gluon plasmas. For this reason, much of what is known...
triplets (neutron and proton) holds neutrons and protons together in nuclei, and is due to virtual mesons such as the pi mesonand rho meson. The weak nuclear...
less than the mass of a neutron and 1,836 times the mass of an electron (the proton-to-electron mass ratio). Protons and neutrons, each with masses of approximately...
mesons, andmeson-meson scattering. The light (unflavored) scalar mesons may be divided into three groups: mesons having a mass below 1 GeV/c2 mesons...
of other charged mesons. In the eventual Standard Model of particle physics codified in the 1970s, all mesons other than the mu meson were understood to...
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