G-parityg-parity and rho decays, g parity
In theoretical physics, G-parity is a multiplicative quantum number that results from the generalization of C-parity to multiplets of particles
C-parity applies only to neutral systems; in the pion triplet, only π0 has C-parity On the other hand, strong interaction does not see electrical charge, so it cannot distinguish amongst π+, π0 and π− We can generalize the C-parity so it applies to all charge states of a given multiplet:G π + π 0 π − = η G π + π 0 π − }\pi ^\\\pi ^\\\pi ^\end}=\eta _\pi ^\\\pi ^\\\pi ^\end}}
where ηG = ±1 are the eigenvalues of G-parity The G-parity operator is defined asG = C e i π I 2 }=}\,e^}}
where C }} is the C-parity operator, and I2 is the operator associated with the 2nd component of the isospin "vector" G-parity is a combination of charge conjugation and a π rad 180° rotation around the 2nd axis of isospin space Given that charge conjugation and isospin are preserved by strong interactions, so is G Weak and electromagnetic interactions, though, are not invariant under G-parity
Since G-parity is applied on a whole multiplet, charge conjugation has to see the multiplet as a neutral entity Thus, only multiplets with an average charge of 0 will be eigenstates of G, that isQ ¯ = B ¯ = Y ¯ = 0 }=}=}=0}
see Q, B, Y
In generalη G = η C − 1 I =\eta _\,-1^}
where ηC is a C-parity eigenvalue, and I is the isospin For fermion-antifermion systems, we haveη G = − 1 S + L + I =-1^\,}
where S is the total spin, L the total orbital angular momentum quantum number For boson–antiboson systems we haveη G = − 1 L + I =-1^\,}
- Quark model
- T D Lee and C N Yang 1956 "Charge conjugation, a new quantum number G, and selection rules concerning a nucleon-antinucleon system" Il Nuovo Cimento 3 4: 749–753 Bibcode:1956NCim3749L doi:101007/BF02744530
- Charles Goebel 1956 "Selection Rules for NN̅ Annihilation" Phys Rev 103 1: 258–261 Bibcode:1956PhRv103258G doi:101103/PhysRev103258
g parity, g-parity and rho decays
G-parity Information about
G-parity viewing the topic.
There are excerpts from wikipedia on this article and video
Our site has a system which serves search engine function.
You can search all data in our system with above button which written "What did you look for? "
Welcome to our simple, stylish and fast search engine system.
We have prepared this method why you can reach most accurate and most up to date knowladge. The search engine that developed for you transmits you to the latest and exact information with its basic and quick system.
You can find nearly everything data which found from internet with this system.