##\pi \rightarrow \gamma \gamma## spin,C,P

  • Thread starter Thread starter ChrisVer
  • Start date Start date
  • Tags Tags
    Gamma
ChrisVer
Science Advisor
Messages
3,372
Reaction score
465
I was just wondering... Is it possible to explain the J,C,P of the \pi^0, J^{CP}=0^{+-} just from the diphoton decay?
\pi^0 \rightarrow \gamma \gamma

The C is straightforward.
However are the J,P deduced by this interaction alone?
 
Physics news on Phys.org
No, because you can have any spin-even particle decay to two photons.
 

Thread 'Toponium Discovered'

Toponium is a hadron which is the bound state of a valance top quark and a valance antitop quark. Oversimplified presentations often state that top quarks don't form hadrons, because they decay to bottom quarks extremely rapidly after they are created, leaving no time to form a hadron. And, the vast majority of the time, this is true. But, the lifetime of a top quark is only an average lifetime. Sometimes it decays faster and sometimes it decays slower. In the highly improbable case that...
View full post »

Thread 'Dirac-Delta from Normalization of Continuous Eigenfunctions'

I'm following this paper by Kitaev on SL(2,R) representations and I'm having a problem in the normalization of the continuous eigenfunctions (eqs. (67)-(70)), which satisfy \langle f_s | f_{s'} \rangle = \int_{0}^{1} \frac{2}{(1-u)^2} f_s(u)^* f_{s'}(u) \, du. \tag{67} The singular contribution of the integral arises at the endpoint u=1 of the integral, and in the limit u \to 1, the function f_s(u) takes on the form f_s(u) \approx a_s (1-u)^{1/2 + i s} + a_s^* (1-u)^{1/2 - i s}. \tag{70}...
View full post »

Similar threads

I Violation of spin conservation in pion annihilation
Replies
4
Views
2K
A Covariant four-potential in the Dirac equation in QED
Replies
3
Views
2K
I Forbidden decays and conservation laws
Replies
10
Views
3K
A How to find the gamma function for a fermion vacuum energy calculation?
Replies
1
Views
2K
Pion0 Decay: C-Violation and the Search for 3-Photon Decay
Replies
5
Views
2K
I How to find the most likely modes of decay for a particle
Replies
3
Views
2K
\eta\to\pi^0\gamma decay (Why this decay is forbidden by J?)
Replies
4
Views
3K
I Photoproduction of pions off protons
Replies
2
Views
1K
I Calculating 2nd Order Scattering Amplitude: Feynman Diagrams
Replies
6
Views
3K
A Branching ratios | Higgs phenomenology
Replies
13
Views
3K

Hot Threads

Recent Insights

Back
Top