Why is rho to two pions not allowed?
120567
Why is the decay of a neutral rho meson into two neutral pions forbidden?
137430
Limit that appears in particle physics calculation
155132
Duplicate particle system (not linked)
44573
Can $\pi$ be rational in some base radix
101948
Capacity of an orbital to hold muons and electrons
39646
Is there a relation between $\rho(A) + \rho(B)$ and $\rho(A+B)$, where $\rho$ is the spectral radius?
147410
ArcTan(2) a rational multiple of $\pi$?
122603
How does $\mathcal E(\rho)=\mathrm{Tr}_{env}[U(\rho\otimes\rho_{env})U^\dagger]$ turn into $P_0\rho P_0+P_1\rho P_1$?
66987
Positron-electron annihilation - can more than two photons be created?
29152
Conversion of the Polyakov action into the Nambo-Goto action?
49444
Why isn't $e^{2\pi xi}=1$ true for all $x$?
107450
False proof that $ρe^{iθ} = ρ$ and so complex numbers do not exist?
22040
Why is there no theta-angle (topological term) for the weak interactions?
29857
Why is this not a violation of parity invarance for EM
28350
$\lambda=\frac{2h}{p}$ instead of $\lambda=\frac{h}{p}$?
141951
Floating Point Limitations
2786
The staircase paradox, or why $\pi\ne4$