How are quarks elementary when they can become leptons?
141632
Is the Higgs boson an elementary particle? If so, why does it decay?
76757
How do photons know they can or can't excite electrons in atoms?
108515
Neutrino flavor and mass eigenstates
12433
How do $\pi^0$ particles exist?
102648
Change of flavour, Weak interaction
108081
Is there some special case where a fermion can mediate a force?
151039
Why are there no elementary charged, spin-zero particles?
111610
Why do electrons, according to my textbook, exist forever?
121961
The magnetic moment of a particle (and a neutrino)
69885
What is an Electron?
13502
What if the LHC doesn't see SUSY?
89724
Where does mass come from in pair production?
87921
Why is the up quark is lighter than the down quark, while top is heavier than bottom?
110266
Quarks in a hadron: where does the mass come from?
16362
How does matter know to obey physical laws?
140005
How will a particle with energy less than $V_{\rm min}$ behave?
111352
Why are muons considered to be elementary particles in the Standard Model?