Tag Info

New answers tagged

0

These to me sound like they're two sides of the same coin. If you lose locality of interaction, then you lose locality of energy conservation, and you therefore have, among other things, combinations of energy transfer which simply push the energy out to $\infty$ instantaneously, creating a pathological global violation. I am not sure that I buy your ...


2

The colour Coulomb interaction is another name for the one-gluon exchange potential between (typically heavy) quarks or other sources having colour. It is a straightforward generalisation of the Abelian (i.e. standard) Coulomb potential stemming from one-photon exchange, $$ V(r) = -\alpha/r \; ,$$ where $r$ is the distance between the sources taken to be ...


1

The rigorously defined form of the interacting fields in $3+1$ dimension is not known (yet), however it will most likely be different from the free field form. There is an a priori result that at one time clarifies and messes up things: the Haag's theorem. Before trying to hint the result and some of the consequences, I would like to point out that, ...


0

Gauge bosons, such as the photon, are indeed the force carriers of fundamental interactions. The interactions are built upon local gauge symmetries of a Lagrangian. A Lagrangian is a list of interactions in our theory. A symmetry is an operation (such as a rotation) that leaves the Lagrangian invariant. Local gauge symmetries are very restrictive. If we ...


7

I think that the only honest answer to this "how" question is (for the electromagnetic interaction -- the strong and weak interactions are analogous) with a mathematical formula: $$\mathcal{L}_\text{int} = e\overline{\psi} \gamma^\mu A_\mu \psi.$$ This is the term that we add to our model to describe the interaction of electrons ($\overline\psi,\psi$) with ...


15

Neutrinos are weakly interacting quantum mechanical point particles, with very small mass. Refraction is a classical mechanics phenomenon, happens to waves traveling in a medium and it is a collective synergy of many photons impinging on the field of the atoms and molecules of the medium. Individual photons are not refracted but are scattered. In synergy ...



Top 50 recent answers are included