Talk:Missing energy

Some changes may be helpful here

There are a few places where I think this article has potential to be misinterpreted by the reader. I didn't work in particle physics long enough to consider myself an expert, so for the time being I'd like to offer a few notes on the talk page. Maybe an expert can chime in.

>but is output due to the laws of conservation of energy and conservation of momentum.

I think the word "output" is too vague here. Output by what?

>Missing energy is carried by particles that do not interact with the electromagnetic or strong forces and thus are not easily detectable, most notably neutrinos.

Missing energy is also carried by particles that do interact, but are just not absorbed by the detector hardware. For instance, one solution I've seen for the "missing energy" problem at the LHC is to build additional detectors further from the site of the collision.

>The initial momentum of the colliding partons along the beam axis is not known

I don't really think this is relevant for the question of missing energy. The energy of the colliding hadrons is known, even if the partons are constantly trading energy.

>any net momentum in the transverse direction indicates missing transverse energy, also called missing ET or MET.

I think the author means "net momentum" as in some total momentum pointing in one direction, implying that energy was NOT detected in the other direction, but the way this is worded seems a little confusing to me. Missing transverse energy, in general, is the difference between the total amount of energy not detected in the transverse direction(s) and the total energy input into the collision (the energy of the colliding particles). It doesn't necessarily mean that there is a total momentum in a particular direction. Correct me if I'm wrong there; maybe the question of directional momentum is common in collider research and I just don't know about it.

>Accurate measurements of missing energy are difficult, as they require full, accurate, energy reconstruction of all particles produced in an interaction.

I would like some more information about why it's difficult to achieve full, accurate energy reconstruction.

>Mismeasurement of particle energies can make it appear as if there is missing energy carried away by other particles when, in fact, no such particles were created.

Great sentence. No notes. LaserGuidedEditor (talk) 21:29, 17 October 2025 (UTC)