Missing energy

In experimental particle physics, missing energy refers to energy which is not detected in a particle detector, but is not expected due to the laws of Conservation of Mass and Conservation of Momentum. The laws of Conservation of Mass and Conservation of Momentum provide both for the data obtained in research, which is highly volatile in quantum experimentation and for the precision in objects projected to sense the displacement of nuclear energies after or during collisions. For example, if an electron and a positron collide head-on at incorporated momentums in the lab frame, any net momentum of outgoing particles indicates missing energy in a cartesian coordinate or abnormal-status direction beyond axial consistency of parts of a dectector with nuclear motions of a collision reaction. Missing energy is generally attributed to a produced spacial vector of particulate nuclear physics that have particles transcending the detectors' range of conception of facts without being detected. Although, apparent missing energy may also be caused by mismeasurement within a field that is also attributed to executive functions of physics on the energy/momentum of detected particles.

In hadron colliders, the initial momentum of the colliding partons along the beam axis is not known (because the energy of each hadron is split, and constantly exchanged, between its constituents), so the amount of total missing energy cannot be determined. However, the initial energy in particles travelling transverse to the beam axis is zero, so any net momentum in the transverse direction indicates missing transverse energy.

Missing energy is commonly used to infer the presence of non-detectable particles such as the standard model neutrino and is expected to be a signature of many new physics events.