pseudorapidity

Related to this is the concept of pseudorapidity.

However, pseudorapidity depends only on the polar angle of its trajectory, and not on the energy of the particle.

Pseudorapidity is odd about degrees.

Experimental particle physics, η stands for pseudorapidity.

The high pseudorapidity region is instrumented by the Hadronic Forward (HF) detector.

In experimental particle physics, pseudorapidity, , is a commonly used spatial coordinate describing the angle of a particle relative to the beam axis.

In particle collider experiments, one often defines the angular position of a particle in terms of an azimuthal angle and pseudorapidity .

Hadron colliders measure physical momenta in terms of transverse momentum , polar angle in the transverse plane and pseudorapidity .

In hadron collider physics, the rapidity (or pseudorapidity) is preferred over the polar angle because, loosely speaking, particle production is constant as a function of rapidity.

The angle between the particle's trajectory and the detector's beam axis (or more precisely the pseudorapidity) and its angle within the perpendicular plane are both measured to within roughly 0.025 radians.

The smaller detectors have larger pseudorapidity coverage, PHOBOS has the largest pseudorapidity coverage of all detectors, and tailored for bulk particle multiplicity measurement, while BRAHMS is designed for momentum spectroscopy, in order to study the so called "small-x" and saturation physics.