For 10  points, identify these narrow, collimated "sprays" of hadrons that are the experimental signatures of quarks and gluons.
Criteria for a standard definition of these entities was put forth in the Snowmass accord. The most well-known model of  the production of these entities is the Lund string model. Plotting the transverse momentum or energy versus azimuthal  angle and pseudorapidity in lego plots is a common way to visualize them. Two effects that can modify these entities are  pileup and underlying event. Their identification can be complicated by the presence of dark towers. Their detection is  usually done by using arrays of (*) scintillators, which function as calorimeters. The first algorithm for defining them was  devised by Sterman and Weinberg and, unlike the SISCone cone-type algorithm, was not infrared and collinear-safe. For 10  points, identify these narrow, collimated "sprays" of hadrons that are the experimental signatures of quarks and gluons.
Criteria for a standard definition of these entities was put forth in the Snowmass accord.
particle jets