Extended Data Fig. 2: Beam transverse momentum in the (top) upstream and (bottom) downstream trackers (TKU and TKD).
From: Transverse emittance reduction in muon beams by ionization cooling
Measured x and y components of the beam transverse momentum, px and py, for each absorber configuration (rows) and input emittance (columns). In each histogram, the number of events in each bin is normalized to the number of events contained by the bin with most entries. The beams that pass through an absorber present a smaller transverse momentum in the downstream tracker than the beams that traverse an empty absorber module.
