Pattern recognition of $^{136}$Xe double beta decay events and background discrimination in a high pressure Xenon TPC

Understand

High pressure gas detectors offer advantages for the detection of rare events, where background reduction is crucial.

• For the neutrinoless double beta decay of 136Xe a high pressure xenon gas Time Projection Chamber (TPC) combines a good energy resolution and a detailed topological information of each event.
• The ionization topology of the double beta decay event of 136Xe in gaseous xenon has a characteristic shape defined by the two straggling electron tracks ending up in two higher ionization charge density blobs.
• With a properly pixelized readout, this topological information is invaluable to perform powerful background discrimination.