DEPFET Pixels as a Vertex Detector for the Belle II Experiment

TL;DR

This paper discusses the implementation of DEPFET pixel technology as a vertex detector for the upgraded Belle II experiment at Super KEKB, highlighting its design requirements and current development status.

Contribution

It presents the design considerations and current progress of the DEPFET pixel detector for the Belle II experiment's vertex detection system.

Findings

DEPFET technology meets the high-resolution requirements for Belle II.

The pixel detector is being developed to operate in high-luminosity conditions.

Progress has been made in integrating DEPFET sensors into the Belle II vertex detector.

Abstract

Currently the heavy flavour factory KEKB located at the KEK accelerator centre in Tsukuba, Japan, is being upgraded to the Super KEKB factory, aiming for a substantially higher luminosity of 8x10^35 cm^-2 s^-1. This by a factor of 40 increased luminosity requires significant modifications of the Belle detector. The vertex detector needs to be redesigned and, besides a four-layer silicon strip detector, a pixel detector based on the DEPFET technology will be installed closest to the interaction point. The requirements for this pixel detector, the DEPFET technology and the current status of the pixel detector will be presented in this paper.