Physics performance studies for the ALICE inner tracker upgrade

Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus–Nucleus Collisions 2012

Stiller, Johannes^1

Physikalisches Institut, University of Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany^1

关键词: Benchmark analysis;    Inner tracking system;    Interaction region;    Pb-Pb collisions;    Performance study;    Radial distance;    Radiation lengths;    Readout rate;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/446/1/012052/pdf
DOI  :  10.1088/1742-6596/446/1/012052

来源: IOP

【 摘 要 】

During the second long shutdown of the LHC in 2018, the ALICE Collaboration plans to install an upgrade of the ALICE Inner Tracking System (ITS) in the central barrel with seven layers of silicon detectors starting at 2.2 cm radial distance from the interaction region and a material budget as low as 0.3 % radiation length per layer. A single-hit resolution of 4 μm and a readout rate capability of up to 50 kHz in Pb-Pb collisions will allow new and unique measurements in the heavy-quark sector, i.e. charm and beauty. Using detailed Monte Carlo simulations of pp and Pb-Pb collisions we study the performance for heavy-flavor detection with an upgraded ITS in the following benchmark analyses: Charm meson and baryon production, i.e. D0→ K-π+and Λ+c→ pK-p+, and beauty meson and baryon production, i.e. displaced vertices of B+→0π+and Λb→ Λ+cπ-.