Tracking performance studies for the Experimental Setup at the Electron-Ion Collider

The US Electron-Ion Collider (EIC) is a future facility to be built at the Brookhaven National Laboratory (BNL) study collisions of polarized electrons with protons and ions. It will provide answers fundamental questions on quark gluon interactions such as: how colored partons colorless jets travel in nuclear medium, properties state matter high density (low-x) regime, distribution quarks, gluons, their spin inside nucleon. EIC expected run luminosity 10 32 -10 34 cm -2 sec -1 center-of-mass energy 20-140 GeV [1]. ATHENA (A Totally Hermetic Electron Nucleus Apparatus) one detector designs provided as response call for proposal issued by Project 2021. consists tracking system wide pseudorapidity coverage (|η|<3.5), granularity (pixel size inner layers ~10 μm), low material budget (0.05% X 0 per layer) innermost silicon achieve good vertexing performances.