Performance of the ATLAS track reconstruction algorithms in dense environments in LHC Run 2

M Aaboud, G Aad, B. Abbott, J Abdallah, O Abdinov, B Abeloos, Torsten Åkesson, Simona Bocchetta, Caterina Doglioni, Vincent Hedberg, Göran Jarlskog, Charles Kalderon, Else Lytken, Ulf Mjörnmark, Trine Poulsen, Oxana Smirnova, Oleksandr Viazlo, ALICE Collaboration