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[Sphenix-maps-l] ALICE paper on b-tagging with ITS

From: "Perepelitsa, Dennis" <dvp AT bnl.gov>
To: "sphenix-maps-l AT lists.bnl.gov" <sphenix-maps-l AT lists.bnl.gov>, "sphenix-hf-jets-l AT lists.bnl.gov" <sphenix-hf-jets-l AT lists.bnl.gov>
Subject: [Sphenix-maps-l] ALICE paper on b-tagging with ITS
Date: Wed, 20 Oct 2021 21:37:13 +0000

Dear b-jet taggers,

I thought you might be interested to see this recent paper from ALICE: https://arxiv.org/abs/2110.06104 on b-jet tagging with the ITS.

The tagging is performed using the "Track Counting" and the direct Secondary Vertex reconstruction algorithms - which are precisely the two b-tagging algorithms that we have been developing/studying for some years now. This seems like a great opportunity to learn from somebody’s real world experiences with a detector and methods very similar to what we had envisioned.

ALICE achieves tagging efficiencies of ~90% of ~30% for the two methods, respectively, and a purity of something like ~40% for both, with resulting ~10-15%-level uncertainties on the RpA. (Although I’m sure A+A collisions will present additional complications.)

Dennis

Dennis V. Perepelitsa

Assistant Professor, Physics Department

University of Colorado Boulder

[Sphenix-maps-l] ALICE paper on b-tagging with ITS, Perepelitsa, Dennis, 10/20/2021