Tagging b quarks at extreme energies without tracks

Journal article

We describe a new hit-based b-tagging technique for high energy jets and study its performance with a Geant4-based simulation. The technique uses the fact that at sufficiently high energy a B meson or baryon can live long enough to traverse the inner layers of pixel detectors such as those in the ATLAS, ALICE, or CMS experiments prior to decay. By first defining a 'jet' via the calorimeter, and then counting hits within that jet between pixel layers at increasing radii, we show it is possible to identify jets that contain b quarks by detecting a jump in the number of hits without tracking requirements. We show that the technique maintains fiducial efficiency at TeV scale B hadron energies, far beyond the range of existing algorithms, and improves upon conventional b-taggers.

Authors: Huffman, B; Jackson, C; Tseng, J

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IOP Publishing
• Journal: Journal of Physics G: Nuclear and Particle Physics
• Volume: 43
• Issue: 8
• Article number: 085001
• Publication date: 2016-07-01
• Acceptance date: 2016-06-16
• DOI: 10.1088/0954-3899/43/8/085001
• EISSN: 1361-6471
• ISSN: 0954-3899
• Keywords: bottom baryon tagging; bottom jet tagging; bottom physics experiment; Journal Article; multiplicity jump tagger; b jet tagging