Tagging b quarks at extreme energies without tracks. (1st July 2016)

• Record Type: Journal Article
• Authors: Huffman, B Todd; Jackson, Charles; Tseng, Jeff
• Is Part Of: Journal of physics. Volume 43:Number 8(2016:Aug.)
• Publication Date: 2016-07-01
• Subjects: multiplicity jump tagger -- bottom jet tagging -- bottom physics experiment -- bottom baryon tagging -- b jet tagging; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/0954-3899/43/8/085001
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: We describe a new hit-based b -tagging technique for high energy jets and study its performance with aGeant4 -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.