Tagging b quarks at extreme energies without tracks (English)


In: Journal of Physics G: Nuclear and Particle Physics   ;  43 ,  8  ;  085001  ;  2016
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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.

Table of contents – Volume 43, Issue 8

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Letter of intent for KM3NeT 2.0
S Adrián-Martínez / M Ageron / F Aharonian / S Aiello / A Albert / F Ameli / E Anassontzis / M Andre / G Androulakis / M Anghinolfi et al. | 2016
Shape coexistence at low spin in the Z = 50 region and its spectroscopic signatures
P E Garrett | 2016
Tagging b quarks at extreme energies without tracks
B Todd Huffman / Charles Jackson / Jeff Tseng | 2016
Optical dispersion of composite particles consisting of millicharged constituents
Audrey K Kvam / David C Latimer | 2016
Spin–orbit coupling rule in bound fermion systems
J-P Ebran / E Khan / A Mutschler / D Vretenar | 2016
Fluctuations in charged particle multiplicities in relativistic heavy-ion collisions
Maitreyee Mukherjee / Sumit Basu / Subikash Choudhury / Tapan K Nayak | 2016
Continuum discretised BCS approach for weakly bound nuclei
J A Lay / C E Alonso / L Fortunato / A Vitturi | 2016
Electromagnetic selection rules in the triangular α-cluster model of 12C
G Stellin / L Fortunato / A Vitturi | 2016
Double electron capture searches in 74Se
B Lehnert / T Wester / D Degering / D Sommer / L Wagner / K Zuber | 2016