High Energy Physics Seminar: Dr. Zack Sullivan, Illinois Institute of Technology.  Add To Calendar

  • Date(s): Monday, 11/23 12:00 PM to Monday, 11/23 1:00 PM
  • Speaker: Dr. Zack Sullivan
  • Host: Ahmed Ismail
  • Campus Address: 2214 SES (Science and Engineering South)

Title: Boosted-bottom jet tagging for Z-prime boson searches (and other physics beyond the standard model)

Abstract: I will discuss a new scheme for tagging TeV-scale b-jets we call “mu_x tagging," and its application to searches for physics beyond the standard model.  At the LHC, the primary method to tag b-jets relies on tracking their charged constituents.  However, when highly boosted, track-based b-tags lose efficiency, and the probability to mistake light jets rises dramatically.  Using muons from B hadron decay and defining a particular combination "x" of angular information and boost estimation, we find fairly flat efficiencies to tag b-jets, c-jets, and light-quark jets of e_b = 14%, e_c = 6.5%, and e_light = 0.1%, respectively up to multi-TeV energies.  I will demonstrate the usefulness of this new scheme by showing the reach for discovery of a leptophobic Z' at the 13 TeV LHC in the dijet channel.

HEP Nov23 flyer