Academic Commons

Theses Doctoral

Search for a new resonance in the boosted di-Higgs to 4 bottom quarks final state at √s = 8 TeV using the ATLAS detector at the Large Hadron Collider

Zhou, Lei

This thesis presents a search for a new, heavy particle decaying to a pair of Higgs bosons in the 4 bottom quarks final state at √s= 8 TeV using the ATLAS detector at the Large Hadron Collider. The full data collected by ATLAS in 2012 at √s = 8 TeV is used, corresponding to a total luminosity of 19.5 fb -1. A novel technique, using smaller radius track jet to tag bottom quarks in combination with two large radius calorimeter jets to fully reconstruct boosted event topologies, significantly improves the sensitivity up to the mass scale of 2 TeV. In the absence of an excess, upper limits on the production cross section are set with 95% confidence level, using Kaluza-Klein gravitons in the bulk Randall-Sundrum model with coupling c ≡ k √M pl = 1.0 and 2.0 as benchmarks.

Subjects

Files

  • thumnail for Zhou_columbia_0054D_12781.pdf Zhou_columbia_0054D_12781.pdf binary/octet-stream 10.2 MB Download File

More About This Work

Academic Units
Physics
Thesis Advisors
Brooijmans, Gustaaf
Degree
Ph.D., Columbia University
Published Here
May 28, 2015
Academic Commons provides global access to research and scholarship produced at Columbia University, Barnard College, Teachers College, Union Theological Seminary and Jewish Theological Seminary. Academic Commons is managed by the Columbia University Libraries.