Unraveling the couplings of a Drell-Yan produced Z ' with heavy-flavor tagging
Journal
Physical Review D
Journal Volume
751
Pages
15002
Date Issued
2015
Author(s)
Abstract
Despite the current absence of new-physics signals at the LHC, a Z′ boson with mZ′∼100 GeV could still emerge via Drell-Yan (DY) production, qq.→Z′→μ+μ-, in the next few years. To unravel the nature of the Z′ coupling, we utilize the c- and b-tagging algorithms developed by ATLAS and CMS to investigate cg→cZ′ at the 14 TeV LHC. While light-jet contamination can be eliminated, mistagged b jets cannot be rejected in any of the tagging schemes we adopt. On the other hand, for nonzero bbZ′ coupling, far superior b tagging could discover the bg→bZ′ process, where again light-jet mistagging can be ruled out, but mistagged c jets cannot yet be excluded. Provided that DY production is discovered soon enough, we find that a simultaneous search for cg→cZ′ and bg→bZ′ can conclusively discern the nature of the Z′ couplings involved.
Type
journal article