Data driven search in the displaced $ boverline{b} $ pair channel for a Higgs boson decaying to long-lived neutral particles

摘要

A bstract This article presents a proposal for a new search channel for the Higgs boson decaying to two long-lived neutral particles, each of which decays to $ boverline{b} $ at a displaced vertex. The decay length considered is such that the decay takes place within the LHC beampipe. We present a new data-driven analysis using jet substructure and properties of the tracks from the highly-displaced vertices. We consider a model with a 125?GeV Higgs boson with a significant branching fraction to decay via this mode, with the long-lived neutral particle having a mass in the range of 15-40?GeV and a decay length commensurate with the beam pipe radius. Such a signal can be readily observed with an integrated luminosity of 19.5 fb_(?1)at 8 TeV at the LHC.