Development of boosted jet triggers for Higgs searches at the ATLAS experiment at the LHC/CERN


  • Call:

    FCT / IDPASC call 2011

  • Academic Year:

    2011 / 2012

  • Domain:

    Experimental Particle Physics

  • Supervisor:

    Patricia Conde Muino

  • Co-Supervisor:

    Agostinho Gomes

  • Institution:

    Faculdade de Ciências - Universidade de Lisboa

  • Host Institution:

    Laboratório de Instrumentação e Física Experimental de Partículas

  • Abstract:

    The search for the Higgs boson is the main goal of the LHC experiments. Current fits to the experimental measurements of the Standard Model favor a low mass Higgs, close to the LEP exclusion limit (114GeV). In this mass regime, the dominant decay channel is H->bb. Recent studies have shown that in a boosted regime, where the W/Z and the Higgs have a very large pT, the backgrounds can be reduced and these channels may contribute for a low mass Higgs discovery. However, the current ATLAS jet trigger was not designed to select boosted jets with substructure, having therefore low efficiency. The feasible channels, usually require a high pT lepton for trigger. Some channels, like the pp->ZH->nu nu bb, can benefit clearly from the introduction of a dedicated trigger that selects efficiently boosted objects. Channels like pp->ZH->jet-jet bb, pp->WH->jet-jet bb, can only be possible with such a trigger.

Thesis Student

  • Student:

    Ademar Delgado

  • Status:


  • Started At:

    January 01, 2012

  • Ended At: