Light Higgs Searches at the Lhc Using Jet Substructure

One of the major goals of the LHC is to discover the Higgs boson, which is the only particle of the Standard Model (SM) that has not been seen yet at colliders. Even if we cannot predict its mass, SM precision electroweak fits seem to favour a low-mass Higgs,2 and LEP data excluded a mass below 114 GeV.3 That’s why we are going to focus on the search for a light Higgs boson at the LHC, assuming its mass is between 115 GeV and 130 GeV. Such a search is very difficult because the dominant decay channel into a bb̄ pair is swamped by backgrounds. To overcome this issue, experiments usually rely on a combination of several search channels including Higgs decay into γγ, ZZ∗, and ττ. Unfortunately, to be efficient discovery channels, they need a large integrated luminosity.4,5 Therefore, maybe would it be interesting to examine Higgs boson production in association with a W or a Z, where the vector boson decays leptonically, and H decays into bb̄? These channels may improve our ability to see a low-mass Higgs boson and they offer an opportunity to measure Higgs couplings with vector bosons and bb̄.