HH and SH Studies at ATLAS in the bbττ state: what mass S is discoverable?

With the discovery of the Higgs boson in July 2012 with a mass of 125 GeV, there was a common drive to pursue what this could mean -- not only for the Standard Model (SM), but for possible exploration beyond the Standard Model (BSM). While so far all the properties of the Higgs are consistent with SM predictions, it's the di-Higgs production that has demonstrated its vitality to deciphering the Higgs' potential. Whether for better understanding electroweak symmetry breaking mechanisms in particle physics, or for clarity on the formation and evolution of the Universe in astrophysics, di-Higgs production could be the key to answering those questions. Along with the search for HH, we are expanding the study to a new scalar boson S. Using Monte Carlo data from ATLAS, we plotted mass histograms for the non-resonant decays of X→S_ττH_bb and X→S_bbH_ττ. As the mass of the S boson gets closer to that of the Higgs boson, it's possible that a new particle or resonance would not be distinguishable. A study was done to see what mass the S boson could be discoverable. Further analysis is in progress to analyze the overlapped histograms through Gaussian or Brett-Wagner fits, which would help determine whether future simulations would need to be modified to accomodate this effect.