Searching for New Physics Using di-Higgs Final States with the ATLAS Detector– Michael Hank

Tuesday 29 Mar 2022, 12:30 → 13:30 America/Los_Angeles

virtual (SLAC)

Searches for new physics using final states with pairs of Higgs bosons are presented. This state is investigated in two contexts. The first analysis targets pairs of Higgs bosons decaying to $b\overline{b}b\overline{b}$, produced with gravitinos from the decays of supersymmetric higgsinos. The search focuses on theoretically well-motivated higgsinos with masses near the electroweak scale. The second analysis targets pairs of Higgs bosons produced via the trilinear Higgs self-coupling and considers multiple final states, with an emphasis on the $b\overline{b}b\overline{b}$ channel. The searches are performed using up to 139 fb${}^{-1}$ of data in $pp$ collisions at $\sqrt{s}=$13 TeV with the ATLAS detector. The $b\overline{b}b\overline{b}$ backgrounds are dominated by difficult-to-model QCD multijet events and are estimated using novel data-driven approaches utilizing machine-learning techniques.

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SLAC_Interview_v2.pdf

video1270521999.mp4