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Particle Physics Seminars at BNL

Searching for Higgs pair production at the LHC

by Elizabeth Brost (Brookhaven National Laboratory)


    Since the discovery of the Higgs boson at the Large Hadron Collider (LHC) in 2012, particle physicists have been hard at work studying its properties. While some properties of the Higgs boson, such as its mass and spin, have already been measured with great precision at the LHC and agree well with the Standard Model (SM), others remain unconstrained and could be a window into new physics.
    The Higgs self-coupling can be directly measured in collisions resulting in pairs of Higgs bosons, and the measurement of this coupling will give insight into the conditions of the early universe. This is a challenging measurement, due to the incredibly small rate at which pairs of Higgs bosons are produced in the SM. At the same time, a wide range of beyond-the-SM models predict enhancements to the Higgs pair production rate, which motivates searching for this process even now. In this talk, I discuss current searches for Higgs pair production at the LHC, and highlight the latest ATLAS result: a search for Higgs pair production in the HH->yybb channel, which sets the world’s best limits on the HH cross section and on the allowed strength of the Higgs self-coupling.


Meeting ID: 967 0042 2910
Passcode: 078758
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