Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 47: Higgs Physics V
T 47.7: Vortrag
Mittwoch, 18. März 2026, 17:45–18:00, KH 00.014
Estimation of the Background from tt Events with Misidentified Tau Leptons in the Search for Di-Higgs Production in the bbτhadτhad Channel with the ATLAS Detector — •Baktash Amini, Brian Moser, Yingjie Wei, Christian Weiser, Benedict Tobias Winter, and Karl Jakobs — Albert-Ludwigs-Universität Freiburg
Interactions involving multiple Higgs bosons in the final state are yet to be observed. Higgs boson pair production via gluon-gluon fusion or vector-boson fusion involves tri-linear couplings of Higgs bosons providing a unique opportunity to observe the self-coupling at the LHC and to test the Standard Model. Thanks to a good balance of signal yields and signal purity, di-Higgs boson production with one Higgs boson decaying into two b-quarks and the other into two tau leptons is one of the best channels to observe this process. The second-largest background in the HH→bbττ analysis is top pair production, where at least one quark- or gluon-initiated jet is misidentified as a hadronic tau decay. This background is estimated via a data-driven scale-factor method. The talk presents this method for the analysis of the ATLAS Run 2 and partial Run 3 datasets.
Keywords: Di-Higgs production; Final state bbtautau