Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 101: BSM Higgs 4

T 101.8: Vortrag

Donnerstag, 7. März 2024, 17:45–18:00, Geb. 30.41: HS 3

Double Sliced Event Generation: A novel method for multijet background generation for forward jet sensitive Physics searches — •Gediminas Glemža and Christian Sander — DESY, Notkestr. 85, 22607 Hamburg, Germany

Beyond Standard Model searches with significant reliance on forward jets, such as invisible Higgs decay in vector boson fusion topology, are sensitive to various effects stemming from multijet background events. These forward jets can be faked by pile-up jets. Conventionally generated multijet background events may have a leading jet stemming from pileup interaction resulting in unphysically large event weights. Typical selection cuts can negate these effects to some extent at the cost of aggressively reducing the statistics of multijet samples. Hence, a new method of generating multijet background events enriched in a particular region of interest, called Double Sliced Event Generation, is presented.

The method generates hard scatter and leading pileup interactions in sliced kinematic phase-space, employs full truth jet smearing, considers all possible pile-up tagged jet combinations, and repeatedly samples jet responses and invisible jet energy fractions. The produced backgrounds are enriched in signal regions with correctly calculated physical event weights, hence able to survive the selection cuts and are resistant to the aforementioned negative effects. For the validation of the method, a generated double-sliced event generation multijet background is compared to its conventional MC counterpart for invisible Higgs decay in vector boson fusion topology.

Keywords: Multijet; Background; Generation; Invisible; Higgs