Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 3: Higgs I
T 3.3: Vortrag
Montag, 19. März 2018, 16:30–16:45, Philo-HS3
Prospects for VBF H→τlepτhad measurements at the High Luminosity LHC with the ATLAS detector — •Tobias Fitschen, Stan Lai, and Michel Janus — II. Physikalisches Institut, Georg-August-Universität Göttingen
Due to its status as the heaviest lepton in the Standard Model, the τ lepton serves as a particularly important probe for the coupling of the Higgs boson to fermions. Despite its larger branching fraction compared with the Higgs discovery channels (H→ ZZ* and H→ γγ), the H→ττ channel evaded observation until recently. This is a consequence of the di-tau signal being harder to separate from background processes.
The proposed High Luminosity upgrade for the LHC promises to deliver a significant improvement in instantaneous and consequently integrated luminosity. This has the advantage of a larger data sample but comes with the drawback of increased pile-up, further complicating the separation of signal and background, particularly in the H→ττ channel.
This talk presents an approach for emulating the expected conditions at the High Luminosity LHC by overlaying pile-up jets and by degrading jet and ETmiss resolution in currently available data. The result of this process can then be used to make a prediction on the sensitivity to the VBF H→τlepτhad decay channel with the ATLAS detector using the predicted High Luminosity LHC dataset.