Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 8: Higgs Boson: Decay in Fermions 1
T 8.9: Vortrag
Montag, 21. März 2022, 18:15–18:30, T-H21
Sensitivity to lepton flavour violating Higgs boson decays at the HL-Lhc using data-driven background estimation — •Naman Kumar Bhalla, Katharina Schleicher, Valerie Lang, and Markus Schumacher — Albert-Ludwigs-Universität Freiburg
One of the primary goals of the Large Hadron Collider (Lhc) program is to look for processes beyond the Standard Model (SM) of particle physics. One such process predicted by many beyond-SM theories is lepton flavour violation (LFV) in the decays of the Higgs Boson. A search for LFV decays of the Higgs boson with H→ eτµ and H→ µτe final states was performed using the full Run 2 data collected at √s = 13 TeV, corresponding to an integrated luminosity of 138 fb−1. A part of this analysis used a data-driven background estimation, which takes advantage of the idempotency of SM backgrounds under the exchange of an electron and a muon. This symmetry is then broken only by the difference in the two LFV signals considered. Due to its data-driven nature, the sensitivity of this approach is limited by statistical uncertainties, which are expected to reduce with more data.
This talk describes the extrapolation of the Run 2 analysis’ sensitivity to conditions at the high-luminosity Lhc (HL-Lhc), where a data set, collected in pp collisions at √s = 14 TeV corresponding to an integrated luminosity of 3000 fb−1, is expected. The extrapolation also accounts for the expected improvements in systematic uncertainties from detector upgrades planned for the HL-Lhc. The first expected sensitivities for LFV decays of the Higgs boson at the HL-Lhc, based on the data-driven background estimation, are presented.