TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.17.013
TI  - Measurements of Higgs boson properties in decays to two Tau leptons and search for lepton-flavor-violating Higgs boson decays into Tau leptons using the ATLAS detector
PY  - 2025/07/23
UR  - https://scipost.org/SciPostPhysProc.17.013
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 17
SP  - 013
A1  - Öncel, Ö. Ogul
AB  - Three analyses exploiting the $H→\tau\tau$ process using 139 fb$^{-1}$ of proton--proton collision data collected at a center-of-mass energy of 13 TeV by the ATLAS detector at the LHC are presented. A measurement of $VH$ production, with $V(=W, Z)→ e\nu/\mu\nu,ee/\mu\mu$ decays, has established the first evidence for this process with an observed (expected) significance of 4.2 (3.6) standard deviations. The second analysis, first of its kind by the ATLAS collaboration, probes CP-invariance if the decay products of the $\tau$ leptons using an angular observable $\phi_\tau$, and measured an observed (expected) value of $\phi_\tau=9 ± 16^\circ (0 ± 28^\circ)$ at 68% confidence level. The last analysis is a search for lepton-flavour-violation in $H→ e\tau/\mu\tau$ decays, where most stringent exclusion limits at 95% confidence level on $H→ e\tau$ branching ratio of 0.2%, is obtained.
ER  -

@Article{10.21468/SciPostPhysProc.17.013,
	title={{Measurements of Higgs boson properties in decays to two Tau leptons and search for lepton-flavor-violating Higgs boson decays into Tau leptons using the ATLAS detector}},
	author={Ömer Oğul Öncel},
	journal={SciPost Phys. Proc.},
	pages={013},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.17.013},
	url={https://scipost.org/10.21468/SciPostPhysProc.17.013},
}