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
Three analyses exploiting the H→\tau\tau H → τ τ process using 139 fb ^{-1} − 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 V H production, with V(=W, Z)→ e\nu/\mu\nu,ee/\mu\mu V ( = W , Z ) → e ν...
Saved in:
| Published in | SciPost physics proceedings no. 17; p. 013 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
SciPost
23.07.2025
|
| Online Access | Get full text |
| ISSN | 2666-4003 2666-4003 |
| DOI | 10.21468/SciPostPhysProc.17.013 |
Cover
| Summary: | Three analyses exploiting the H→\tau\tau H → τ τ process using 139 fb ^{-1} − 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 V H production, with V(=W, Z)→ e\nu/\mu\nu,ee/\mu\mu V ( = W , Z ) → e ν / μ ν , e e / μ μ 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 τ leptons using an angular observable \phi_\tau ϕ τ , and measured an observed (expected) value of \phi_\tau=9 ± 16^\circ (0 ± 28^\circ) ϕ τ = 9 ± 16 ∘ ( 0 ± 28 ∘ ) at 68% confidence level. The last analysis is a search for lepton-flavour-violation in H→ e\tau/\mu\tau H → e τ / μ τ decays, where most stringent exclusion limits at 95% confidence level on H→ e\tau H → e τ branching ratio of 0.2%, is obtained. |
|---|---|
| ISSN: | 2666-4003 2666-4003 |
| DOI: | 10.21468/SciPostPhysProc.17.013 |