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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
by Ömer Oğul Öncel
Submission summary
| Authors (as registered SciPost users): | O. Ogul Oncel |
| Submission information | |
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| Preprint Link: | scipost_202404_00047v1 (pdf) |
| Date submitted: | 2024-04-29 12:17 |
| Submitted by: | Oncel, O. Ogul |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 17th International Workshop on Tau Lepton Physics (TAU2023) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
Three analyses exploiting the $\bm{H\rightarrow\tau\tau}$ process using 139 fb$\bm{^{-1}}$ 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 $\bm{VH}$ production, with $\bm{V(=W, Z)\rightarrow e/\mu}$, 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 $\bm{\tau}$ leptons using an angular observable $\bm{\phi_\tau}$, and measured an observed (expected) value of $\bm{\phi_\tau=9~\pm~16^\circ~(0~\pm~ 28^\circ)}$ at 68\% confidence level. The last analysis is a search for lepton-flavour-violation in $\bm{H\rightarrow e\tau/\mu\tau}$ decays, where most stringent exclusion limits at 95\% confidence level on $\bm{H\rightarrow e\tau}$ branching ratio of 0.2\%, is obtained.
Current status:
Reports on this Submission
Report #1 by Swagato Banerjee (Referee 1) on 2024-11-23 (Invited Report)
Report
Three analyses with Higgs boson decaying into a pair of tau leptons are presented. The first is the analysis of associated production of Higgs boson along with a weak vector boson. The second is a study of the charge conjugation and parity properties of the interaction between the Higgs boson and tau-leptons. The third is search for lepton-flavor violation in Higgs decaying into electron and tau or muon and tau final state.
The scientific quality of the contribution is very high. Minor corrections are requested before publication.
Requested changes
The notation "V(= W, Z) → e/µ decays" in Abstract as well as in Section 2 is confusing. Please write instead "V (= W, Z) -> enu/munu, ee/mumu decays" or something that is more descriptive and un-ambiguous.
Higgs-Strahlung ->Higgs-strahlung [do not capitalize in the middle of a sentence unless referring to a proper noun]
An important challenge in this analysis is the ambiguities
->
The important challenges in this analysis are the ambiguities
selecting and assigning particles
->
selecting and assigning intermediate parent particles
except in the W H(τlepτhad) process, which has individual NN discriminants for each of the ee, eµ and µµ final states.
->
This is confusing. Maybe re-write "each of the ee, eµ and µµ final states" -> "each of the final states containing ee, eµ or µµ decays".
Combined post-fit distribution of all SRs are shown in
->
Combined post-fit distribution from all SRs are shown in
The search aims at measuring the CP properties by exploiting the correlation between the amount of CP-mixing and the transverse-spin correlations of the τ leptons.
-> This sentence should be rephrase to avoid using correlation twice; also, CP is not defined in the paper.
Here is a suggested rephrasing:
This analysis aims at measuring the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and tau-leptons by studying CP-sensitive angular observables.
resolution had the highest impact.
->
resolution has the highest impact.
[don't change from present to past tense with respect to other sentences in the same paragraph]
A search for LFV ... are preformed
->
Searches for LFV ... are performed
Recommendation
Ask for minor revision