SciPost Submission Page
$t\bar{t}t\bar{t}$: NLO QCD corrections in production and decays for the $3\ell$ channel
by Nikolaos Dimitrakopoulos
This is not the latest submitted version.
Submission summary
| Authors (as registered SciPost users): | Nikolaos Dimitrakopoulos |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2412.03984v1 (pdf) |
| Date submitted: | Dec. 8, 2024, 5:23 p.m. |
| Submitted by: | Nikolaos Dimitrakopoulos |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | The 17th International Workshop on Top Quark Physics (TOP2024) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
|
Abstract
We discuss the results for the four-top quark production process at the LHC at NLO accuracy in perturbative QCD for the $3\ell$ decay channel. The QCD corrections are applied in both the production and the decay stages of the four top quarks by employing the narrow-width approximation. The spin correlations are therefore preserved at NLO accuracy in QCD without any approximation. We summarize the impact of higher-order QCD effects by highlighting the sensitivity of the results on the cut applied on the invariant mass of the two hardest light jets in the process.
Current status:
Reports on this Submission
Report
Requested changes
The author notes that the spin correlations, that are implemented using the method described in Ref. [hep-ph/0702198], are accurate at LO. However, Ref. [hep-ph/0702198] claims NLO accuracy "for hard real emissions". I kindly request the author to clarify this apparent discrepancy in the manuscript.
Recommendation
Ask for minor revision
Author: Nikolaos Dimitrakopoulos on 2025-01-27 [id 5152]
(in reply to Report 1 on 2025-01-24)I would like to thank the reviewer for taking the time and the effort to provide this feedback. In my resubmission I have made the following changes in order to clarify the discrepancy mentioned in the report:
In the Introduction, the sentence "As a result, spin correlations were retained at LO accuracy and QCD corrections to the top-quark decays were only described by the parton shower" was changed to "As a result, spin correlations were retained at LO accuracy in the soft and collinear regions and at NLO accuracy only for hard real emissions. Furthermore, QCD corrections to the top-quark decays were only described by the parton shower."
Also, again in the Introduction the sentence "By doing so, the emission of the hard radiation was well described in the top-quark decays and spin correlations were preserved to NLO accuracy" was changed to "By doing so, the emission of the hard radiation was well described in the top-quark decays and spin correlations were preserved to NLO accuracy in the whole phase space without any approximation".
These updates should now address the discrepancy in spin-correlation accuracy between Ref. [hep-ph/0702198] and my work.
Greetings,
Nikolaos Dimitrakopoulos