SciPost Submission Page
Top observables as precise probes of the ALP
by Anh Vu Phan
This is not the latest submitted version.
Submission summary
| Authors (as registered SciPost users): | Anh Vu Phan |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2412.06506v1 (pdf) |
| Date submitted: | 2024-12-12 18:36 |
| Submitted by: | Phan, Anh Vu |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | The 17th International Workshop on Top Quark Physics (TOP2024) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Phenomenological |
Abstract
Measurements of the top quark by the ATLAS and CMS experiments go beyond testing the Standard Model (SM) with high precision. Axion-like particles (ALPs), a potential SM extension involving new pseudoscalar particles, exhibit strong interactions with heavy SM fermions. Consequently, they can significantly affect the kinematic distributions of top quarks in top-antitop pair production. Moreover, such strong interactions can induce other ALP couplings at low energies, leading to a rich phenomenology. We summarize recent developments in probing the ALP-top coupling and use LHC data from run 2 to constrain the ALP parameter space.
Current status:
Reports on this Submission
Strengths
1-Well written, clear summary of work presented at the conference
2-The original calculation is an important contribution to the study of ALP phenomenology at colliders
3-Quality of the work is clear as the original article has already been published in a high-impact peer-reviewed journal
Weaknesses
No major weaknesses.
Report
The paper is concise & well written, summarising the original work well and what was presented at the conference (https://indico.cern.ch/event/1368706/contributions/6012425/attachments/2933131/5151719/Top-of-the-ALPs.pdf) . In my opinion, the article meets all of the criteria for a conference proceedings and I recommend its publication. I note a few minor points that could improve the discussion slightly below.
Requested changes
1- page 2, in the discussion after eqn (4), it is remarked that in this basis, the ALP-top coupling is proportional to the top Quark yukawa coupling, justifying the special phenomenological interest in top-ALP couplings by the fact that ithis quantity is large. This is a bit confusing because both bases must be equivalent as the second is obtained from the first by an ALP-dependent chiral transformation. They must therefore give identical physical predictions. Perhaps the discussion could be modified to emphasise that the second basis highlights the fact that top quark ALP interactions may be of special interest. At the moment it reads like the second basis is somehow different.
2- eqn (7), the quantity R(mu, Lambda) is not defined
3- in the presentatioin of the result, the renormalisation and factorisation scale choices should be explicitly stated.
Recommendation
Publish (easily meets expectations and criteria for this Journal; among top 50%)