Theoretical Arguments and Experimental Signals for a Second Resonance of the Higgs Field

Round 1

Reviewer 1 Report

Report of the Referee

Manuscript Ref.: Universe-2114051

Title: "Theoretical arguments and experimental signals for a second resonance
of the Higgs field"

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The authors presented a very nice study on the possibility of a second ressonance of Higgs field. The work is strongly based on Refs. [10-13] by the authors. The main point is the  consideration of a (weak) first-order phase transition. In this case, the  effective potential has two mass scales: the lower mass Higgs (defined by its quadratic shape at the minima), and a larger mass (defined by the zero-point energy). The arguments are carefully presented. The corresponding phenomenology is shown by using the updated LHC data (run 2).

 

The article is well presented and understandable. The results are discussed in clear

and structured form. The work will be quite useful to the researchers in the field. The references are sufficiently updated.

For these reasons, I recommend the manuscript for publication. Suggestions/clarifications are presented in what follows.

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(**) Minor changes/suggestions:

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I have some suggestions in order to improve the text presentation and theoretical arguments.

 - Displayed equation usually are considered to be part of the preceding sentence, that is it will get the very same punctuation as if it was inline math. Therefore, Equations are regarded as being a part of the text, and are punctuated accordingly. Please, check the punctuation of equations in manuscript text.

- How the present study is related to others studies in literature for large mass Higgs-like production at the LHC?  For instance, models using CP-Odd Higgs boson are advocated to be a plausible explanation of the indication of a resonance in the two-photon spectrum at LHC (Phys.Lett.B 757 (2016) 261-267 ). Another exemple is given by a heavy Higgs arising from an additional singlet scalar or arising from an additional electroweak doublet scalar (JHEP 07 (2020) 029).

- Has the model consequences for low energy observables as the electron EDM or the muon anomalous magnetic moment? For example, some CP violating two-Higgs doublet models (JHEP 12 (2019) 068) contain contributions that enhance the electric and magnetic moment of leptons.

 

- Have the authors predictions/analysis for the High-Luminosity LHC (HL-LHC)? The larger dataset at HL-LHC will give the opportunity to reduce the systematic uncertainties (CERN Yellow Rep.Monogr. 7 (2019) 221-584).

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Dear authors, you take a very unusual approach to describe physics measured at the LHC experiments. Without going into detail on the field theoretical foundations, equations of motion for a second resonance, and connection to a description in the framework of perturbation theory, it is very hard to judge the soundness of your methods. For example, in the section that compares with ATLAS data, how were the samples simulated ? Did you validate the cutflow ? Etc. Without giving more specific details here I cannot recommend this for publication.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Please see attached file

Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.pdf