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Sifting composite from elementary models at FCCee and CePC
by G. Cacciapaglia, A. Deandrea, A. M. Iyer, A. Pinto
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|Authors (as registered SciPost users):||Abhishek Iyer|
|Preprint Link:||https://arxiv.org/abs/2211.00961v1 (pdf)|
|Date submitted:||2022-11-21 09:46|
|Submitted by:||Iyer, Abhishek|
|Submitted to:||SciPost Physics|
New Physics models with either an elementary or composite origin are often associated with a similar imprint in a direct search at colliders, case in point being the production of a light pseudoscalar in association with a monochromatic photon from the decay of a Z boson at future $e+e-$ colliders. We exploit the correlation between the discovery of a signal in the Z decays and electroweak precision measurements as a tool to distinguish a composite model from an elementary scalar one. Our results offer an appealing and rich physics case for future colliders and demonstrate how a lepton collider at the Z mass can be a discovery machine for new physics in the Higgs sector.
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Reports on this Submission
- Cite as: Anonymous, Report on arXiv:2211.00961v1, delivered 2022-12-20, doi: 10.21468/SciPost.Report.6351
The paper discusses the WZW interaction and induced Z boson decays as a probe of compositeness. Unfortunately, I have to say that I find the paper somewhat confusing. The BR in Eq.(4) appears to be a dimensionful quantity, the potential in Eq. (5) is not real (probably lacking "h. c."s somewhere). I can believe that these are typos (or perhaps I'm missing something), however, at this level it is not clear to me if the additional parts are impacted.
The physics that is discussed in the paper is no new and relatively straightforward. Technical complexity is not requirement for good ideas, but I don't see how this work critically adds to a plethora of articles in the literature that already discuss the combination of electroweak precision and exotic decays as a source of electroweak insights, irrespective of whether they are of composite or elementary nature.