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Longitudinal Z-boson polarization and the Higgs boson production cross-section

by Simone Amoroso

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Authors (as registered SciPost users): Simone Amoroso
Submission information
Preprint Link: scipost_202107_00106v1  (pdf)
Date submitted: 2021-07-31 21:41
Submitted by: Amoroso, Simone
Submitted to: SciPost Physics Proceedings
Proceedings issue: 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021)
Ontological classification
Academic field: Physics
  • High-Energy Physics - Phenomenology
Approach: Phenomenological


Lepton pairs are produced copiously in high-energy hadron collisions via electroweak gauge boson exchange, and are one of the most precisely measured final states in proton- proton collisions at the Large Hadron Collider (LHC). We propose that measurements of lepton angular distributions can be used to improve the accuracy of theoretical predic- tions for Higgs boson production cross sections at the LHC. To this end, we exploit the sensitivity of the lepton angular coefficient associated with the longitudinal Z-boson polarization to the parton density function (PDF) for gluons resolved from the incoming protons, in order to constrain the Higgs boson cross section from gluon fusion processes. By a detailed numerical analysis using the open-source platform xFitter, we find that high-statistics determinations of the longitudinally polarized angular coefficient at the LHC Run III and high-luminosity HL-LHC improve the PDF systematics of the Higgs boson cross section predictions by 50 % over a broad range of Higgs boson rapidities.

Current status:
Has been resubmitted

Reports on this Submission

Anonymous Report 1 on 2022-3-4 (Invited Report)

  • Cite as: Anonymous, Report on arXiv:scipost_202107_00106v1, delivered 2022-03-04, doi: 10.21468/SciPost.Report.4629


The manuscript is well-written and is certainly worth publishing.
I have only a minor comment.
Either there is a mistake in the caption of Figures #1/#2 or in the legend of the plots regarding the explanation of colored bands. I believe the mistake has been done in the caption, so;
$\bullet$ on page3, Figure 1: CT18NNLO analysis (red), 300 fb−1 (blue), 3 ab−1 (green) $\rightarrow$ CT18NNLO analysis (blue), 300 fb−1 (magenta), 3 ab−1 (cyan)
$\bullet$ on page4, Figure 2: red band $\rightarrow$ blue band, The blue and green bands $\rightarrow$ The magenta (purple) and cyan bands

  • validity: -
  • significance: -
  • originality: -
  • clarity: -
  • formatting: -
  • grammar: -

Author:  Simone Amoroso  on 2022-03-07  [id 2270]

(in reply to Report 1 on 2022-03-04)

Dear Referee,

Thanks you for the careful reading of the manuscript.
The captions of Figure 1 and 2 were indeed wrong. They have now been corrected following your suggestions.

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