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    Higgs boson production cross-section measurements and their EFT interpretation in the 4l decay channel at root s=13 TeV with the ATLAS detector

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    Author
    Aaboud, M; Aad, G; Abbott, B; Abdinov, O; Abeloos, B; Abhayasinghe, DK; Abidi, SH; AbouZeid, OS; Abraham, NL; Abramowicz, H; ...
    Date
    2020-10-16
    Source Title
    European Physical Journal C: Particles and Fields
    Publisher
    SPRINGER
    University of Melbourne Author/s
    Urquijo, Phillip; Barberio, Luigia; Taylor, Geoffrey; Ungaro, Francesca Consiglia; Shojaii, Seyed Ruhollah
    Affiliation
    School of Physics
    Metadata
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    Document Type
    Journal Article
    Citations
    Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S., Abraham, N. L., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adiguzel, A., Adye, T. ,... Zwalinski, L. (2020). Higgs boson production cross-section measurements and their EFT interpretation in the 4l decay channel at root s=13 TeV with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 80 (10), https://doi.org/10.1140/epjc/s10052-020-8227-9.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/252242
    DOI
    10.1140/epjc/s10052-020-8227-9
    Abstract
    <jats:title>Abstract</jats:title> <jats:p>Higgs boson properties are studied in the four-lepton decay channel (where lepton = <jats:italic>e</jats:italic>, <jats:inline-formula><jats:alternatives><jats:tex-math>$$\mu $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>μ</mml:mi> </mml:math></jats:alternatives></jats:inline-formula>) using 139 <jats:inline-formula><jats:alternatives><jats:tex-math>$$\hbox {fb}^{-1}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mtext>fb</mml:mtext> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> of proton–proton collision data recorded at <jats:inline-formula><jats:alternatives><jats:tex-math>$$\sqrt{s}=$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>13 TeV by the ATLAS experiment at the Large Hadron Collider. The inclusive cross-section times branching ratio for <jats:inline-formula><jats:alternatives><jats:tex-math>$$H\rightarrow ZZ^*$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>H</mml:mi> <mml:mo>→</mml:mo> <mml:mi>Z</mml:mi> <mml:msup> <mml:mi>Z</mml:mi> <mml:mo>∗</mml:mo> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> decay is measured to be <jats:inline-formula><jats:alternatives><jats:tex-math>$$1.34 \pm 0.12$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>1.34</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.12</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> pb for a Higgs boson with absolute rapidity below 2.5, in good agreement with the Standard Model prediction of <jats:inline-formula><jats:alternatives><jats:tex-math>$$1.33 \pm 0.08$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>1.33</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.08</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> pb. Cross-sections times branching ratio are measured for the main Higgs boson production modes in several exclusive phase-space regions. The measurements are interpreted in terms of coupling modifiers and of the tensor structure of Higgs boson interactions using an effective field theory approach. Exclusion limits are set on the CP-even and CP-odd ‘beyond the Standard Model’ couplings of the Higgs boson to vector bosons, gluons and top quarks.</jats:p>

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