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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2020-10-16Source Title
European Physical Journal C: Particles and FieldsPublisher
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School of PhysicsMetadata
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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
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<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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