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Aad, G.; Abbott, B.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Adam Bourdarios, C.; Adamczyk, L.; Addepalli, S. V.; Addison, M. J.; Adelman, J.; Adiguzel, A.; Adye, T.; Affolder, A. A.; Afik, Y.; Agaras, M. N.; Agarwala, J.; Aggarwal, A.; Agheorghiesei, C.; Ahmad, A.; [...]

Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the $$ {\ell}^{+}{\ell}^{-}t\overline{t} $$ and $$ \nu \overline{\nu}b\overline{b} $$ final states using 140 fb−1 of data collected with the ATLAS detector

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  • Media type: E-Article
  • Title: Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the $$ {\ell}^{+}{\ell}^{-}t\overline{t} $$ and $$ \nu \overline{\nu}b\overline{b} $$ final states using 140 fb−1 of data collected with the ATLAS detector
  • Contributor: Aad, G.; Abbott, B.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Adam Bourdarios, C.; Adamczyk, L.; Addepalli, S. V.; Addison, M. J.; Adelman, J.; Adiguzel, A.; Adye, T.; Affolder, A. A.; Afik, Y.; Agaras, M. N.; Agarwala, J.; Aggarwal, A.; Agheorghiesei, C.; Ahmad, A.; [...]
  • Published: Springer Science and Business Media LLC, 2024
  • Published in: Journal of High Energy Physics, 2024 (2024) 2
  • Language: English
  • DOI: 10.1007/jhep02(2024)197
  • ISSN: 1029-8479
  • Keywords: Nuclear and High Energy Physics
  • Origination:
  • Footnote:
  • Description: <jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>A search for a heavy CP-odd Higgs boson, <jats:italic>A</jats:italic>, decaying into a <jats:italic>Z</jats:italic> boson and a heavy CP-even Higgs boson, <jats:italic>H</jats:italic>, is presented. It uses the full LHC Run 2 dataset of <jats:italic>pp</jats:italic> collisions 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:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 13 TeV collected with the ATLAS detector, corresponding to an integrated luminosity of 140 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>. The search for <jats:italic>A</jats:italic> → <jats:italic>ZH</jats:italic> is performed in the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\ell}^{+}{\ell}^{-}t\overline{t} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>ℓ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>ℓ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mi>t</mml:mi> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula> and <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \nu \overline{\nu}b\overline{b} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ν</mml:mi> <mml:mover> <mml:mi>ν</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula> final states and surpasses the reach of previous searches in different final states in the region with <jats:italic>m</jats:italic><jats:sub><jats:italic>H</jats:italic></jats:sub> &gt; 350 GeV and <jats:italic>m</jats:italic><jats:sub><jats:italic>A</jats:italic></jats:sub> &gt; 800 GeV. No significant deviation from the Standard Model expectation is found. Upper limits are placed on the production cross-section times the decay branching ratios. Limits with less model dependence are also presented as functions of the reconstructed <jats:italic>m</jats:italic>(<jats:inline-formula><jats:alternatives><jats:tex-math>$$ t\overline{t} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>t</mml:mi> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula>) and <jats:italic>m</jats:italic>(<jats:inline-formula><jats:alternatives><jats:tex-math>$$ b\overline{b} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula>) distributions in the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {\ell}^{+}{\ell}^{-}t\overline{t} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>ℓ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>ℓ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mi>t</mml:mi> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula> and <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \nu \overline{\nu}b\overline{b} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ν</mml:mi> <mml:mover> <mml:mi>ν</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>b</mml:mi> <mml:mover> <mml:mi>b</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula> channels, respectively. In addition, the results are interpreted in the context of two-Higgs-doublet models.</jats:p>
  • Access State: Open Access