Search for a light charged Higgs boson in $$t \rightarrow H^{\pm } b$$ t → H ± b decays, with $$H^{\pm } \rightarrow cs$$ H ± → c s , in $$pp$$ pp collisions at $$\sqrt{s}={13}\hbox { TeV}$$ s = 13 TeV with the ATLAS detector
Abstract A search for a light charged Higgs boson produced in decays of the top quark, $$t \rightarrow H^{\pm } b$$ t → H ± b with $$H^{\pm } \rightarrow cs$$ H ± → c s , is presented. This search targets the production of top-quark pairs $$t\bar{t} \rightarrow Wb H^{\pm } b$$ t t ¯ → W b H ± b , wi...
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SpringerOpen
2025-02-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13715-4 |
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| author | ATLAS Collaboration |
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| author_sort | ATLAS Collaboration |
| collection | DOAJ |
| description | Abstract A search for a light charged Higgs boson produced in decays of the top quark, $$t \rightarrow H^{\pm } b$$ t → H ± b with $$H^{\pm } \rightarrow cs$$ H ± → c s , is presented. This search targets the production of top-quark pairs $$t\bar{t} \rightarrow Wb H^{\pm } b$$ t t ¯ → W b H ± b , with $$W \rightarrow \ell \nu $$ W → ℓ ν ( $$\ell = e, \mu $$ ℓ = e , μ ), resulting in a lepton-plus-jets final state characterised by an isolated electron or muon and at least four jets. The search exploits b-quark and c-quark identification techniques as well as multivariate methods to suppress the dominant $$t\bar{t}$$ t t ¯ background. The data analysed correspond to $$140\hbox { fb}^{-1}$$ 140 fb - 1 of $$pp$$ pp collisions at $$\sqrt{s} = 13\hbox { TeV}$$ s = 13 TeV recorded with the ATLAS detector at the LHC between 2015 and 2018. Observed (expected) 95% confidence-level upper limits on the branching fraction $$\mathscr {B}(t\rightarrow H^{\pm } b)$$ B ( t → H ± b ) , assuming $$\mathscr {B}(t\rightarrow Wb) + \mathscr {B}(t \rightarrow H^{\pm } (\rightarrow cs)b)=1.0$$ B ( t → W b ) + B ( t → H ± ( → c s ) b ) = 1.0 , are set between 0.066% (0.077%) and 3.6% (2.3%) for a charged Higgs boson with a mass between 60 and 168 GeV. |
| format | Article |
| id | doaj-art-af5dfea3ed034b73b440b0b122711c01 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-af5dfea3ed034b73b440b0b122711c012025-02-09T12:51:53ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-02-0185213410.1140/epjc/s10052-024-13715-4Search for a light charged Higgs boson in $$t \rightarrow H^{\pm } b$$ t → H ± b decays, with $$H^{\pm } \rightarrow cs$$ H ± → c s , in $$pp$$ pp collisions at $$\sqrt{s}={13}\hbox { TeV}$$ s = 13 TeV with the ATLAS detectorATLAS Collaboration0iThemba LabsAbstract A search for a light charged Higgs boson produced in decays of the top quark, $$t \rightarrow H^{\pm } b$$ t → H ± b with $$H^{\pm } \rightarrow cs$$ H ± → c s , is presented. This search targets the production of top-quark pairs $$t\bar{t} \rightarrow Wb H^{\pm } b$$ t t ¯ → W b H ± b , with $$W \rightarrow \ell \nu $$ W → ℓ ν ( $$\ell = e, \mu $$ ℓ = e , μ ), resulting in a lepton-plus-jets final state characterised by an isolated electron or muon and at least four jets. The search exploits b-quark and c-quark identification techniques as well as multivariate methods to suppress the dominant $$t\bar{t}$$ t t ¯ background. The data analysed correspond to $$140\hbox { fb}^{-1}$$ 140 fb - 1 of $$pp$$ pp collisions at $$\sqrt{s} = 13\hbox { TeV}$$ s = 13 TeV recorded with the ATLAS detector at the LHC between 2015 and 2018. Observed (expected) 95% confidence-level upper limits on the branching fraction $$\mathscr {B}(t\rightarrow H^{\pm } b)$$ B ( t → H ± b ) , assuming $$\mathscr {B}(t\rightarrow Wb) + \mathscr {B}(t \rightarrow H^{\pm } (\rightarrow cs)b)=1.0$$ B ( t → W b ) + B ( t → H ± ( → c s ) b ) = 1.0 , are set between 0.066% (0.077%) and 3.6% (2.3%) for a charged Higgs boson with a mass between 60 and 168 GeV.https://doi.org/10.1140/epjc/s10052-024-13715-4 |
| spellingShingle | ATLAS Collaboration Search for a light charged Higgs boson in $$t \rightarrow H^{\pm } b$$ t → H ± b decays, with $$H^{\pm } \rightarrow cs$$ H ± → c s , in $$pp$$ pp collisions at $$\sqrt{s}={13}\hbox { TeV}$$ s = 13 TeV with the ATLAS detector European Physical Journal C: Particles and Fields |
| title | Search for a light charged Higgs boson in $$t \rightarrow H^{\pm } b$$ t → H ± b decays, with $$H^{\pm } \rightarrow cs$$ H ± → c s , in $$pp$$ pp collisions at $$\sqrt{s}={13}\hbox { TeV}$$ s = 13 TeV with the ATLAS detector |
| title_full | Search for a light charged Higgs boson in $$t \rightarrow H^{\pm } b$$ t → H ± b decays, with $$H^{\pm } \rightarrow cs$$ H ± → c s , in $$pp$$ pp collisions at $$\sqrt{s}={13}\hbox { TeV}$$ s = 13 TeV with the ATLAS detector |
| title_fullStr | Search for a light charged Higgs boson in $$t \rightarrow H^{\pm } b$$ t → H ± b decays, with $$H^{\pm } \rightarrow cs$$ H ± → c s , in $$pp$$ pp collisions at $$\sqrt{s}={13}\hbox { TeV}$$ s = 13 TeV with the ATLAS detector |
| title_full_unstemmed | Search for a light charged Higgs boson in $$t \rightarrow H^{\pm } b$$ t → H ± b decays, with $$H^{\pm } \rightarrow cs$$ H ± → c s , in $$pp$$ pp collisions at $$\sqrt{s}={13}\hbox { TeV}$$ s = 13 TeV with the ATLAS detector |
| title_short | Search for a light charged Higgs boson in $$t \rightarrow H^{\pm } b$$ t → H ± b decays, with $$H^{\pm } \rightarrow cs$$ H ± → c s , in $$pp$$ pp collisions at $$\sqrt{s}={13}\hbox { TeV}$$ s = 13 TeV with the ATLAS detector |
| title_sort | search for a light charged higgs boson in t rightarrow h pm b t h b decays with h pm rightarrow cs h c s in pp pp collisions at sqrt s 13 hbox tev s 13 tev with the atlas detector |
| url | https://doi.org/10.1140/epjc/s10052-024-13715-4 |
| work_keys_str_mv | AT atlascollaboration searchforalightchargedhiggsbosonintrightarrowhpmbthbdecayswithhpmrightarrowcshcsinppppcollisionsatsqrts13hboxtevs13tevwiththeatlasdetector |