A search is presented for a light charged Higgs boson H+- in top quark pair production (t tbar), where one of the top quarks decays to an H+- and a bottom quark, while the other decays to a W-+ boson and a bottom quark. The H+- is assumed to decay into a charm and a strange quark, whereas the W-+ boson decays into a charged lepton (electron or muon) and a neutrino. Results are reported based on proton-proton collision data at sqrt(s) = 13 TeV, corresponding to an integrated luminosity of 138 fb^-1. The analysis probes H+- masses in the range 40 to 160 GeV using the invariant mass spectrum of the two light jets, where light jets are defined as jets that do not satisfy the bottom quark tagging requirement. The observed yield is found to be consistent with standard model predictions. Upper limits are set on the branching fraction B(t -> H+- b), with values in the range of 0.07-1.12% (0.12-1.20% expected) at 95% confidence level, under the assumption that B(H+- -> cs) = 100%. These are the first direct limits on charged Higgs bosons produced in top quark decays for masses between 40 and 50 GeV, and the most stringent limits to date in the 70-110 GeV range.

Search for light charged Higgs bosons decaying to charm and strange quarks in t tbar events in proton-proton collisions at √s = 13 TeV / Null, N., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Benato, L., Bergauer, T., Dragicevic, M., Hussain, P.S., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Schieck, J., Schöfbeck, R., Shooshtari, M., Sonawane, M., Van Den Bossche, N., Waltenberger, W., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:9(2026 Sep), pp. 1-40. [10.1007/jhep09(2026)182]

Search for light charged Higgs bosons decaying to charm and strange quarks in t tbar events in proton-proton collisions at √s = 13 TeV

Akrap, P.;Basile, C.;Cunqueiro Mendez, L.;De Riggi, F.;Del Re, D.;Del Vecchio, M.;Di Marco, E.;Frosina, L.;Gargiulo, R.;Harikrishnan, B.;Lombardi, F.;Longo, E.;Martikainen, L.;Organtini, G.;Palmeri, N.;Paramatti, R.;Pauletto, T.;Rahatlou, S.;Santanastasio, F.;Vladimirov, V.;
2026

Abstract

A search is presented for a light charged Higgs boson H+- in top quark pair production (t tbar), where one of the top quarks decays to an H+- and a bottom quark, while the other decays to a W-+ boson and a bottom quark. The H+- is assumed to decay into a charm and a strange quark, whereas the W-+ boson decays into a charged lepton (electron or muon) and a neutrino. Results are reported based on proton-proton collision data at sqrt(s) = 13 TeV, corresponding to an integrated luminosity of 138 fb^-1. The analysis probes H+- masses in the range 40 to 160 GeV using the invariant mass spectrum of the two light jets, where light jets are defined as jets that do not satisfy the bottom quark tagging requirement. The observed yield is found to be consistent with standard model predictions. Upper limits are set on the branching fraction B(t -> H+- b), with values in the range of 0.07-1.12% (0.12-1.20% expected) at 95% confidence level, under the assumption that B(H+- -> cs) = 100%. These are the first direct limits on charged Higgs bosons produced in top quark decays for masses between 40 and 50 GeV, and the most stringent limits to date in the 70-110 GeV range.
2026-09
beyond standard model; hadron-hadron scattering; Higgs physics; supersymmetry
01 Pubblicazione su rivista::01a Articolo in rivista
Search for light charged Higgs bosons decaying to charm and strange quarks in t tbar events in proton-proton collisions at √s = 13 TeV / Null, N., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Benato, L., Bergauer, T., Dragicevic, M., Hussain, P.S., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Schieck, J., Schöfbeck, R., Shooshtari, M., Sonawane, M., Van Den Bossche, N., Waltenberger, W., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:9(2026 Sep), pp. 1-40. [10.1007/jhep09(2026)182]
File allegati a questo prodotto
File Dimensione Formato  
Hayrapetyan__Search-for-light_2026.pdf

accesso aperto

Note: Articolo su rivista
Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 1.26 MB
Formato Adobe PDF
1.26 MB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1779877
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact