Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in pp collisions at \sqrts = 13 TeV with the ATLAS detector

Franconi, Laura; Haug, Sigve; Weber, Michele; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Merlassino, Claudia; Miucci, Antonio; Weston, Thomas Daniel (2020). Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in pp collisions at \sqrts = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2020(10) Springer 10.1007/JHEP10(2020)005

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A search for a chargino-neutralino pair decaying via the 125 GeV Higgs boson into photons is presented. The study is based on the data collected between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb−1 of pp collisions at a centre-of-mass energy of 13 TeV. No significant excess over the expected background is observed. Upper limits at 95% confidence level for a massless χ~01 are set on several electroweakino production cross-sections and the visible cross-section for beyond the Standard Model processes. In the context of simplified supersymmetric models, 95% confidence-level limits of up to 310 GeV in m(χ~±1/χ~02), where m(χ~01) = 0.5 GeV, are set. Limits at 95% confidence level are also set on the χ~±1χ~02 cross-section in the mass plane of m(χ~±1/χ~02) and m(χ~01), and on scenarios with gravitino as the lightest supersymmetric particle. Upper limits at the 95% confidence-level are set on the higgsino production cross-section. Higgsino masses below 380 GeV are excluded for the case of the higgsino fully decaying into a Higgs boson and a gravitino.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)
08 Faculty of Science > Physics Institute

UniBE Contributor:

Franconi, Laura; Haug, Sigve; Weber, Michele; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Merlassino, Claudia; Miucci, Antonio and Weston, Thomas Daniel

Subjects:

500 Science > 530 Physics

1029-8479

Springer

English

Submitter:

BORIS Import LHEP

Date Deposited:

21 Apr 2021 14:27

25 Apr 2021 03:07

Publisher DOI:

10.1007/JHEP10(2020)005

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

10.48350/155569

URI:

https://boris.unibe.ch/id/eprint/155569