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- 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 ˜χ01 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˜ 0 2), where m( ˜χ01) = 0.5 GeV, are set. Limits at 95% confidence level are also set on the ˜χ ±1 χ˜ 02 cross-section in the mass plane of m( ˜χ ± 1 /χ˜ 0 2) and m( ˜χ01), and on scenarios with gravitino as the lightest supersymmetric particle. Upper limits at the 95% confidence-level are set on the higgsino production crosssection. Higgsino masses below 380 GeV are excluded for the case of the higgsino fully decaying into a Higgs boson and a gravitino.

Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in pp collisions at √s = 13 TeV with the ATLAS detector / Aad, G., Abbott, B., Abbott, D.C., Abed Abud, A., Abeling, K., Abhayasinghe, D.K., Abidi, S.H., Abouzeid, O.S., Abraham, N.L., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B.S., Achkar, B., Adachi, S., Adam, L., Adam Bourdarios, C., Adamczyk, L., Adamek, L., Adelman, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2020:10(2020). [10.1007/JHEP10(2020)005]

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

Artoni, G.;Bagnaia, P.;Betti, A.;Bini, C.;De Cecco, S.;Di Bello, F. A.;Francescato, S.;Gentile, S.;Giagu, S.;Kado, M.;Lacava, F.;Luci, C.;Martinelli, L.;Messina, A.;Policicchio, A.;Vannicola, D.;
2020

Abstract

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- 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 ˜χ01 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˜ 0 2), where m( ˜χ01) = 0.5 GeV, are set. Limits at 95% confidence level are also set on the ˜χ ±1 χ˜ 02 cross-section in the mass plane of m( ˜χ ± 1 /χ˜ 0 2) and m( ˜χ01), and on scenarios with gravitino as the lightest supersymmetric particle. Upper limits at the 95% confidence-level are set on the higgsino production crosssection. Higgsino masses below 380 GeV are excluded for the case of the higgsino fully decaying into a Higgs boson and a gravitino.
2020
particle physics; lhc; supersymmetry
01 Pubblicazione su rivista::01a Articolo in rivista
Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in pp collisions at √s = 13 TeV with the ATLAS detector / Aad, G., Abbott, B., Abbott, D.C., Abed Abud, A., Abeling, K., Abhayasinghe, D.K., Abidi, S.H., Abouzeid, O.S., Abraham, N.L., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B.S., Achkar, B., Adachi, S., Adam, L., Adam Bourdarios, C., Adamczyk, L., Adamek, L., Adelman, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2020:10(2020). [10.1007/JHEP10(2020)005]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1493929
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