One-loop corrections to the two-body decays of the neutral Higgs bosons in the complex NMSSM
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Regular Article - Theoretical Physics
One-loop corrections to the two-body decays of the neutral Higgs bosons in the complex NMSSM Julien Baglio1,2,a , Thi Nhung Dao3,b , Margarete Mühlleitner4,c 1
Institute for Theoretical Physics, Eberhard Karls University Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany Theoretical Physics Department, CERN, 1211 Geneva 23, Switzerland 3 Institute For Interdisciplinary Research in Science and Education, ICISE, Khu Vuc 2, Ghenh Rang, Quy Nhon, Binh Dinh, Vietnam 4 Institute for Theoretical Physics, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany
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Received: 8 July 2020 / Accepted: 3 October 2020 © The Author(s) 2020
Abstract Since no direct signs of new physics have been observed so far indirect searches in the Higgs sector have become increasingly important. With the discovered Higgs boson behaving very standard model (SM)-like, however, indirect new physics manifestations are in general expected to be small. On the theory side, this makes precision predictions for the Higgs parameters and observables indispensable. In this paper, we provide in the framework of the CP-violating next-to-minimal supersymmetric extension of the SM (NMSSM) the complete next-to-leading order (SUSY-)electroweak corrections to the neutral Higgs boson decays that are on-shell and non-loop induced. We also investigate possible gauge-dependence issues in the decays of light Higgs bosons into fermion pairs. Together with the also provided SUSY-QCD corrections to colored final states, the newly calculated SUSY-electroweak corrections are implemented in the Fortran code NMSSMCALC which already includes the state-of-the art QCD corrections. The new code is called NMSSMCALCEW. This way we provide the NMSSM Higgs boson decays and branching ratios at presently highest possible precision and thereby contribute to the endeavor of searching for New Physics at present and future colliders.
1 Introduction The discovery of a scalar particle by the LHC experiments ATLAS [1] and CMS [2] and the subsequent investigation of its properties revealed a Higgs boson that behaves very standard model (SM)-like. Also years after its discovery there are no evidences for new physics from direct searches. In a e-mail:
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this situation the precise investigation of the Higgs sector plays an important role. Indirect effects of physics beyond the SM (BSM) might show up in the properties of the discovered Higgs boson. With a mass of 125.09 GeV [3] it does not exclude the possibility for the Higgs boson of a supersymmetric (SUSY) extension of the SM, like the minimal (MSSM) or the next-to-minimal (NMSSM) ones. Supersymmetry certainly belongs to the best motivated and most intensively studied BSM extensions, and the NMSSM, with a Higgs sector consisting of seven Higgs bosons arising after electroweak symmetry breaking (EWSB) from the two doublet
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