MSSM interpretations of the LHC discovery: light or heavy Higgs?

Bechtle, P.; Heinemeyer, S.; Stål, Oscar; Stefaniak, Tim; Weiglein, G.; Zeune, Lisa

doi:10.1140/epjc/s10052-013-2354-5

Cited by 95 publications

(83 citation statements)

References 113 publications

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“…There are many other MSSM parameter choices beyond these scenarios that are also compatible with the observed SM Higgs boson, for instance, refs. [25,26].…”

Section: Introductionmentioning

confidence: 99%

Search for neutral Higgs bosons of the minimal supersymmetric standard model in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector

Aad

Abbott

Abdallah

et al. 2014

J. High Energ. Phys.

Self Cite

131

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A search for the neutral Higgs bosons predicted by the Minimal Supersymmetric Standard Model (MSSM) is reported. The analysis is performed on data from proton-proton collisions at a centre-of-mass energy of 8 TeV collected with the ATLAS detector at the Large Hadron Collider. The samples used for this search were collected in 2012 and correspond to integrated luminosities in the range 19.5-20.3 fb −1 . The MSSM Higgs bosons are searched for in the τ τ final state. No significant excess over the expected background is observed, and exclusion limits are derived for the production cross section times branching fraction of a scalar particle as a function of its mass. The results are also interpreted in the MSSM parameter space for various benchmark scenarios. 6 Systematic uncertainties 17 Results 18 8 Summary 22The ATLAS collaboration 30 IntroductionThe discovery of a scalar particle at the Large Hadron Collider (LHC) [1,2] has provided important insight into the mechanism of electroweak symmetry breaking. Experimental studies of the new particle [3][4][5][6][7] demonstrate consistency with the Standard Model (SM) Higgs boson [8][9][10][11][12][13]. However, it remains possible that the discovered particle is part of an extended scalar sector, a scenario that is favoured by a number of theoretical arguments [14, 15]. The Minimal Supersymmetric Standard Model (MSSM) [16][17][18][19][20] is an extension of the SM, which provides a framework addressing naturalness, gauge coupling unification, and the existence of dark matter. The Higgs sector of the MSSM contains two Higgs doublets, which results in five physical Higgs bosons after electroweak symmetry breaking. Of these bosons, two are neutral and CP-even (h, H), one is neutral and CP-odd (A), 1 and the remaining two are charged (H ± ). At tree level, the mass of the light scalar Higgs boson, m h , is restricted to be smaller than the Z boson mass, m Z . This bound is weakened due to 1 By convention the lighter CP-even Higgs boson is denoted h, the heavier CP-even Higgs boson is denoted H. The masses of the three bosons are denoted in the following as m h , mH and mA for h, H and A, respectively. radiative corrections up to a maximum allowed value of m h ∼ 135 GeV. Only two additional parameters are needed with respect to the SM at tree level to describe the MSSM Higgs sector. These can be chosen to be the mass of the CP-odd Higgs boson, m A , and the ratio of the vacuum expectation values of the two Higgs doublets, tan β. Beyond lowest order, the MSSM Higgs sector depends on additional parameters, which are fixed at specific values in various MSSM benchmark scenarios. For example, in the m max h scenario the radiative corrections are chosen such that m h is maximized for a given tan β and M SUSY [21,22]. -2 - JHEP11(2014)056This paper presents the results of a search for a neutral MSSM Higgs boson in the τ τ decay mode using 19.5-20.3 fb −1 of proton-proton collision data collected with the ATLAS detector [34] in 2012 at a centre-of-mass energy of 8 TeV. Hi...

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“…There are many other MSSM parameter choices beyond these scenarios that are also compatible with the observed SM Higgs boson, for instance, refs. [25,26].…”

Section: Introductionmentioning

confidence: 99%

Search for neutral Higgs bosons of the minimal supersymmetric standard model in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector

Aad

Abbott

Abdallah

et al. 2014

J. High Energ. Phys.

Self Cite

131

View full text Add to dashboard Cite

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“…There has been much previous literature which has explored the Higgs sector in a variety of SUSY scenarios, such as the MSSM [80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99] (also the constrained version [100][101][102][103][104][105][106]), Next-to-MSSM [107][108][109][110][111][112][113][114] and (B-L)SSM [115][116][117][118], including scenarios with light charginos [119], staus [88,120] and stops [88].…”

Section: Atlasmentioning

confidence: 99%

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

Thomas¹

2016

Springer Theses

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In this thesis I study the collider phenomenology of BSM physics at the LHC, concentrating on the Higgs boson and supersymmetery. The implications and effects on cross sections of the loss of unitarity in scattering processes involving multiple vector bosons and/or the Higgs, when the Higgs couplings to the W and the Z are non-SM, is studied using an effective Lagrangian. Subsequently methods to remove unwanted background from transversely polarised vector bosons are explored, which enable an estimation of the potential to measure the Higgs couplings to weak bosons in a model-independent way via vector boson fusion. MSSM effects on Higgs production and decay are also considered, concentrating on the effects due to light stops, sbottoms and staus. Amongst other things, we find that light 3 rd generation squarks generally produce asymmetrical alteration in signal strengths of different production channels, generally causing µ V BF µ ggF > 1. Finally we extend some ATLAS analyses in the low ∆m = mt − mχ0 1 region, extending the excluded masses of light stops. This enables us to limit the maximum effects of light stops on the Higgs, and further limits the parameter space where the light stop scenario of electroweak baryogenesis is viable.

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“…The discovery of a Higgs boson at ATLAS and CMS in July 2012 [1,2] can be interpreted as the discovery of the light CP-even Higgs boson of the MSSM Higgs spectrum [121][122][123]. The experimental average for the (SM) Higgs boson mass is taken to be: [124]…”

Section: The Light Higgs Boson Massmentioning

confidence: 99%

The LHC Higgs Boson Discovery: Updated Implications for Finite Unified Theories and the SUSY Breaking Scale

et al. 2018

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Finite Unified Theories (FUTs) are N = 1 supersymmetric Grand Unified Theories, which can be made finite to all orders in perturbation theory, based on the principle of the reduction of couplings. The latter consists of searching for renormalization group invariant relations among parameters of a renormalizable theory holding to all orders in perturbation theory. FUTs have proven very successful so far. In particular, they predicted the top quark mass one and half years before its experimental discovery, while around five years before the Higgs boson discovery, a particular FUT was predicting the light Higgs boson in the mass range ∼121-126 GeV, in striking agreement with the discovery at LHC. Here, we review the basic properties of the supersymmetric theories and in particular finite theories resulting from the application of the method of reduction of couplings in their dimensionless and dimensionful sectors. Then, we analyze the phenomenologically-favored FUT, based on SU(5). This particular FUT leads to a finiteness constrained version of the Minimal SUSY Standard Model (MSSM), which naturally predicts a relatively heavy spectrum with colored supersymmetric particles above 2.7 TeV, consistent with the non-observation of those particles at the LHC. The electroweak supersymmetric spectrum starts below 1 TeV, and large parts of the allowed spectrum of the lighter might be accessible at CLIC. The FCC-hhwill be able to fully test the predicted spectrum.

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MSSM interpretations of the LHC discovery: light or heavy Higgs?

Cited by 95 publications

References 113 publications

Search for neutral Higgs bosons of the minimal supersymmetric standard model in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector

Search for neutral Higgs bosons of the minimal supersymmetric standard model in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

The LHC Higgs Boson Discovery: Updated Implications for Finite Unified Theories and the SUSY Breaking Scale

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