Discovering the constrained NMSSM with tau leptons at the LHC

Alice Florent; Dirk Zerwas; Ulrich Ellwanger

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Discovering the constrained NMSSM with tau leptons at the LHC

Ulrich Ellwanger, Alice Florent, Dirk Zerwas

High Energy Physics - Phenomenology · Submitted 3 Nov 2010

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim This dedicated analysis allows to improve on the results of generic supersymmetry searches for a large part of the parameter space of the cNMSSM.

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What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.14 · human participants 0.01 · controlled comparison 0.52 · randomized assignment 0.01 · states quantitative result 0.83 · compares with prior results 0.87 · mentions code or data availability 0.02.

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The constrained Next-to-Minimal Supersymmetric Standard Model (cNMSSM) with mSugra-like boundary conditions at the GUT scale implies a singlino-like LSP with a mass just a few GeV below a stau NLSP. Hence, most of the squark/gluino decay cascades contain two tau leptons. The gluino mass >~ 1.2 TeV is somewhat larger than the squark masses of >~ 1 TeV. We simulate signal and background events for such a scenario at the LHC, and propose cuts on the transverse momenta of two jets, the missing transverse energy and the transverse momentum of a hadronically decaying tau lepton. This dedicated analysis allows to improve on the results of generic supersymmetry searches for a large part of the parameter space of the cNMSSM. The distribution of the effective mass and the signal rate provide sensitivity to distinguish the cNMSSM from the constrained Minimal Supersymmetric Standard Model in the stau-coannihilation region.

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What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	The constrained Next-to-Minimal Supersymmetric Standard Model (cNMSSM) with mSugra-like boundary conditions at the GUT scale implies a singlino-like LSP with a mass just a few GeV below a stau NLSP.	background 0.95	0.14	0.09	asserted 0.99
s1	Hence, most of the squark/gluino decay cascades contain two tau leptons.	background 0.43	0.26	0.07	asserted 0.82
s2	The gluino mass >~ 1.2 TeV is somewhat larger than the squark masses of >~ 1 TeV.	result 0.54	0.29	0.04	asserted 0.91
s3	We simulate signal and background events for such a scenario at the LHC, and propose cuts on the transverse momenta of two jets, the missing transverse energy and the transverse momentum of a hadronically decaying tau lepton.	method 0.89	0.93	0.08	asserted 0.99
s4	This dedicated analysis allows to improve on the results of generic supersymmetry searches for a large part of the parameter space of the cNMSSM.	interpretation 0.41	0.78	0.49	asserted 0.95
s5	The distribution of the effective mass and the signal rate provide sensitivity to distinguish the cNMSSM from the constrained Minimal Supersymmetric Standard Model in the stau-coannihilation region.	result 0.51	0.79	0.45	asserted 0.89

What kind of paper the classifier reports this is: simulation study 0.98 · evidence from simulation or computation 1.00.

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The paper

Original abstract

The constrained Next-to-Minimal Supersymmetric Standard Model (cNMSSM) with mSugra-like boundary conditions at the GUT scale implies a singlino-like LSP with a mass just a few GeV below a stau NLSP. Hence, most of the squark/gluino decay cascades contain two tau leptons. The gluino mass >~ 1.2 TeV is somewhat larger than the squark masses of >~ 1 TeV. We simulate signal and background events for such a scenario at the LHC, and propose cuts on the transverse momenta of two jets, the missing transverse energy and the transverse momentum of a hadronically decaying tau lepton. This dedicated analysis allows to improve on the results of generic supersymmetry searches for a large part of the parameter space of the cNMSSM. The distribution of the effective mass and the signal rate provide sensitivity to distinguish the cNMSSM from the constrained Minimal Supersymmetric Standard Model in the stau-coannihilation region.

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References

How the literature uses it

10 arXiv papers cite this in 15 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 8 sentences without a confident label

Cites it as support 1 paper

In the 5-parameter and 4-parameter cNMSSM, the SM-like Higgs cannot get to 125 GeV under all the constraints including muon g-2 [ref] .

The semi-constrained NMSSM in light of muon g-2, LHC, and dark matter constraints · Introduction · 0.96

Cites it as background 6 papers

Since simple models are usually more favoured, the fully constrained NMSSM (cNMSSM) [ref] and the semi-constrained NMSSM (scNMSSM) are also being studied [ref] .

The semi-constrained NMSSM in light of muon g-2, LHC, and dark matter constraints · Introduction · 0.94
While in constrained models, congeneric parameters are assumed universal at the Grand Unified Theoretical (GUT) scale, leaving only four free parameters in the fully-constrained MSSM (CMSSM) and four or five in the fully-constrained NMSSM (CNMSSM) [ref] .

Higgs decay to light scalars in the semi-constrained NMSSM · Introduction · 0.94
In the graceful and simple model of fully-constrained NMSSM (cNMSSM), all Higgs and sfermion masses are assumed to be unified at the Grand Unified theoretical (GUT) scale, thus only four parameters at GUT scale are left free [ref] .

A Novel Scenario in the Semi-constrained NMSSM · Introduction · 0.94

What it cites · 37 sentences without a confident label

Uses the method or tool of 10 papers

Both the signal and the top quark background were generated by PYTHIA 6.4 [ref] , which was in charge of generation and phase-space decays.

PYTHIA 6.4 Physics and Manual · Simulation, signal and background rates · 1.00
For the detector simulation we employed AcerDet [ref] .

AcerDET: a particle level fast simulation and recosntruction package for phenomenological studies on high pT physics at LHC · Simulation, signal and background rates · 1.00
Their total production cross sections are obtained at NLO (QCD) from PROSPINO [ref] , and are also shown in Table [ref].

PROSPINO: A Program for the Production of Supersymmetric Particles in Next-to-leading Order QCD · The signal, backgrounds and cuts · 0.99

Uses data or values from 1 paper

For their transverse momenta we require at least 30 GeV, which allows to assume an efficiency of $∼40%$ [ref] (and a $τ$-fake rate of jets of $∼1-2%$).

Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics · The signal, backgrounds and cuts · 0.94

Compares with 1 paper

Adding the tau identification to the analysis in the 4jtau analysis, a total background cross section of 61 fb after cuts obtained here is to be compared with 51 fb at NLO in [ref] .

Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics · Simulation, signal and background rates · 1.00

Cites as background 19 papers

It is well known that, within the cMSSM [ref] , a small value of $m_0$ would imply a stau ($τ_1$) LSP, which is not a reasonable candidate for the dark matter.

The Soft Supersymmetry-Breaking Lagrangian: Theory and Applications · Introduction · 0.81
The NMSSM with a scale invariant superpotential $W$ [ref] differs from the MSSM through the replacement of the $μ$ term in $W_MSSM$ by the coupling to a gauge singlet superfield $S$ and a trilinear $S$ self-coupling:

The Next-to-Minimal Supersymmetric extension of the Standard Model reviewed · The spectrum of the cNMSSM · 0.99
The NMSSM with a scale invariant superpotential $W$ [ref] differs from the MSSM through the replacement of the $μ$ term in $W_MSSM$ by the coupling to a gauge singlet superfield $S$ and a trilinear $S$ self-coupling:

The Next-to-Minimal Supersymmetric Standard Model · The spectrum of the cNMSSM · 0.99

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