SModelS v2.3: Enabling global likelihood analyses

Altakach, Mohammad Mahdi; Kraml, Sabine; Lessa, Andre; Narasimha, Sahana; Pascal, Timothée; Waltenberger, Wolfgang

doi:10.21468/scipostphys.15.5.185

Cited by 9 publications

(9 citation statements)

References 140 publications

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“…In this section, we give an overview of the experimental results in the SMODELS v2.3 [14] database that enter our study. In particular, we explain which material is provided by the experimental collaborations and how it is used in SMODELS.…”

Section: Relevant Analyses In the Databasementioning

confidence: 99%

“…2 → (h χ0 1 )(h χ0 1 ) simplified model on HEPDATA [70], which we implemented in the SMODELS database. Since the reported uncertainties are asymmetric, the SLv2 (Gaussian with a skew) [14,47] approach is used for SR combination. The necessity of going beyond the Gaussian approximation for this analysis was discussed in detail in [71].…”

Section: Cms-sus-16-048 [45]mentioning

confidence: 99%

“…In this paper, we perform a global analysis of LHC constraints for promptly decaying EWinos. To this end, we exploit the SMODELS [10][11][12][13][14] software package and its large database of experimental results from Run 1 and Run 2 of the LHC. SMODELS is a public tool for the fast reinterpretation of LHC searches for new physics on the basis of simplified-model results.…”

Section: Introductionmentioning

confidence: 99%

“…The combination of (approximately) independent analyses in SMODELS through a global likelihood was introduced in a recent paper [14], where we also considered the EW-ino sector as a show-case example. While in [14] only two analyses, one from ATLAS and one from CMS, were combined, we here go a significant step further and dynamically determine the best (i.e., the most sensitive) combination from a set of 16 analyses (11 from ATLAS and 5 from CMS), for which likelihoods for EW-inos can be computed. The procedure relies on the combiner algorithm developed in [15] for the search for possible dispersed signals in the LHC results.…”

Section: Introductionmentioning

confidence: 99%

“…If this is not the case, we refer to the original SMODELS paper [10] and the extensive online manual for a detailed introduction. The calculation of likelihoods in SMODELS is reviewed in [14].…”

Section: Introductionmentioning

confidence: 99%

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Global LHC constraints on electroweak-inos with SModelS v2.3

Altakach,

Kraml,

Lessa

et al. 2024

SciPost Phys.

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Electroweak-inos, superpartners of the electroweak gauge and Higgs bosons, play a special role in supersymmetric theories. Their intricate mixing into chargino and neutralino mass eigenstates leads to a rich phenomenology, which makes it difficult to derive generic limits from LHC data. In this paper, we present a global analysis of LHC constraints for promptly decaying electroweak-inos in the context of the minimal supersymmetric standard model, exploiting the SMODELS software package. Combining up to 16 ATLAS and CMS searches for which electroweak-ino efficiency maps are available in SMODELS, we study which combinations maximise the sensitivity in different regions of the parameter space, how fluctuations in the data in individual analyses influence the global likelihood, and what is the resulting exclusion power of the combination compared to the analysis-by-analysis approach.

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Section: Relevant Analyses In the Databasementioning

confidence: 99%

Section: Cms-sus-16-048 [45]mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Global LHC constraints on electroweak-inos with SModelS v2.3

Altakach,

Kraml,

Lessa

et al. 2024

SciPost Phys.

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Going beyond Top EFT

Lessa,

Sanz

2024

J. High Energ. Phys.

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We present a new way to interpret Top Standard Model measurements going beyond the SMEFT framework. Instead of the usual paradigm in Top EFT, where the main effects come from tails in momenta distributions, we propose an interpretation in terms of new physics which only shows up at loop-level. The effects of these new states, which can be lighter than required within the SMEFT, appear as distinctive structures at high momenta, but may be suppressed at the tails of distributions. As an illustration of this phenomena, we present the explicit case of a UV model with a $$ \mathcal{Z} $$ Z 2 symmetry, including a Dark Matter candidate and a top-partner. This simple UV model reproduces the main features of this class of signatures, particularly a momentum-dependent form factor with more structure than the SMEFT. As the new states can be lighter than in SMEFT, we explore the interplay between the reinterpretation of direct searches for colored states and Dark Matter, and Top measurements, made by ATLAS and CMS in the differential $$ t\overline{t} $$ t t ¯ final state. We also compare our method with what one would expect using the SMEFT reinterpretation, finding that using the full loop information provides a better discriminating power.

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Flavoured Majorana Dark Matter then and now: from freeze-out scenarios to LHC signatures

Acaroğlu,

Blanke,

Heisig

et al. 2024

J. High Energ. Phys.

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We study a simplified Dark Matter model in the Dark Minimal Flavour Violation framework. Our model complements the Standard Model with a flavoured Dark Matter Majorana triplet and a coloured scalar mediator that share a Yukawa coupling with the right-handed up-type quarks with the coupling matrix λ. We extend previous work on this topic by exploring a large range of cosmologically viable parameter space, including the coannihilation region and, in particular, the region of conversion-driven freeze-out, while considering constraints from $$ {D}^0\hbox{--} {\overline{D}}^0 $$ D 0 – D ¯ 0 mixing as well as constraints from direct and indirect Dark Matter searches. We find various realisations of conversion-driven freeze-out within the model, that open up allowed windows of parameter space towards small mass splittings and very weak Dark Matter couplings. Finally, we probe the model by reinterpreting current LHC searches for missing energy and long-lived particles. We point out gaps in the coverage of current constraints as well as new opportunities to search for the model at the LHC, in particular, the charge asymmetry in single-top production associated with jets and missing energy.

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SModelS v2.3: Enabling global likelihood analyses

Cited by 9 publications

References 140 publications

Global LHC constraints on electroweak-inos with SModelS v2.3

Global LHC constraints on electroweak-inos with SModelS v2.3

Going beyond Top EFT

Flavoured Majorana Dark Matter then and now: from freeze-out scenarios to LHC signatures

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