A revisit to a compressed supersymmetric spectrum with 125 GeV Higgs

Dutta, Juhi; Konar, Partha; Mondal, Subhadeep; Mukhopadhyaya, Biswarup; Kumar, Santosh

doi:10.1007/jhep01(2016)051

Cited by 22 publications

(20 citation statements)

References 101 publications

(142 reference statements)

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“…The dominant SM background contributions for such a signal can arise from QCD, V + jets, tt+ jets and V V + jets channels, where V = W ± and Z. For collider analysis of this final state we have followed strategy similar to that adopted in, for example [62,63].…”

Section: B Simulation Detailsmentioning

confidence: 99%

Singlet-triplet fermionic dark matter and LHC phenomenology

et al. 2018

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It is well known that for the pure standard model triplet fermionic WIMP-type dark matter (DM), the relic density is satisfied around 2 TeV. For such a heavy mass particle, the production cross-section at 13 TeV run of LHC will be very small. Extending the model further with a singlet fermion and a triplet scalar, DM relic density can be satisfied for even much lower masses. The lower mass DM can be copiously produced at LHC and hence the model can be tested at collider. For the present model we have studied the multi jet (≥ 2 j) + missing energy ( E T ) signal and show that this can be detected in the near future of the LHC 13 TeV run. We also predict that the present model is testable by the earth based DM direct detection experiments like Xenon-1T and in future by Darwin.

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Section: B Simulation Detailsmentioning

confidence: 99%

Singlet-triplet fermionic dark matter and LHC phenomenology

et al. 2018

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“…(6) are tree level MSSM mass relations, in the actual analysis the Higgs masses calculated at full one-loop order with SoftSUSY are used. The masses of the CP odd and charged Higgses of the ten benchmark points of Table 2 are still allowed along with the masses of the charginos and neutralinos which belong to a compressed spectrum [72][73][74][75] (for experimental searches on compressed spectra, see Refs. [76][77][78][79]).…”

Section: Charged Higgs Production In Association With a Top (And Bottmentioning

confidence: 99%

Naturalness, the hyperbolic branch, and prospects for the observation of charged Higgs bosons at high luminosity LHC and 27 TeV LHC

Aboubrahim

Nath

2018

Phys. Rev. D

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One of the early criterion proposed for naturalness was a relatively small MSSM Higgs mixing parameter µ with µ/M Z of the order of a few. A relatively small µ may lead to heavier Higgs masses (H 0 , A, H ± in MSSM) which are significantly lighter than other scalars such as squarks. Such a situation is realized on the hyperbolic branch of radiative breaking of the electroweak symmetry. In this analysis we construct supergravity unified models with relatively small µ in the sense described above and discuss the search for the charged Higgs boson H ± at HL-LHC and HE-LHC where we also carry out a relative comparison of the discovery potential of the two using the decay channel H ± → τ ν. It is shown that an analysis based on the traditional linear cuts on signals and backgrounds is not very successful in extracting the signal while, in contrast, machine learning techniques such as boosted decision trees prove to be far more effective. Thus it is shown that models not discoverable with the conventional cut analyses become discoverable with machine learning techniques. Using boosted decision trees we consider several benchmarks and analyze the potential for their 5σ discovery at the 14 TeV HL-LHC and at 27 TeV HE-LHC. It is shown that while the ten benchmarks considered with the charged Higgs boson mass in the range 373 GeV-812 GeV are all discoverable at HE-LHC, only four of the ten with Higgs boson masses in the range 373 GeV-470 GeV are discoverable at HL-LHC. Further, while the model points discoverable at both HE-LHC and HL-LHC would require up to 7 years of running time at HL-LHC, they could all be discovered in a period of few months at HE-LHC. The analysis shows that a transition from HL-LHC to HE-LHC when technologically feasible would expedite the discovery of the charged Higgs for the benchmarks considered in this work. We note that the observation of a charged Higgs boson with mass in the range indicated would lend support to the idea of naturalness defined by a relatively small µ and further, it will lend support to radiative breaking of the electroweak symmetry occurring on the hyperbolic branch. *

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“…In view of the null results at the Run 1 and Run 2 of LHC, compressed SUSY (cSUSY) [1][2][3][4] has gained relevance in its ongoing pursuit, primarily aimed at looking at the elusive scenario of new physics with a significantly degenerate mass spectra. In such scenarios and more specifically in the minimal supersymmetric standard model (MSSM) with the lightest neutralino ( χ 0 1 ) as the lightest SUSY particle (LSP), the signals are characterized by soft final state objects including low missing transverse momentum ( / E T ) [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, in non-minimal scenarios, the SUSY signals maybe substantially modified in the presence of alternative candidates for LSP and provide valuable probes of detection for the MSSM sector [14,15].…”

Section: Introductionmentioning

confidence: 99%

Boosted jet techniques for a supersymmetric scenario with gravitino LSP

Bhardwaj

Dutta

Konar

et al. 2020

J. High Energ. Phys.

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Search for compressed supersymmetry at multi-TeV scale, in the presence of a light gravitino dark matter, can get sizable uplift while looking into the associated fat- jets with missing transverse momenta as a signature of the boson produced in the decay process of much heavier next-to-lightest sparticle. We focus on the hadronic decay of the ensuing Higgs and/or Z boson giving rise to at least two fat-jets and "Image missing" in the final state. We perform a detailed background study adopting a multivariate analysis using a boosted decision tree to provide a robust investigation to explore the discovery potential for such signal at 14 TeV LHC considering different benchmark points satisfying all the theoretical and experimental constraints. This channel provides the best discovery prospects with most of the benchmarks discoverable within an integrated luminosity of $$ \mathrm{\mathcal{L}} $$ ℒ = 200 fb−1. Kinematic observables are investigated in order to distinguish between compressed and uncompressed spectra having similar event yields.

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A revisit to a compressed supersymmetric spectrum with 125 GeV Higgs

Cited by 22 publications

References 101 publications

Singlet-triplet fermionic dark matter and LHC phenomenology

Singlet-triplet fermionic dark matter and LHC phenomenology

Naturalness, the hyperbolic branch, and prospects for the observation of charged Higgs bosons at high luminosity LHC and 27 TeV LHC

Boosted jet techniques for a supersymmetric scenario with gravitino LSP

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