Connecting multi-lepton anomalies at the LHC and in Astrophysics with MeerKAT/SKA

Beck, Geoff; Temo, Ralekete; Elias, Malwa,; Kumar, Mukesh; Garcia, B. R. Mellado

doi:10.48550/arxiv.2102.10596

Cited by 6 publications

(7 citation statements)

References 48 publications

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“…The combined significance of the excesses related to the cross-section measurements of tt W ± and tttt surpass 3σ , as detailed in Table 4. It is important to note that the ATLAS collaboration has reported a small excess in the production of four leptons with a same flavour OS pair consistent with a Z boson, where the four-lepton invariant mass, m 4 < 400 GeV [447]. This excess can also be accommodated by the direct production of A → Z H.…”

Section: Ss and 3 With B-quarksmentioning

confidence: 99%

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Unveiling hidden physics at the LHC

et al. 2022

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The field of particle physics is at the crossroads. The discovery of a Higgs-like boson completed the Standard Model (SM), but the lacking observation of convincing resonances Beyond the SM (BSM) offers no guidance for the future of particle physics. On the other hand, the motivation for New Physics has not diminished and is, in fact, reinforced by several striking anomalous results in many experiments. Here we summarise the status of the most significant anomalies, including the most recent results for the flavour anomalies, the multi-lepton anomalies at the LHC, the Higgs-like excess at around 96 GeV, and anomalies in neutrino physics, astrophysics, cosmology, and cosmic rays. While the LHC promises up to 4 $$\hbox {ab}^{-1}$$ ab - 1 of integrated luminosity and far-reaching physics programmes to unveil BSM physics, we consider the possibility that the latter could be tested with present data, but that systemic shortcomings of the experiments and their search strategies may preclude their discovery for several reasons, including: final states consisting in soft particles only, associated production processes, QCD-like final states, close-by SM resonances, and SUSY scenarios where no missing energy is produced. New search strategies could help to unveil the hidden BSM signatures, devised by making use of the CERN open data as a new testing ground. We discuss the CERN open data with its policies, challenges, and potential usefulness for the community. We showcase the example of the CMS collaboration, which is the only collaboration regularly releasing some of its data. We find it important to stress that individuals using public data for their own research does not imply competition with experimental efforts, but rather provides unique opportunities to give guidance for further BSM searches by the collaborations. Wide access to open data is paramount to fully exploit the LHCs potential.

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Section: Ss and 3 With B-quarksmentioning

confidence: 99%

“…Interestingly, the model can explain anomalies in astro-physics (the positron excess of AMS-02 [436] and the excess in gamma-ray fluxes from the galactic center measured by Fermi-LAT [437]) (see Sect. 2.5) if it is supplemented by a Dark Matter candidate [438].…”

Section: Multi-lepton Anomalies At the Lhcmentioning

confidence: 99%

Unveiling hidden physics at the LHC

et al. 2022

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“…Interestingly, the model can explain anomalies in astro-physics (the positron excess of AMS-02 [436] and the excess in gamma-ray fluxes from the galactic center measured by Fermi-LAT [437]) (see Sec. 2.5) if it is supplemented by a Dark Matter candidate [438].…”

Section: Multi-lepton Anomalies At the Lhcmentioning

confidence: 99%

Unveiling Hidden Physics at the LHC

Fischer¹,

Garcia²,

Antusch³

et al. 2021

Preprint

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The field of particle physics is at the crossroads. The discovery of a Higgs-like boson completed the Standard Model (SM), but the lacking observation of convincing resonances Beyond the SM (BSM) offers no guidance for the future of particle physics. On the other hand, the motivation for New Physics has not diminished and is, in fact, reinforced by several striking anomalous results in many experiments. Here we summarise the status of the most significant anomalies, including the most recent results for the flavour anomalies, the multi-lepton anomalies at the LHC, the Higgs-like excess at around 96 GeV, and anomalies in neutrino physics, astrophysics, cosmology, and cosmic rays.While the LHC promises up to 4 ab −1 of integrated luminosity and far-reaching physics programmes to unveil BSM physics, we consider the possibility that the latter could be tested with present data, but that systemic shortcomings of the experiments and their search strategies may preclude their discovery for several reasons, including: final states consisting in soft particles only, associated production processes, QCD-like final states, close-by SM resonances, and SUSY scenarios where no missing energy is produced.New search strategies could help to unveil the hidden BSM signatures, devised by making use of the CERN open data as a new testing ground. We discuss the CERN open data with its policies, challenges, and potential usefulness for the community. We showcase the example of the CMS collaboration, which is the only collaboration regularly releasing some of its data. We find it important to stress that individuals using public data for their own research does not imply competition with experimental efforts, but rather provides unique opportunities to give guidance for further BSM searches by the collaborations.Wide access to open data is paramount to fully exploit the LHCs potential.

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“…Since the H 1 , and generally also the A 1 , lie below ∼100 GeV [20,21], this opens up multiple self-annihilation channels for the χ 0 1 , which are precluded in the MSSM, in order to generate the correct 2 h [22][23][24][25][26][27]. Potential LHC signatures of such a DM have been studied in [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42], and its detection prospects in [43][44][45] (see also [46] for a phenomenological study of the DM in a two-Higgs doublet model with an additional singlet scalar).…”

Section: Introductionmentioning

confidence: 99%

Dark matter in the CP-violating NMSSM

2022

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In the Next-to-Minimal Supersymmetric Standard Model there is a strong correlation between the mass terms corresponding to the singlet Higgs and the singlino interaction states, both of which are proportional to the parameter $$\kappa $$ κ . If this parameter is complex, explicit CP-violation occurs in the Higgs as well as the neutralino sectors of the model at the tree level, unlike in the minimal scenario. A small magnitude of $$\kappa $$ κ typically yields a $${{\mathcal {O}}}$$ O (10) GeV lightest neutralino with a dominant singlino component. In such a scenario, the phase of $$\kappa $$ κ , beside modifying the properties of the five Higgs bosons, can also have a crucial impact on the phenomenology of the neutralino dark matter. In this study we perform a first investigation of this impact on the relic abundance of the dark matter solutions with sub-100 GeV masses, obtained for parameter space configurations of the model that are consistent with a variety of current experimental data.

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Connecting multi-lepton anomalies at the LHC and in Astrophysics with MeerKAT/SKA

Cited by 6 publications

References 48 publications

Unveiling hidden physics at the LHC

Unveiling hidden physics at the LHC

Unveiling Hidden Physics at the LHC

Dark matter in the CP-violating NMSSM

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