Current bounds and future prospects of light neutralino dark matter in NMSSM
| Autor: | Rahool Kumar Barman, Xerxes Tata, Geneviève Bélanger, Biplob Bhattacherjee, Rohini M. Godbole, Dipan Sengupta |
|---|---|
| Přispěvatelé: | Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Particle physics
Cold dark matter neutralino: mass Higgs particle: singlet FOS: Physical sciences Higgs particle: invisible decay 01 natural sciences Next-to-Minimal Supersymmetric Standard Model Chargino High Energy Physics - Phenomenology (hep-ph) minimal supersymmetric standard model: parameter space LSP: dark matter 0103 physical sciences CERN LHC Coll: upgrade 010306 general physics Physics neutralino: relic density Higgsino: pair production neutralino: LSP 010308 nuclear & particles physics Branching fraction new physics dark matter: relic density High Energy Physics::Phenomenology Supersymmetry High Energy Physics - Phenomenology Beyond the standard model supersymmetry: dark matter [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] Neutralino Higgs boson Wino: pair production High Energy Physics::Experiment neutralino: dark matter Energy (signal processing) |
| Zdroj: | Physical Review D Physical Review D, American Physical Society, 2021, 103 (1), pp.015029. ⟨10.1103/PhysRevD.103.015029⟩ Physical Review |
| ISSN: | 1550-7998 1550-2368 |
| DOI: | 10.1103/PhysRevD.103.015029⟩ |
| Popis: | Unlike its minimal counterpart, the Next to Minimal supersymmetric Standard Model (NMSSM) allows the possibility that the lightest neutralino could have a mass as small as $\sim 1 {\rm GeV}$ while still providing a significant component of relic dark matter (DM). Such a neutralino can provide an invisible decay mode to the Higgs as well. Further, the observed SM-like Higgs boson ($H_{125}$) could also have an invisible branching fraction as high as $\sim 19\%$. Led by these facts, we first delineate the region of parameter space of the NMSSM with a light neutralino ($M_{{\tilde{\chi}}_{1}^{0}} < 62.5 {\rm GeV}$) that yields a thermal neutralino relic density smaller than the measured relic density of cold dark matter, and is also compatible with constraints from collider searches, searches for dark matter, and from flavor physics. We then examine the prospects for probing the NMSSM with a light neutralino via direct DM detection searches, via invisible Higgs boson width experiments at future $e^+e^-$ colliders, via searches for a light singlet Higgs boson in $2b2\mu$, $2b2\tau$ and $2\mu2\tau$ channels and via pair production of winos or doublet higgsinos at the high luminosity LHC and its proposed energy upgrade. For this last-mentioned electroweakino search, we perform a detailed analysis to map out the projected reach in the $3l+{\rm E{\!\!\!/}_T}$ channel, assuming that chargino decays to $W {\tilde{\chi}}_{1}^{0}$ and the neutralino(s) decay to $Z$ or $H_{125}$ + ${\tilde{\chi}}_{1}^{0}$. We find that the HL-LHC can discover SUSY in just part of the parameter space in each of these channels, which together can probe almost the entire parameter space. The HE-LHC probes essentially the entire region with higgsinos (winos) lighter than 1 TeV (2 TeV) independently of how the neutralinos decay, and leads to significantly larger signal rates. Comment: 57 pages, 25 figures, 13 tables; v2: references added, version accepted for publication in PRD |
| Databáze: | OpenAIRE |
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