Long-lived higgsinos as probes of gravitino dark matter at the LHC

Bobrovskyi, S.; Hajer, Jan; Rydbeck, Sara

doi:10.1007/jhep02(2013)133

Cited by 28 publications

(29 citation statements)

References 90 publications

(132 reference statements)

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“…16. While this gravitino problem has been considered since the early 1980s [396,371,84,86,87,372,373] it has recently been updated in [328,330,378,397,379,331,83,398,376,[399][400][401][402][403][404]. In the MSSM with gravitino DM, the neutralino is disfavored as NLSP [323,221,[405][406][407] unless mG 1 GeV [379,83].…”

Section: Gravitino Dark Mattermentioning

confidence: 98%

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

et al. 2015

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a b s t r a c tIncreasingly stringent limits from LHC searches for new physics, coupled with lack of convincing signals of weakly interacting massive particle (WIMP) in dark matter searches, have tightly constrained many realizations of the standard paradigm of thermally produced WIMPs as cold dark matter. In this article, we review more generally both thermally and non-thermally produced dark matter (DM). One may classify DM models into two broad categories: one involving bosonic coherent motion (BCM) and the other involving WIMPs. BCM and WIMP candidates need, respectively, some approximate global symmetries and almost exact discrete symmetries. Supersymmetric axion models are highly motivated since they emerge from compelling and elegant solutions to the two fine-tuning problems of the Standard Model: the strong CP problem and the gauge hierarchy problem. We review here non-thermal relics in a general setup, but we also pay particular attention to the rich cosmological properties of various aspects of mixed SUSY/axion dark matter candidates which can involve both WIMPs and BCM in an interwoven manner. We also review briefly a panoply of alternative thermal and non-thermal DM candidates.

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Section: Gravitino Dark Mattermentioning

confidence: 98%

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

et al. 2015

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“…These cuts also remove completely the SM background, as it was shown in refs. [69][70][71]73]. In fact, in ref.…”

Section: Jhep05(2014)035mentioning

confidence: 98%

“…As it is shown in refs. [69][70][71]73] the main SM background is due to γ * /Z * → ℓ + ℓ − , Z * Z * . The cut imposed in the decay length is very effective and it can be seen that when it is combined with the condition that the invariant mass of two leptons are greater than 5 GeV, the SM background can be totally removed.…”

Section: Jhep05(2014)035mentioning

confidence: 99%

Displaced vertices and long-lived charged particles in the NMSSM with right-handed sneutrinos

Cerdeño

Lozano

Seto

2014

J. High Energ. Phys.

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Abstract:We study LHC signatures of displaced vertices and long-lived charged particles within the context of the Next-to-Minimal Supersymmetric Standard Model with righthanded (RH) sneutrinos. In this construction the RH neutrino can be produced directly from Higgs decays or in association with a RH sneutrino when the latter is the lightest supersymmetric particle. The RH neutrino is generally long-lived, since its decay width is proportional to the neutrino Yukawa, a parameter which is predicted to be small. The RH neutrino late decay can therefore give rise to displaced vertices at the LHC, which can be identified through the decay products, which involve two leptons (2ℓ + / E T ) or a lepton with two jets (ℓjj). We simulate this signal for the current LHC configuration (a centre of mass of 8 TeV and an integrated luminosity of L = 20 fb −1 ), and a future one (13 TeV and L = 100 fb −1 ). We show that a region of the parameter space of this model can be probed and that the RH neutrino mass can be reconstructed from the end-point of the two-lepton invariant mass distribution or the central value of the mass distribution for two jets plus one lepton. Another exotic signature of this construction is the production of a long-lived stau. If the stau is the next-to-lightest supersymmetric particle, it can decay through diagrams involving the small neutrino Yukawa, and would escape the detector leaving a characteristic trail. We also simulate this signal for various benchmark points and show that the model can be within the reach of the future run of the LHC.

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“…Collider studies of probing the higgsino NLSP decays for suitable values of ΛM mess may be performed similar to the analyses made in refs. [141][142][143][144][145]. This is however beyond the scope of the present work.…”

Section: Jhep01(2018)158mentioning

confidence: 86%

Exploring non-holomorphic soft terms in the framework of gauge mediated supersymmetry breaking

Chattopadhyay

Das

Mukherjee

2018

J. High Energ. Phys.

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It is known that in the absence of a gauge singlet field, a specific class of supersymmetry (SUSY) breaking non-holomorphic (NH) terms can be soft breaking in nature so that they may be considered along with the Minimal Supersymmetric Standard Model (MSSM) and beyond. There have been studies related to these terms in minimal supergravity based models. Consideration of an F-type SUSY breaking scenario in the hidden sector with two chiral superfields however showed Planck scale suppression of such terms. In an unbiased point of view for the sources of SUSY breaking, the NH terms in a phenomenological MSSM (pMSSM) type of analysis showed a possibility of a large SUSY contribution to muon g − 2, a reasonable amount of corrections to the Higgs boson mass and a drastic reduction of the electroweak fine-tuning for a higgsino dominated χ 0 1 in some regions of parameter space. We first investigate here the effects of the NH terms in a low scale SUSY breaking scenario. In our analysis with minimal gauge mediated supersymmetry breaking (mGMSB) we probe how far the results can be compared with the previous pMSSM plus NH terms based study. We particularly analyze the Higgs, stop and the electroweakino sectors focusing on a higgsino dominated χ 0 1 and χ ± 1 , a feature typically different from what appears in mGMSB. The effect of a limited degree of RG evolutions and vanishing of the trilinear coupling terms at the messenger scale can be overcome by choosing a non-minimal GMSB scenario, such as one with a matter-messenger interaction.

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Long-lived higgsinos as probes of gravitino dark matter at the LHC

Cited by 28 publications

References 90 publications

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

Displaced vertices and long-lived charged particles in the NMSSM with right-handed sneutrinos

Exploring non-holomorphic soft terms in the framework of gauge mediated supersymmetry breaking

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