Light singlino dark matter at the LHC

Guchait, M.

doi:10.1103/physrevd.102.075023

Cited by 30 publications

(17 citation statements)

References 101 publications

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“…Considering the dilemma of the Z 3 -NMSSM in DM physics, the DM physics of the GNMSSM are scrutinized herein. Our results are quite different from those of previous studies on Singlino-dominated DM, which worked in the framework of the Z 3 -NMSSM [9,10,13,14,[17][18][19][20][21][22][23].…”

Section: Jhep06(2021)176contrasting

confidence: 99%

Singlino-dominated dark matter in general NMSSM

Cao

Lian

et al. 2021

J. High Energ. Phys.

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The general Next-to-Minimal Supersymmetric Standard Model (NMSSM) describes the singlino-dominated dark-matter (DM) property by four independent parameters: singlet-doublet Higgs coupling coefficient λ, Higgsino mass μtot, DM mass $$ {m}_{{\tilde{\chi}}_1^0} $$ m χ ˜ 1 0 , and singlet Higgs self-coupling coefficient κ. The first three parameters strongly influence the DM-nucleon scattering rate, while κ usually affects the scattering only slightly. This characteristic implies that singlet-dominated particles may form a secluded DM sector. Under such a theoretical structure, the DM achieves the correct abundance by annihilating into a pair of singlet-dominated Higgs bosons by adjusting κ’s value. Its scattering with nucleons is suppressed when λv/μtot is small. This speculation is verified by sophisticated scanning of the theory’s parameter space with various experiment constraints considered. In addition, the Bayesian evidence of the general NMSSM and that of Z3-NMSSM is computed. It is found that, at the cost of introducing one additional parameter, the former is approximately 3.3 × 103 times the latter. This result corresponds to Jeffrey’s scale of 8.05 and implies that the considered experiments strongly prefer the general NMSSM to the Z3-NMSSM.

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Section: Jhep06(2021)176contrasting

confidence: 99%

Singlino-dominated dark matter in general NMSSM

Cao

Lian

et al. 2021

J. High Energ. Phys.

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“…Furthermore, the mentioned γ-ray excess as observed by the Fermi-LAT experiment also seems to fit better with a not so heavy bino-like DM of the NMSSM when compared to the MSSM, in the presence of light singlet scalars [48][49][50][51][52][53]. Phenomenological studies of efficient search-strategies of such light scalars (irrespective of the nature of the LSP) have remained to be an active enterprise [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69] while their actual searches constitute a dedicated and a vibrant programme at the LHC [70][71][72][73][74][75][76][77].…”

Section: Introductionmentioning

confidence: 92%

A relatively light, highly bino-like dark matter in the Z3-symmetric NMSSM and recent LHC searches

Abdallah

Datta

Roy

2021

J. High Energ. Phys.

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A highly bino-like Dark Matter (DM), which is the Lightest Supersymmetric Particle (LSP), could be motivated by the stringent upper bounds on the DM direct detection rates. This is especially so when its mass is around or below 100 GeV for which such a bound tends to get most severe. Requiring not so large a higgsino mass parameter, that would render the scenario reasonably ‘natural’, prompts such a bino-like state to be relatively light. In the Minimal Supersymmetric Standard Model (MSSM), in the absence of comparably light scalars, such an excitation, if it has to be a thermal relic, is unable to meet the stringent experimental upper bound on its abundance unless its self-annihilation hits a funnel involving either the Z-boson or the Standard Model (SM)-like Higgs boson. We demonstrate that, in such a realistic situation, a highly bino-like DM of the popular Z3-symmetric Next-to-Minimal Supersymmetric Standard Model (NMSSM) is viable over an extended range of its mass, from our targeted maximum in the vicinity of the mass of the top quark down to about 30 GeV. This is facilitated by the presence of comparably light singlet-like states that could serve as funnel (scalars) and/or coannihilating (singlino) states even as the bino-like LSP receives a minimal (but optimal) tempering triggered by suitably light higgsino states that, in the first place, evade stringent lower bounds on their masses that can be derived from the Large Hadron Collider (LHC) experiments only in the presence of a lighter singlino-like state. An involved set of blind spot conditions is derived for the DM direct detection rates by considering for the very first time the augmented system of neutralinos comprising of the bino, the higgsinos and the singlino which highlights the important roles played by the NMSSM parameters ‘λ’ and tan β in delivering a richer phenomenology.

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“…Next, we consider the Next-to-Minimal Supersymmetric Standard Model with a Z 3 symmetry (Z 3 -NMSSM) [99,100]. This model extends MSSM by a gaugesinglet Higgs superfield Ŝ, and has the advantage that either a Bino-dominated (in most physical cases) or a Singlino-dominated neutralino can act as a viable DM candidate [97,[101][102][103][104][105][106][107][108][109][110][111]. The Bino-dominated DM candidate differs from the MSSM prediction mainly in that it could co-annihilate with a Singlino-dominated neutralino to obtain the measured abundance [104].…”

Section: Introductionmentioning

confidence: 99%

Impact of recent $(g-2)_μ$ measurement on the light CP-even Higgs scenario in general Next-to-Minimal Supersymmetric Standard Model

Cao,

Lian,

Pan

et al. 2022

Preprint

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The General Next-to-Minimal Supersymmetric Standard Model (GN-MSSM) is an attractive theory that is free from the tadpole problem and the domainwall problem of Z 3 -NMSSM, and can form an economic secluded dark matter (DM) sector to naturally predict the DM experimental results. It also provides mechanisms to easily and significantly weaken the constraints from the LHC search for supersymmetric particles. These characteristics enable the theory to explain the recently measured muon anomalous magnetic moment, (g − 2) µ , in a broad parameter space that is consistent with all experimental results and at same time keeps the electroweak symmetry breaking natural. This work focuses on a popular scenario of the GNMSSM in which the next-to-lightest CP-even Higgs boson corresponds to the scalar discovered at the Large Hadron Collider (LHC). Both analytic formulae and a sophisticated numerical study show that in order to predict the scenario without significant tunings of relevant parameters, the Higgsino mass µ tot 500 GeV and tan β 30 are preferred. This character, if combined with the requirement to account for the (g − 2) µ anomaly, will entail some light sparticles and make the LHC constraints very tight. As a result, this scenario can explain the muon anomalous magnetic moment in very narrow corners of its parameter space.

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Light singlino dark matter at the LHC

Cited by 30 publications

References 101 publications

Singlino-dominated dark matter in general NMSSM

Singlino-dominated dark matter in general NMSSM

A relatively light, highly bino-like dark matter in the Z3-symmetric NMSSM and recent LHC searches

Impact of recent $(g-2)_μ$ measurement on the light CP-even Higgs scenario in general Next-to-Minimal Supersymmetric Standard Model

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