Low fine tuning in the MSSM with higgsino dark matter and unification constraints

Kowalska, Kamila; Roszkowski, Leszek; Sessolo, Enrico Maria; Trojanowski, Sebastian

doi:10.1007/jhep04(2014)166

Cited by 43 publications

(37 citation statements)

References 196 publications

(256 reference statements)

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“…However, this also makes it very difficult to test even in the long run. A similar conclusion is shared in the context of gravity mediation by grand unified theory (GUT) models with the non-universal gaugino masses induced by the breaking of the GUT group [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 69%

“…(19)(20)(21)(22) show that the NLSP decay rate is always inversely proportional to the gravitino mass, hence on the gauge mediation scale, as m G ∝ M . Therefore, higher messenger scales will correspond to more long-lived NLSP.…”

Section: Lhc Phenomenologymentioning

confidence: 99%

“…Eqs. (19,20). Possible strategies to test this kind of displaced neutralino decays at the LHC have been proposed in [74].…”

Section: Lhc Phenomenologymentioning

confidence: 99%

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Low fine-tuning in Yukawa-deflected gauge mediation

Ahmed

Mustafayev

et al. 2017

Phys. Rev. D

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We discuss a class of models with gauge-mediated supersymmetry breaking characterized by a non-unified messenger sector inducing non-standard gaugino mass ratios, as well as by additional contributions to the soft mass terms from a matter-messenger coupling. The well-known effect of this coupling is to generate A-terms at one-loop level, hence raising the Higgs mass without relying on super-heavy stops. At the same time, a hierarchy between Wino and gluino masses, as induced by the non-unified messenger fields, can greatly lower the radiative corrections to the Higgs soft mass term driven by the high-energy parameters, thus reducing the fine tuning. We search for models with low fine tuning within this scenario, and we discuss the spectrum, collider phenomenology, constraints, and prospects of the found solutions. We find that some setups are accessible or already excluded by searches at the Large Hadron Collider, and all our scenarios with a tuning better than about 2% can be tested at the International Linear Collider.

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Section: Introductionmentioning

confidence: 69%

Section: Lhc Phenomenologymentioning

confidence: 99%

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Low fine-tuning in Yukawa-deflected gauge mediation

Ahmed

Mustafayev

et al. 2017

Phys. Rev. D

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“…On the other hand, in the T R = 10 GeV case prospects for DM discovery are much worse. Only a small fraction of the allowed region can be covered by Xenon1T; it is characterised by high m 0 , low m 1/2 and low |A 0 |, where, according to [48], µ can be suppressed by the negative m 2 Hu (SUSY) tending closer to zero,…”

Section: Jhep11(2014)146mentioning

confidence: 99%

Neutralino and gravitino dark matter with low reheating temperature

Roszkowski

Trojanowski

Turzyński

2014

J. High Energ. Phys.

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We examine a scenario in which the reheating temperature T R after inflation is so low that it is comparable to, or lower than, the freeze out temperature of ordinary WIMPs. In this case the relic abundance of dark matter is reduced, thus relaxing the impact of the usually strong constraint coming from the requirement that the universe does not overclose. We first re-examine the dynamics of freezeout during reheating. Next we study the parameter space of the MSSM with ten free parameters, the Constrained MSSM and the singlino-dominated regions of the Next-to-MSSM. In each case we often find dramatic departures from the usually considered regime of high T R , with important implications for direct detection dark matter searches. In particular, in the MSSM we examine WIMP mass range up to about 5 TeV, and we find large regions of bino dark matter over the whole mass range, and of higgsino dark matter with mass over a similar range but starting from the ∼ 1 TeV value of the standard high T R scenario. We show that the prospects for bino detection strongly depend on T R , while the higgsino is for the most part detectable by future one-tonne detectors. The wino, which is excluded in the standard scenario, becomes allowed again if its mass is roughly above 3.5 TeV, and can also be partially detectable. In the CMSSM, the bino and higgsino mass ranges become much more constrained although detection prospects remain roughly similar. In the Next-to-MSSM we show that, at low enough T R wide ranges of singlino-dominated parameter space of the model become again cosmologically allowed, although detection prospects remain nearly hopeless. We also study the non-thermal contribution to the DM relic density from direct and cascade decays of the inflaton. Finally, in the framework of the MSSM we consider the case of a gravitino as dark matter. In this case we find strong bounds from overclosure and from Big Bang Nucleosynthesis, and derive lower limits on T R which depend on the gravitino mass and on the nature of the lightest ordinary superpartner.

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“…The original focus point allowed to obtain the proper electroweak symmetry breaking scale for large values of the squark and slepton masses and subleading values of the stop mixing parameter A t and gaugino masses M a . More recently, this solution was reconsidered, including the presence of large stop mixing A t [11], large (non universal) gaugino masses [12][13][14] and in the framework of gauge mediation [15,16].…”

Section: Jhep04(2014)093mentioning

confidence: 99%

General focus point in the MSSM

Delgado

Quirós

Wagner

2014

J. High Energ. Phys.

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Abstract:The minimal supersymmetric extension of the Standard Model (SM) is a well motivated scenario for physics beyond the SM, which allows a perturbative description of the theory up to scales of the order of the Grand Unification scale, where gauge couplings unify. The Higgs mass parameter is insensitive to the ultraviolet physics and is only sensitive to the scale of soft supersymmetry breaking parameters. Present collider bounds suggest that the characteristic values of these parameters may be significantly larger than the weak scale. Large values of the soft breaking parameters, however, induce large radiative corrections to the Higgs mass parameter and therefore the proper electroweak scale may only be obtained by a fine tuned cancellation between the square of the holomorphic µ parameter and the Higgs supersymmetry breaking square mass parameter. This can only be avoided if there is a correlation between the scalar and gaugino mass parameters, such that the Higgs supersymmetry breaking parameter remains of the order of the weak scale. The scale at which this happens is dubbed as focus point. In this article, we define the general conditions required for this to happen, for different values of the messenger scale at which supersymmetry breaking is transmitted to the observable sector, and for arbitrary boundary conditions of the sfermion, gaugino, and Higgs mass parameters. Specific supersymmetry breaking scenarios in which these correlations may occur are also discussed.

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Low fine tuning in the MSSM with higgsino dark matter and unification constraints

Cited by 43 publications

References 196 publications

Low fine-tuning in Yukawa-deflected gauge mediation

Low fine-tuning in Yukawa-deflected gauge mediation

Neutralino and gravitino dark matter with low reheating temperature

General focus point in the MSSM

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