The Higgs mass and natural supersymmetric spectrum from the landscape

Baer, Howard; Barger, V.; Savoy, Michael; Serce, Hasan

doi:10.1016/j.physletb.2016.05.010

Cited by 36 publications

(47 citation statements)

References 64 publications

(70 reference statements)

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“…Several factors intervene to counteract this expectation [11]. First, electroweak symmetry must be properly broken: no charge or color breaking vacua (CCB) are allowed.…”

Section: Introductionmentioning

confidence: 99%

Mirage mediation from the landscape

Baer

Barger

Sengupta

2020

Phys. Rev. Research

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Rather general considerations from the string theory landscape suggest a statistical preference within the multiverse for soft SUSY breaking terms as large as possible subject to a pocket universe value for the weak scale not greater than a factor of 2-5 from our measured value. Within the gravity/moduli-mediated SUSY breaking framework, the Higgs mass is pulled to m h 125 GeV while first/second generation scalars are pulled to tens of TeV scale and gauginos and third generation scalars remain at the few TeV range. In this case, one then expects comparable moduli-and anomaly-mediated contributions to soft terms, leading to mirage mediation. For an assumed stringy natural value of the SUSY µ parameter, we evaluate predicted sparticle mass spectra for mirage mediation from a statistical scan of the string landscape. We then expect a compressed spectrum of gauginos along with a higgsino-like LSP. For a linear (quadratic) statistical draw with gravitino mass m 3/2 ∼ 20 TeV, then the most probable mirage scale is predicted to be around µ mir ∼ 10 13 (10 14 ) GeV. SUSY should appear at high-luminosity LHC via higgsino pair production into soft dilepton pairs. Distinguishing mirage mediation from models with unified gaugino masses may have to await construction of an ILC with √ s > 2m(higgsino). *

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“…Several factors intervene to counteract this expectation [11]. First, electroweak symmetry must be properly broken: no charge or color breaking vacua (CCB) are allowed.…”

Section: Introductionmentioning

confidence: 99%

Mirage mediation from the landscape

Baer

Barger

Sengupta

2020

Phys. Rev. Research

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“…For instance, if the soft terms scan as in the string landscape picture, then their moduli-mediated contributions may be expected to be parametrized by a continuous value. For models which generate a small µ term ∼ 100 GeV from multi-TeV soft terms, such as radiative Peccei-Quinn breaking [28], it has been suggested that the statistical pull by the landscape towards large soft terms, coupled with the anthropic requirement of m weak ∼ 100 GeV, acts as an attractor towards natural SUSY soft term boundary conditions [29].…”

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confidence: 99%

Natural generalized mirage mediation

et al. 2016

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In the supersymmetric scenario known as mirage mediation (MM), the soft SUSY breaking terms receive comparable anomaly-mediation and moduli-mediation contributions leading to the phenomenon of mirage unification. The simplest MM SUSY breaking models which are consistent with the measured Higgs mass and sparticle mass constraints are strongly disfavoured by fine-tuning considerations. However, while MM makes robust predictions for gaugino masses, the scalar sector is quite sensitive to specific mechanisms for moduli stabilization and potential uplifting. We suggest here a broader setup of generalized mirage mediation (GMM), where heretofore discrete parameters are allowed as continuous to better parametrize these other schemes. We find that natural SUSY spectra consistent with both the measured value of m(h). as well as LHC lower bounds on superpartner masses are then possible. We explicitly show that models generated from natural GMM may be beyond the reach of even high-luminosity LHC searches. In such a case, the proposed International Linear e^+e^- Collider (ILC) will be required for natural SUSY discovery via higgsino pair production reactions. We also outline prospects for detection of higgsino-like WIMPs from natural GMM.Comment: 18 pages plus 7 .png figures; this revised version corrects a numerical error in the published version wherein a benchmark input value is corrected to be a_3=5.

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“…In refs. [93] and [77], it is noted that large c m solutions may be favoured by a string theory landscape which prefers large soft terms, consistent with the anthropic weak scale requirement m W,Z,h ∼ 100 GeV. In figure 5, we show variation of ∆ EW , m h and mt 1 versus a 3 (left-column) and tan β (right-column).…”

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confidence: 61%

“…For instance, if the soft terms scan as in the string landscape picture [74], then their moduli-mediated contributions may be expected to be parametrized by a continuous value. For models which generate a small µ term ∼ 100 GeV from multi-TeV soft terms, such as in the KimNilles mechanism [75] with radiative Peccei-Quinn breaking [76], it has been suggested that the statistical pull by the landscape towards large soft terms, coupled with the anthropic requirement of m weak ∼ 100 GeV, acts as an attractor towards natural SUSY soft term boundary conditions [77].…”

Section: Natural Generalized Mirage Mediationmentioning

confidence: 99%

Superparticle phenomenology from the natural mini-landscape

Baer

Barger

Savoy

et al. 2017

J. High Energ. Phys.

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The methodology of the heterotic mini-landscape attempts to zero in on phenomenologically viable corners of the string landscape where the effective low energy theory is the Minimal Supersymmetric Standard Model with localized grand unification. The gaugino mass pattern is that of mirage-mediation. The magnitudes of various SM Yukawa couplings point to a picture where scalar soft SUSY breaking terms are related to the geography of fields in the compactified dimensions. Higgs fields and third generation scalars extend to the bulk and occur in split multiplets with TeV scale soft masses. First and second generation scalars, localized at orbifold fixed points or tori with enhanced symmetry, occur in complete GUT multiplets and have much larger masses. This picture can be matched onto the parameter space of generalized mirage mediation. Naturalness considerations, the requirement of the observed electroweak symmetry breaking pattern, and LHC bounds on mg together limit the gravitino mass to the m 3/2 ∼ 5-60 TeV range. The mirage unification scale is bounded from below with the limit depending on the ratio of squark to gravitino masses. We show that while natural SUSY in this realization may escape detection even at the high luminosity LHC, the high energy LHC with √ s = 33 TeV could unequivocally confirm or exclude this scenario. It should be possible to detect the expected light higgsinos at the ILC if these are kinematically accessible, and possibly also discriminate the expected compression of gaugino masses in the natural mini-landscape picture from the mass pattern expected in models with gaugino mass unification. The thermal WIMP signal should be accessible via direct detection searches at the multi-ton noble liquid detectors such as XENONnT or LZ.

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The Higgs mass and natural supersymmetric spectrum from the landscape

Cited by 36 publications

References 64 publications

Mirage mediation from the landscape

Mirage mediation from the landscape

Natural generalized mirage mediation

Superparticle phenomenology from the natural mini-landscape

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