Chances for SUSY-GUT in the LHC Epoch

Berezhiani, Zurab; Chianese, Marco; Miele, Gennaro; Morisi, Stefano

doi:10.1007/jhep08(2015)083

Cited by 10 publications

(7 citation statements)

References 91 publications

(174 reference statements)

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“…The latest literature covers topics ranging from global fits to the MSSM with different choices for the number of dimensions in the electroweak scale parameterisation [101][102][103][104][105][106][107], to studies of various aspects of its more constrained versions defined at a high scale [108][109][110][111][112][113][114][115][116][117][118]. Theoretical considerations, such as naturalness [119][120][121][122][123][124][125][126][127][128][129][130], and gauge unification within the MSSM [131][132][133][134][135], have also been a concern. Due to the steady stream of results from the LHC, the implications of collider searches for the MSSM have been a particularly active field of study .…”

Section: Introductionmentioning

confidence: 99%

A global fit of the MSSM with GAMBIT

Athron¹,

Balázs²,

Bringmann³

et al. 2017

Eur. Phys. J. C

123

160

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We study the seven-dimensional Minimal Supersymmetric Standard Model (MSSM7) with the new GAM-BIT software framework, with all parameters defined at the weak scale. Our analysis significantly extends previous weak-scale, phenomenological MSSM fits, by adding more and newer experimental analyses, improving the accuracy and detail of theoretical predictions, including dominant uncertainties from the Standard Model, the Galactic dark matter halo and the quark content of the nucleon, and employing novel and highly-efficient statistical sampling methods to scan the parameter space. We find regions of the MSSM7 a

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Section: Introductionmentioning

confidence: 99%

A global fit of the MSSM with GAMBIT

Athron¹,

Balázs²,

Bringmann³

et al. 2017

Eur. Phys. J. C

123

160

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“…The Minimal Supersymmetric extension of the SM (MSSM) offers solutions to many of these shortcomings, with substantial implications for dark matter , the cosmic matter-antimatter asymmetry [41][42][43], Higgs physics [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60], the unification of gauge forces [61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76], the stability of the electroweak vacuum [77][78][79][80], cosmological inflation [81][82][83][84][85][86][87][88][89]…”

Section: Introductionmentioning

confidence: 99%

Global fits of GUT-scale SUSY models with GAMBIT

Athron¹,

Balázs²,

Bringmann³

et al. 2017

Eur. Phys. J. C

103

126

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We present the most comprehensive global fits to date of three supersymmetric models motivated by grand unification: the Constrained Minimal Supersymmetric Standard Model (CMSSM), and its Non-Universal Higgs Mass generalisations NUHM1 and NUHM2. We include likelihoods from a number of direct and indirect dark matter searches, a large collection of electroweak precision and flavour observables, direct searches for supersymmetry at LEP and Runs I and II of the LHC, and constraints from Higgs observables. Our analysis improves on existing results not only in terms of the number of included observables, but also in the a e-mail: peter.athron@coepp. level of detail with which we treat them, our sampling techniques for scanning the parameter space, and our treatment of nuisance parameters. We show that stau co-annihilation is now ruled out in the CMSSM at more than 95% confidence. Stop co-annihilation turns out to be one of the most promising mechanisms for achieving an appropriate relic density of dark matter in all three models, whilst avoiding all other constraints. We find high-likelihood regions of parameter space featuring light stops and charginos, making them potentially detectable in the near future at the LHC. We also show that tonne-scale direct detection will play a largely complementary role, probing large parts of the remaining viable parameter space, including essentially all models with multi-TeV neutralinos.

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“…Some models allow these fields to couple to baryonic matter. As for the DM, the paradigm for most favorable candidates shifts now from weakly interacting massive (m ∼ GeV) particles (WIMPs) to light or ultra-light (m ∼ 10 −3 eV down to ∼ 10 −22 eV) axion-like particles (ALPs) (Hui et al 2017;Berezhiani & Khoury 2015;Feng 2010). The main difference between the WIMPs and ALPs is that WIMPs are collisionless and interact only via gravitation, whereas ALPs are self-interacting, behave under special conditions as a quantum liquid and can fundamentally couple to ordinary matter (Irastorza & Redondo 2018).…”

Section: Introductionmentioning

confidence: 99%

Testing the weak equivalence principle by differential measurements of fundamental constants in the Magellanic Clouds

Levshakov

Henkel

et al. 2019

Monthly Notices of the Royal Astronomical Society

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Non-standard fields are assumed to be responsible for phenomena attributed to dark energy and dark matter. Being coupled to ordinary matter, these fields modify the masses and/or charges of the elementary particles, thereby violating the Weak Equivalence Principle. Thus, values of fundamental constants such as the proton-to-electron mass ratio, µ, and/or the fine structure constant, α, measured in different environment conditions can be used as probes for this coupling. Here we perform differential measurements of F = µα 2 to test a non-standard coupling in the Magellanic Clouds -dwarf galaxies where the overall mass budget is dominated by dark matter. The analysis is based on [C i] and CO lines observed with the Herschel Space Observatory. Since these lines have different sensitivities to changes in µ and α, the combined α and µ variations can be evaluated through the radial velocity offsets, ∆V , between the CO and [C i] lines. Averaging over nine positions in the Magellanic Clouds, we obtain ∆V = −0.02 ± 0.07 km s −1 , leading to |∆F/F | < 2 × 10 −7 (1σ), where ∆F/F = (F obs − F lab )/F lab . However, for one position observed with five times higher spectral resolution we find ∆V = −0.05 ± 0.02 km s −1 , resulting in ∆F/F = (−1.7 ± 0.7) × 10 −7 . Whether this offset is due to changes in the fundamental constants, due to chemical segregation in the emitting gas or merely due to Doppler noise requires further investigations.

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Chances for SUSY-GUT in the LHC Epoch

Cited by 10 publications

References 91 publications

A global fit of the MSSM with GAMBIT

A global fit of the MSSM with GAMBIT

Global fits of GUT-scale SUSY models with GAMBIT

Testing the weak equivalence principle by differential measurements of fundamental constants in the Magellanic Clouds

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