The impact of priors and observables on parameter inferences in the constrained MSSM

Trotta, Roberto; Feroz, Farhan; Hobson, M. P.; Roszkowski, Leszek; Austri, Roberto Ruiz de

doi:10.1088/1126-6708/2008/12/024

Cited by 190 publications

(297 citation statements)

References 69 publications

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“…The resulting chains are analysed with an adapted version of the accompanying package GetDist, supplemented with matlab scripts from the package SuperBayeS [112,113]. One-or two-dimensional marginal posterior pdfs are obtained from the chains by dividing the relevant parameter subspace into bins and counting the number of samples per bin.…”

Section: Discussionmentioning

confidence: 99%

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

Arina

Sahu

2012

Nuclear Physics B

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Abstract. The nature of dark matter (DM) particles and the mechanism that provides their measured relic abundance are currently unknown. In this paper we investigate inert scalar and vector like fermion doublet DM candidates with a charge asymmetry in the dark sector, which is generated by the same mechanism that provides the baryon asymmetry, namely baryogenesis-via-leptogenesis induced by decays of scalar triplets. At the same time the model gives rise to neutrino masses in the ballpark of oscillation experiments via type II seesaw. We discuss possible sources of depletion of asymmetry in the DM and visible sectors and solve the relevant Boltzmann equations for quasi-equilibrium decay of triplet scalars. A Monte-Carlo-Markov-Chain analysis is performed for the whole parameter space. The survival of the asymmetry in the dark sector leads to inelastic scattering off nuclei. We then apply bayesian statistic to infer the model parameters favoured by the current experimental data, in particular the DAMA annual modulation and Xenon100 exclusion limit. The latter strongly disfavours asymmetric scalar doublet DM of mass O( TeV) as required by DM-DM oscillations, while an asymmetric vector like fermion doublet DM with mass around 100 GeV is a good candidate for DAMA annual modulation yet satisfying the constraints from Xenon100 data.

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Section: Discussionmentioning

confidence: 99%

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

Arina

Sahu

2012

Nuclear Physics B

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“…This is hardly the only problem faced by the theory (e.g., Kroupa et al 2010;Kuzio de Naray & Spekkens 2011;Bovill & Ricotti 2011), so the persistent failure to detect weakly interacting massive particles (WIMPs) is worrisome. The XENON100 Collaboration (2011) has excluded much of the mass-cross-section parameter space where WIMPs were expected to reside (Trotta et al 2008). Given the persistence of dynamical puzzles (e.g., McGaugh & de Blok 1998a;Sellwood & Kosowsky 2001), one might worry that non-baryonic dark matter does not exist after all.…”

Section: General Constraintsmentioning

confidence: 99%

The Baryonic Tully–fisher Relation of Gas-Rich Galaxies as a Test of Λcdm and Mond

McGaugh

2012

435

459

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The baryonic Tully-Fisher relation (BTFR) is an empirical relation between baryonic mass and rotation velocity in disk galaxies. It provides tests of galaxy formation models in ΛCDM and of alternative theories like modified Newtonian dynamics (MOND). Observations of gas-rich galaxies provide a measure of the slope and normalization of the BTFR that is more accurate (if less precise) than that provided by star-dominated spirals, as their masses are insensitive to the details of stellar population modeling. Recent independent data for such galaxies are consistent with M b = AV 4 f with A = 47 ± 6 M km −4 s 4 . This is equivalent to MOND with a 0 = 1.3 ± 0.3 Å s −2 . The scatter in the data is consistent with being due entirely to observational uncertainties. It is unclear why the physics of galaxy formation in ΛCDM happens to pick out the relation predicted by MOND. We introduce a feedback efficacy parameter E to relate halo properties to those of the galaxies they host. E correlates with star formation rate and gas fraction in the sense that galaxies that have experienced the least star formation have been most impacted by feedback.

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“…This is an updated and improved version of the publicly available SuperBayeS scanning package [43,44]. This Bayesian algorithm, originally designed to compute a model's likelihood and to accurately map out the posterior distribution, can also reliably evaluate the profile likelihood, given appropriate settings [38].…”

Section: Jhep09(2016)175mentioning

confidence: 99%

Dark matter interpretations of ATLAS searches for the electroweak production of supersymmetric particles in s = 8 $$ \sqrt{s}=8 $$ TeV proton-proton collisions

Aaboud

Bergeås

Brenner

et al. 2016

J. High Energ. Phys.

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A selection of searches by the ATLAS experiment at the LHC for the electroweak production of SUSY particles are used to study their impact on the constraints on dark matter candidates. The searches use 20 fb −1 of proton-proton collision data at √ s = 8 TeV. A likelihood-driven scan of a five-dimensional effective model focusing on the gaugino-higgsino and Higgs sector of the phenomenological minimal supersymmetric Standard Model is performed. This scan uses data from direct dark matter detection experiments, the relic dark matter density and precision flavour physics results. Further constraints from the ATLAS Higgs mass measurement and SUSY searches at LEP are also applied. A subset of models selected from this scan are used to assess the impact of the selected ATLAS searches in this five-dimensional parameter space. These ATLAS searches substantially impact those models for which the mass m(χ 0 1 ) of the lightest neutralino is less than 65 GeV, excluding 86% of such models. The searches have limited impact on models with larger m(χ 0 1 ) due to either heavy electroweakinos or compressed mass spectra where the mass splittings between the produced particles and the lightest supersymmetric particle is small. 4 Signal simulation and evaluation of ATLAS constraints 10 5 Impact of the ATLAS electroweak SUSY searches 12 5.1 Impact on the electroweakino masses 12 5.2 Impact on the EWKH model parameters 13 5.3 Impact on dark matter observables 14 Conclusions 19The ATLAS collaboration 27 IntroductionSupersymmetry, or SUSY [1][2][3][4][5][6], is a popular candidate for physics beyond the Standard Model. It provides an elegant solution to the hierarchy problem, which, in the Standard Model, demands high levels of fine tuning to counteract large quantum corrections to the mass of the Higgs boson [7][8][9][10]. R-parity-conserving supersymmetric models can also provide a candidate for dark matter, in the form of the lightest supersymmetric particle (LSP) [11,12]. The ATLAS and CMS experiments performed a large number of searches for SUSY during Run-1 of the LHC and, in the absence of a significant excess in any channel, exclusion limits on the masses of SUSY particles (sparticles) were calculated in numerous scenarios, usually in the context of the minimal supersymmetric Standard Model (MSSM) [13,14]. These scenarios include "high-scale" SUSY models such as mSUGRA [15][16][17] or GMSB [18][19][20], both of which specify a particular SUSY-breaking mechanism. Most searches also considered specific "simplified models", which attempt to capture the behaviour of a small number of kinematically accessible SUSY particles, often through considering one particular SUSY production process with a fixed decay chain.Although the high-scale and simplified model exclusions provide an easily interpretable picture of the sensitivity of analyses to specific areas of parameter space, they are far from -1 - JHEP09(2016)175a full exploration of the MSSM, which contains about 120 free parameters. The number of parameters is reduced i...

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The impact of priors and observables on parameter inferences in the constrained MSSM

Cited by 190 publications

References 69 publications

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

The Baryonic Tully–fisher Relation of Gas-Rich Galaxies as a Test of Λcdm and Mond

Dark matter interpretations of ATLAS searches for the electroweak production of supersymmetric particles in s = 8 $$ \sqrt{s}=8 $$ TeV proton-proton collisions

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