Global fits of the cMSSM including the first LHC and XENON100 data

Bertone, Gianfranco; Cerdeño, David G.; Fornasa, Mattia; Austri, Roberto Ruiz de; Strege, Charlotte; Trotta, Roberto

doi:10.1088/1475-7516/2012/01/015

Cited by 62 publications

(88 citation statements)

References 93 publications

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“…Technically, the methods employed to obtain the results presented in this paper differ in various aspects from our previous studies [58,68,69] and from those used in other global fits with LHC exclusions [70][71][72][73][74][75][76][77][78][79][80]. In contrast to our previous paper, the theoretical calculations no longer rely on the combination of codes in the Mastercode package 5 but make use of various individual codes for the different theoretical calculations (see section 2).…”

Section: Jhep06(2012)098mentioning

confidence: 97%

Constrained supersymmetry after two years of LHC data: a global view with Fittino

Bechtle

Bringmann²,

Desch

et al. 2012

J. High Energ. Phys.

126

144

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Abstract:We perform global fits to the parameters of the Constrained Minimal Supersymmetric Standard Model (CMSSM) and to a variant with non-universal Higgs masses (NUHM1). In addition to constraints from low-energy precision observables and the cosmological dark matter density, we take into account the LHC exclusions from searches in jets plus missing transverse energy signatures with about 5 fb −1 of integrated luminosity. We also include the most recent upper bound on the branching ratio B s → µµ from LHCb. Furthermore, constraints from and implications for direct and indirect dark matter searches are discussed. The best fit of the CMSSM prefers a light Higgs boson just above the experimentally excluded mass. We find that the description of the low-energy observables, (g − 2) µ in particular, and the non-observation of SUSY at the LHC become more and more incompatible within the CMSSM. A potential SM-like Higgs boson with mass around 126 GeV can barely be accommodated. Values for B(B s → µµ) just around the Standard Model prediction are naturally expected in the best fit region. The most-preferred region is not yet affected by limits on direct WIMP searches, but the next generation of experiments will probe this region. Finally, we discuss implications from fine-tuning for the best fit regions.

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Section: Jhep06(2012)098mentioning

confidence: 97%

Constrained supersymmetry after two years of LHC data: a global view with Fittino

Bechtle

Bringmann²,

Desch

et al. 2012

J. High Energ. Phys.

126

144

View full text Add to dashboard Cite

show abstract

“…The full likelihood function is the product of the individual Gaussian likelihoods associated to each piece of experimental data. In particular, for Xenon100 we use the likelihood defined in [66]. The LUX limit is applied as a step function only for the 2σ confidence level points.…”

Section: Sparticle Massesmentioning

confidence: 99%

Indirect and direct detection prospect for TeV dark matter in the nine parameter MSSM

et al. 2015

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“…The treatment of XENON100 data is described in detail in ref. [76]. The likelihood function is built as a Poisson distribution for observing N recoil events when N s (Θ) signal plus N b background events are expected.…”

Section: Jhep09(2016)175mentioning

confidence: 99%

“…An updated version of the likelihood function described in refs. [76,77] is used. For the spin-independent cross section, the LUX data from 85.3 live-days with a fiducial volume of 118 kg [71] is used, as this result became available in time to be included in the analysis.…”

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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Global fits of the cMSSM including the first LHC and XENON100 data

Cited by 62 publications

References 93 publications

Constrained supersymmetry after two years of LHC data: a global view with Fittino

Constrained supersymmetry after two years of LHC data: a global view with Fittino

Indirect and direct detection prospect for TeV dark matter in the nine parameter MSSM

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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