Embedding the 125 GeV Higgs boson measured at the LHC in an effective MSSM: Possible implications for neutralino dark matter

Scopel, S.; Fornengo, N.; Bottino, A.

doi:10.1103/physrevd.88.023506

Cited by 17 publications

(9 citation statements)

References 104 publications

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“…Higher quenching factors lead to shift of WIMPs mass in the DAMA measurements to lower values of 10 GeV (see e.g. [19][20][21]). It is also interesting to note that in works [22], where a combined fit of evidences for DM particles in the DAMA, CoGeNT, CRESST, and CDMS-II-Si experiments is described, one of the procedures allows QF Na to be a free parameter in the range of 0.2 − 0.6.…”

Section: Resultsmentioning

confidence: 99%

Semi-empirical calculation of quenching factors for scintillators: new results

Tretyak

2014

EPJ Web of Conferences

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Section: Resultsmentioning

confidence: 99%

Semi-empirical calculation of quenching factors for scintillators: new results

Tretyak

2014

EPJ Web of Conferences

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“…In principle, it is possible for the heavier CP -even Higgs, H, to be SM-like with mass ∼ 126 GeV, in the so-called nondecoupling regime of the model. However, such a possibility is confined to a very fine-tuned region of the parameter space, which is essentially ruled out by the direct search limits on the lightest Higgs h and the pseudo-scalar Higgs A and other experimental constraints from flavor physics [10,96,97,98]. Hence we do not explore such a possibility here.…”

Section: Statistical Treatment Of Experimental Constraintsmentioning

confidence: 99%

Dark matter and collider signatures of the MSSM

et al. 2013

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We explore the MSSM with 9 free parameters (p9MSSM) that have been selected as a minimum set that allows an investigation of neutralino dark matter and collider signatures while maintaining consistency with several constraints. These include measurement of the dark matter relic density from PLANCK, main properties of the discovered Higgs boson, LHC direct SUSY searches, recent evidence for a Standard Model-like BR (B s → µ + µ − ), and the measurement of δ (g − 2) µ , plus a number of other electroweak and flavor physics constraints. We perform a simulation of two LHC direct SUSY searches at √ s = 8 TeV: the CMS inclusive α T search for squarks and gluinos and the CMS electroweak production search with 3l+E miss T in the final state. We use the latter to identify the regions of the parameter space, consistent at 2σ with δ (g − 2) µ , that are not excluded by the direct limits from the electroweak production. We find that they correspond to a neutralino mass in the window 200 GeV m χ 500 GeV. We also implement the likelihood for the XENON100 exclusion bound, in which we consider for the first time the impact of a recent determination of the Σ πN term from CHAOS data, Σ πN = 43 ± 12 MeV. We show that in light of this measurement, the present statistical impact of the XENON100 bound is greatly reduced, although future sensitivities of the LUX and XENON1T experiments will have decisive impact on the mixed bino/higgsino composition of the neutralino. We point out some tension between the constraints from δ (g − 2) µ and XENON100. Finally, we present prospects for various indirect searches of dark matter, namely γ-ray fluxes from dSphs and the Galactic Center at Fermi-LAT, and the positron flux at AMS02. We also show the 5-year sensitivity on the spin-dependent neutralino-proton cross section due to neutrino fluxes from the Sun at IceCube. * On leave of absence from the University of Sheffield, U.K.

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“…On the other hand, while it is also possible to have a ∼125 GeV H, the heavier CP-even Higgs boson of the MSSM, this can only be achieved for 95 GeV < m A < 110 GeV, in a tiny portion of the 'non-decoupling regime'. This region is, moreover, disfavored by the constraints from flavor physics [37,38].…”

Section: γγ Decay Of the Pseudoscalarmentioning

confidence: 99%

Simultaneous enhancement inγγ,bb¯andτ+τ
Munir
¹
,
Roszkowski
²
,
Trojanowski
³

2013
Phys. Rev. D
22
0
21
0
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We propose an experimental test of a scenario in the Next-to-Minimal Supersymmetric Standard Model in which both the lightest scalar and the lightest pseudoscalar Higgs bosons have masses around 125 GeV. The pseudoscalar can contribute significantly to the γγ rate at the LHC due to light Higgsino-like charginos in its effective one-loop coupling to two photons. Such charginos are obtained for small values of the µ eff parameter which also results in enhanced bb and τ + τ − rates compared to those expected for a Standard Model Higgs boson. This scenario should result in a clear discrepancy between the observed rates in these three decay channels and those in the W W and ZZ channels, since the pseudoscalar does not couple to the W and Z bosons. However, in the dominant gluon fusion production mode the pseudoscalar will stay hidden behind the SM-like scalar Higgs boson and in order for it to be observable the associated bbh production mode has to be considered, the cross section for which is tiny in the Standard Model but tan β-enhanced in supersymmetry. We analyze the constrained NMSSM with nonuniversal Higgs sector parameters and identify regions of its parameter space where the lightest pseudoscalar with mass around 125 GeV and strongly enhanced γγ (up to 60%), bb and τ + τ − rates in the bbh mode can be obtained. * On leave of absence from the University of Sheffield, UK.1 by the CMS have now fallen down to SM-like values, 0.78 ± 0.27 and 0.91 +0.30 −0.24 in the γγ and ZZ decay channels, respectively, with the mean value of the boson mass being 125.6 ± 0.64 GeV.The ATLAS collaboration, on the other hand, still reports sizable excesses, σ/σ SM = 1.65± 0.35 in the γγ channel with the mass measurement yielding 126.8 ± 0.73 GeV, and σ/σ SM = 1.7 ± 0.5 in the ZZ channel with mass at 124.3 +0.55 −0.4 GeV. Moreover, broad peaks consistent with a 125 GeV boson have now also been observed in the H → W W → 2l2ν channel in the two detectors. Importantly, the best-fit signal strength in this channel is SM-like according to both CMS and ATLAS, with a measured value of 0.76 ± 0.21 at the former and of 1.01 ± 0.31 at the latter. In the bb decay channel, although no significant excess has been observed above the SM background at either CMS or ATLAS, fitted signal strength values at m h = 125 GeV have been obtained by the two collaborations for some individual Higgs boson production modes. The best-fit values provided by the CMS collaboration read 0.7 ± 1.4 for vector boson fusion (VBF), 1.0 +0.5 −0.5 for Higgs-strahlung off a vector boson (W h/Zh) and 0.74 +1.34 −1.30 for associated production off top quarks (tth). The ATLAS collaboration has recently provided a fitted value of 0.2 ± 0.64 for the W h/Zh production mode only. In the τ + τ − channel an excess of events over a broad m h range was reported by the CMS collaboration with a best-fit σ/σ SM = 1.1 ± 0.4 at 125 GeV. At ATLAS, however, no excess has so far been observed in this channel also and a fitted value at m h = 125 GeV, which is SM-like but with a very large error,...

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Embedding the 125 GeV Higgs boson measured at the LHC in an effective MSSM: Possible implications for neutralino dark matter

Cited by 17 publications

References 104 publications

Semi-empirical calculation of quenching factors for scintillators: new results

Semi-empirical calculation of quenching factors for scintillators: new results

Dark matter and collider signatures of the MSSM

Simultaneous enhancement inγγ,bb¯andτ+τ
Munir
¹
,
Roszkowski
²
,
Trojanowski
³

2013
Phys. Rev. D
22
0
21
0
View full text Add to dashboard Cite

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Embedding the 125 GeV Higgs boson measured at the LHC in an effective MSSM: Possible implications for neutralino dark matter

Cited by 17 publications

References 104 publications

Semi-empirical calculation of quenching factors for scintillators: new results

Semi-empirical calculation of quenching factors for scintillators: new results

Dark matter and collider signatures of the MSSM

Simultaneous enhancement inγγ,bb¯andτ+τMunir1, Roszkowski2, Trojanowski3 2013Phys. Rev. D220210View full textAdd to dashboardCite

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About

Simultaneous enhancement inγγ,bb¯andτ+τ
Munir
¹
,
Roszkowski
²
,
Trojanowski
³

2013
Phys. Rev. D
22
0
21
0
View full text Add to dashboard Cite