Upper bounds on sparticle masses from muon g − 2 and the Higgs mass and the complementarity of future colliders

Badziak, Marcin; Lalak, Zygmunt; Lewicki, Marek; Olechowski, Marek; Pokorski, S.

doi:10.1007/jhep03(2015)003

Cited by 28 publications

(20 citation statements)

References 88 publications

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“…On the other hand, in our scenario with large values of λ (and light stops), only small tan β (1 tan β 5) complies with the allowed range of Higgs mass. Hence it is difficult to satisfy the muon g−2 constraint [97,98] from within NMSSMTools (which allows for only a 2σ window about the measured central value) without requiring the smuon to be so light that it becomes the LSP. However, allowing for a ∼ 2.5σ downward fluctuation (i.e., only a smaller excess over the SM) could easily accommodate a suitably light smuon.…”

Section: Jhep09(2015)073mentioning

confidence: 99%

Two light stops in the NMSSM and the LHC

Beuria

Chatterjee

Datta

et al. 2015

J. High Energ. Phys.

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Abstract:We study the viability of having two relatively light top squarks ('stops') in the framework of the Next-to-Minimal Supersymmetric Standard Model (NMSSM). Such light stops render the NMSSM rather 'natural'. These are shown to be allowed by the relevant direct searches at the Large Hadron Collider (LHC) and to be compatible with the latest LHC results on the Higgs sector, other low energy electroweak constraints and recent constraints from the dark matter (DM) sector. We propose dedicated searches for such light stops at the LHC within a 'simplified' scenario that may have a bino-like or a singlino-like neutralino LSP as the DM candidate and point out various final states carrying the imprint of their collective presence. Under certain circumstances, in such a scenario, presence of two light stops may give rise to final states which are not so typical in their search. Thorough studies at the detector level reveal the status of such a scenario after the 8 TeV run of the LHC and shed light on the prospects of its 13 and 14 TeV runs. In favorable regions of the NMSSM parameter space, with low-lying spectra, signals with significance 5σ are possible with a few tens to a few hundreds of fb −1 of integrated luminosity in diverse final states.

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Section: Jhep09(2015)073mentioning

confidence: 99%

Two light stops in the NMSSM and the LHC

Beuria

Chatterjee

Datta

et al. 2015

J. High Energ. Phys.

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show abstract

“…There have been several recent attempts to resolve this discrepancy within the MSSM framework assuming non-universal SUSYbreaking (SSB) mass terms at M GUT for gauginos [9,10,11] or sfermions [12,13]. The novel features of our analysis include highlighting the composition of the neutralinos that resolves the (g − 2) µ anomaly and the corresponding signal predictions at the upcoming 14 TeV run of the LHC.…”

Section: Introductionmentioning

confidence: 93%

Neutralinos and sleptons at the LHC in light of muon(g−2)μ

et al. 2015

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We study the neutralinos and sleptons in multi-lepton final states at the LHC in light of (g − 2) µ anomaly. We scan the MSSM parameters relevant to (g − 2) µ and focus on three distinct cases with different neutralino compositions. The explanation of (g − 2) µ excess at 2σ range requires the smuon (μ 1 ) to be lighter than ∼ 500 (1000) GeV for tan β = 10 (50). Correspondingly the two lightest neutralinos,χ 0 1 ,χ 0 2 , have to be lighter than ∼ 300 (650) GeV and 900 (1500) GeV respectively. We explore the prospects of searching these light neutralinos and smuons at the LHC. The upcoming run of the LHC will be able to set 95% CL exclusion limit on Mχ0 2 (∼ 650 − 1300 GeV) and ml (∼ 670 − 775 GeV) with Mχ0

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“…This standard MSSM case is well known (for reviews see [40][41][42]; recent works are [43][44][45][46][47][48][49][50][51][52][53][54][55][56][57]), and it requires SUSY masses in the few-hundred GeV range in order to explain the deviation (1.1); the LHC experiments, however, start to exclude parts of the relevant parameter space [43,58]. Thus it is well motivated to ask whether SUSY can explain the deviation even if all SUSY masses are much higher, at the TeV scale.…”

Section: Jhep10(2015)026mentioning

confidence: 99%

Large muon (g − 2) with TeV-scale SUSY masses for tan β → ∞

Bach

Park

Stöckinger

et al. 2015

J. High Energ. Phys.

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Abstract:The muon anomalous magnetic moment a µ is investigated in the MSSM for tan β → ∞. This is an attractive example of radiative muon mass generation with completely different qualitative parameter dependence compared to the MSSM with the usual, finite tan β. The observed, positive difference between the experimental and Standard Model values can only be explained if there are mass splittings, such that bino contributions dominate over wino ones. The two most promising cases are characterized either by large Higgsino mass µ or by large left-handed smuon mass m L . The required mass splittings and the resulting a SUSY µ are studied in detail. It is shown that the current discrepancy in a µ can be explained even in cases where all SUSY masses are at the TeV scale. The paper also presents useful analytical formulas, approximations for limiting cases, and benchmark points.

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Upper bounds on sparticle masses from muon g − 2 and the Higgs mass and the complementarity of future colliders

Cited by 28 publications

References 88 publications

Two light stops in the NMSSM and the LHC

Two light stops in the NMSSM and the LHC

Neutralinos and sleptons at the LHC in light of muon(g−2)μ

Large muon (g − 2) with TeV-scale SUSY masses for tan β → ∞

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