Muon g − 2 vs LHC in supersymmetric models

Endo, Motoi; Hamaguchi, Koichi; Iwamoto, Sho; Yoshinaga, Takahiro

doi:10.1007/jhep01(2014)123

Cited by 78 publications

(89 citation statements)

References 72 publications

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“…The points are similar to the scenarios studied in Ref. [20], where it was also shown that such parameter choices, together with the squark masses defined below, are compatible with current LHC data. We use a notation similar to Ref.…”

Section: Overview Of Susy Contributions To a µsupporting

confidence: 70%

“…Many recently proposed models which stay within the MSSM framework involve rather split spectra, e.g. heavy coloured, light non-coloured SUSY particles [20][21][22][23], heavy third family, lighter first and second family [24], non-universal gaugino masses [25,26], large Higgsino masses and large stop mixing from more generic gauge mediation [27].…”

Section: Introductionmentioning

confidence: 99%

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Non-decoupling two-loop corrections to (g−2)μ from fermion/sfermion loops in the MSSM

Fargnoli¹,

Gnendiger²,

Paßehr³

et al. 2013

Physics Letters B

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Two-loop contributions to the muon (g − 2) from fermion/sfermion loops in the MSSM are presented, and an overview of the full MSSM prediction for (g − 2) is given with emphasis on the behaviour in scenarios which are compatible with LHC data, including scenarios with large mass splittings. Compared to all previously known two-loop contributions, the fermion/sfermion-loop contributions can yield the largest numerical results. The new contributions contain the important universal quantities ∆α and ∆ρ, and for large sfermion masses the contributions are non-decoupling and logarithmically enhanced. We find up to 15% (30%) corrections for sfermion masses in the 20 TeV (1000 TeV) range.

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Section: Overview Of Susy Contributions To a µsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Non-decoupling two-loop corrections to (g−2)μ from fermion/sfermion loops in the MSSM

Fargnoli¹,

Gnendiger²,

Paßehr³

et al. 2013

Physics Letters B

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“…(3.12) because µ is large. This is connected with the larger contribution from the neutralino-smuon part of the diagrams for a SUSY µ [129][130][131]. The contributions from the above type of diagram is more dominant for tan β = 20 where µ is much larger than the case of tan β = 40.…”

Section: Muon G −mentioning

confidence: 83%

“…The point for tan β = 20 in Region-I corresponding to smaller µ satisfies a SUSY µ constraint of eq. (3.12) principally because of smaller lighter chargino mass [129][130][131]. For the Region -I point corresponding to tan β = 40, there is a natural enhancement of a SUSY µ due to larger tan β.…”

Section: Muon G −mentioning

confidence: 99%

“…At one-loop level, the supersymmetric contributions to a µ with a µ = 1 2 (g − 2) µ [123][124][125][126][127][128] originate from chargino-sneutrino and neutralino-smuon loops. Large contributions may come from neutralino-smuon loops when µ is large along with smaller slepton masses [129][130][131]. On the other hand, for small µ zones smaller masses of charginos would increase the supersymmetric contributions a SUSY µ to a µ .…”

Section: Muon G −mentioning

confidence: 99%

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Exploring MSSM for charge and color breaking and other constraints in the context of Higgs@125 GeV

Chattopadhyay

Dey

2014

J. High Energ. Phys.

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Exploring MSSM parameter space after the discovery of Higgs Boson at 125 GeV naturally demands large top-squark mixing or large trilinear coupling parameter A t in particular, so as to avoid excessively heavy squark, specially for the universal models like CMSSM. We study stability of electroweak symmetry breaking vacua in possible presence of deeper charge-color symmetry breaking minima within MSSM. Besides stable vacua, we consider scenarios characterized by the presence of global CCB minima, with SM like charge and color conserving vacuum, having stability over cosmologically large lifetime (long-lived states). We allow vacuum expectation values for both stop as well as sbottom fields, since these belong to the third generation of sfermions with larger Yukawa couplings that have immediate effect on the tunneling time. Moreover, for large µ regions, radiative corrections to Higgs boson mass from bottom-squark loop is quite significant. Regions of MSSM parameters space become viable for large A t and large µ zones which are generically excluded via the traditional analytical CCB constraints. For a large value of tan β, safe vacua associated with large values of |µ| and |A t | are predominantly long-lived and may be associated with relatively light stop masses. We also identify low µ regions associated with long-lived states. Both the above zones can be friendly to muon g − 2 constraint. We also impose constraints from Br(B → X s γ) and Br(B s → µ + µ − ). We do the analysis for a moderate and a large tan β. We choose an example parameter point in the gaugino mass plane of M 1 , M 2 that satisfies the dark matter constraints, basically a decoupled sector with respect to CCB.

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Search for the EWK Production of Compressed SUSY with Soft Leptons

Resseguie

2020

Springer Theses

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Muon g − 2 vs LHC in supersymmetric models

Cited by 78 publications

References 72 publications

Non-decoupling two-loop corrections to (g−2)μ from fermion/sfermion loops in the MSSM

Non-decoupling two-loop corrections to (g−2)μ from fermion/sfermion loops in the MSSM

Exploring MSSM for charge and color breaking and other constraints in the context of Higgs@125 GeV

Search for the EWK Production of Compressed SUSY with Soft Leptons

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