Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e + e −→π + π − cross section data from BABAR

We investigate models of supersymmetric grand unification based on the gauge group SU (5). We consider models with non-universal gaugino masses and confront them with low energy constraints, including the Higgs boson mass and the Dark Matter relic density. We also discuss fine-tuning and show the effect of not including the µ-parameter into fine tuning determinations. With this relaxation, we find viable scenarios with low fine tuning and study some model choices for gaugino mass ratios. We demonstrate that some orbifold inspired models may provide low fine-tuning and the preferred relic abundance of Dark Matter while evading all experimental constraints. We present benchmarks that should be explored at the LHC and future colliders.

Section: Experimental Constraintsmentioning

confidence: 99%

Supersymmetric SU(5) grand unification for a post Higgs boson era

Miller

Morais

2013

“…The precise measurement of the muon anomalous magnetic moment (the muon g − 2) [3,4] has shown discrepancy from the SM prediction [5][6][7][8][9][10]. With dedicated efforts to determine hadronic contributions precisely, the latest result is ∆a µ ≡ a µ (exp) − a µ (SM) = (26.1 ± 8.0) × 10 −10 ,…”

Section: Introductionmentioning

confidence: 99%

Muon g − 2 vs LHC in supersymmetric models

Endo

Hamaguchi

Iwamoto

et al. 2014

There is more than 3σ deviation between the experimental and theoretical results of the muon g − 2. When interpreted in SUSY extensions of the SM, this anomaly suggests that some of the SUSY particles have a mass of order 100 GeV. We study searches for those particles at the LHC with particular attention to the muon g − 2. In particular, the recent results on the searches for the non-colored SUSY particles are investigated in the parameter region where the muon g − 2 is explained. The analysis is independent of details of the SUSY models. Future prospects of the collider searches are also discussed.

“…For instance, refs. [107,108] estimate ∆aµ ≃ −(2.5 ± 0.8) × 10 −9 using e + e − data or ∆aµ ≃ −(1.6 ± 0.8) × 10 −9 using τ data.…”

Section: Phenomenological Viability Mssm Spectrum and Lhc Searchesmentioning

confidence: 99%

Beyond the standard seesaw: neutrino masses from Kähler operators and broken supersymmetry

Brignole

Joaquim

Rossi

2010

We investigate supersymmetric scenarios in which neutrino masses are generated by effective d = 6 operators in the Kähler potential, rather than by the standard d = 5 superpotential operator. First, we discuss some general features of such effective operators, also including SUSY-breaking insertions, and compute the relevant renormalization group equations. Contributions to neutrino masses arise at low energy both at the tree level and through finite threshold corrections. In the second part we present simple explicit realizations in which those Kähler operators arise by integrating out heavy SU(2) W triplets, as in the type II seesaw. Distinct scenarios emerge, depending on the mechanism and the scale of SUSY-breaking mediation. In particular, we propose an appealing and economical picture in which the heavy seesaw mediators are also messengers of SUSY breaking. In this case, strong correlations exist among neutrino parameters, sparticle and Higgs masses, as well as lepton flavour violating processes. Hence, this scenario can be tested at highenergy colliders, such as the LHC, and at lower energy experiments that measure neutrino parameters or search for rare lepton decays.