Heavy standard model-like Higgs boson and a light stop from Yukawa-deflected gauge mediation

Abstract

To obtain a SM-like Higgs boson around 125 GeV in the Minimal Supersymmetric Standard Model with minimal gauge mediation of supersymmetry breaking (GMSB), a heavy stop at multiTeV level is needed and incurs severe fine-tuning, which can be ameliorated in the framework of the deformed GMSB with visible-hidden direct Yukawa interactions (YGMSB). We examine some general features of the YGMSB and focus on the scenario with Higgs-messenger couplings (H−YGMSB) which can automatically maintain the minimal flavor violation (MFV). It turns out that such a Yukawa mediation scenario can give a large −A t and −m 2 t L,R , leading to a maximal stop mixing, and thus can readily give a light stop (t 1 ) below the TeV scale. However, we find that in the minimal H−YGMSB scenario, m 2 Hu is too large and then the electroweak symmetry breaking is inconsistent with the large stop mixing. To solve this problem, we modify the hidden sectors in two ways, adding a new strong gauge dynamics or introducing the (10, 10) messengers.For each case we present some numerical study.

Signs of tops from highly mixed stops

“…We study the constraint imposed on such models by flavour observables and by the requirement of a viable Higgs mass. A similar extension of the gauge mediation scheme has been recently studied in several different contexts [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], for instance with the purposes of addressing the µ − B µ problem, of raising the Higgs mass and/or investigating their possibly unusual flavor patterns.…”

Higgs phenomenology in the Minimal Dilaton Model after Run I of the LHC

“…So far the mass of the boson is rather precisely determined to be around 125 GeV, and its other properties, albeit with large experimental uncertainties, agree with those of the Higgs boson predicted by the Standard Model (SM) [4,5]. Nevertheless, the deficiencies of the SM itself motivate the interpretation of the Higgs-like boson in new physics frameworks such as low energy supersymmetric models [6][7][8][9][10], and as shown by numerous studies, fits to the Higgs data in new physics models can be as good as that in the SM.…”

Focus point supersymmetry in extended gauge mediation

“…refs. [105,[109][110][111][112][113][114][115][116][117][118][119]. However, in this paper we assume that the gaugino masses and all A-terms are suppressed through conformal sequestering as discussed below.…”