Phenomenology of Minimal Unified Tree Level Gauge Mediation at the LHC

A search for supersymmetry (SUSY) is presented where at least one Higgs boson is produced and decays to two photons in the decay chains of pair-produced SUSY particles. Two analysis strategies are pursued: one focused on strong SUSY production and the other focused on electroweak SUSY production. The presence of charged leptons, additional Higgs boson candidates, and various kinematic variables are used to categorize events into search regions that are sensitive to different SUSY scenarios. The results are based on data from proton-proton collisions at the Large Hadron Collider at a center-of-mass energy of 13 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 77.5 fb −1. No statistically significant excess of events is observed relative to the standard model expectations. We exclude bottom squark pair production for bottom squark masses below 530 GeV and a lightest neutralino mass of 1 GeV; wino-like chargino-neutralino production in gauge-mediated SUSY breaking (GMSB) for chargino and neutralino masses below 235 GeV with a gravitino mass of 1 GeV; and higgsino-like chargino-neutralino production in GMSB, where the neutralino decays exclusively to a Higgs boson and a gravitino for neutralino masses below 290 GeV.

Section: Jhep11(2019)109mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Search for supersymmetry using Higgs boson to diphoton decays at $$ \sqrt{s} $$ = 13 TeV

Sirunyan¹,

Tumasyan²,

Adam³

et al. 2019

“…But the relation (7) implies that at least one of the soft terms m 2 (10 1,1 ), m 2 (5 −3,1 ), m 2 (5 2,−2 ) must be negative. Since we require that m 2 (10 1,1 ) is positive, either m 2 (5 −3,1 ) or m 2 (5 2,−2 ) can be positive.…”

Section: General Frameworkmentioning

confidence: 99%

Extended tree-level gauge mediation

Monaco

Nardecchia

Romanino

et al. 2011

Self Cite

Tree-level gauge mediation (TGM) is a scenario of SUSY breaking in which the tree-level exchange of heavy (possibly GUT) vector fields generates flavor-universal sfermion masses. In this work we extend this framework to the case of E 6 that is the natural extension of the minimal case studied so far. Despite the number of possible E 6 subgroups containing G SM is large (we list all rank 6 subgroups), there are only three different cases corresponding to the number of vector messengers. As a robust prediction we find that sfermion masses are SU(5) invariant at the GUT scale, even if the gauge group does not contain SU(5). If SUSY breaking is mediated purely by the U(1) generator that commutes with SO(10) we obtain universal sfermion masses and thus can derive the CMSSM boundary conditions in a novel scenario.

“…In this case the strongest BBN bounds are given by the formation of bound states with Helium nuclei which can alter the primordial abundance of Lithium. This process is referred as catalyzed BBN [17,18] and implies an upper bound of around 5 × 10 3 s on the stau lifetime 6 . Given the rate Eq.…”

Section: So(10) Tree Level Gauge Mediationmentioning

confidence: 99%

“…We are not taking into account here the effect of having a hierarchical messenger spectrum, an analysis of this scenario will be presented in Ref [6]…”

mentioning

confidence: 99%

Gravitino Dark Matter in Tree Level Gauge Mediation with and without R-parity

Arcadi¹,

Luzio²,

Nardecchia³

2011

Abstract:We investigate the cosmological aspects of Tree Level Gauge Mediation, a recently proposed mechanism in which the breaking of supersymmetry is communicated to the soft scalar masses by extra gauge interactions at the tree level. Embedding the mechanism in a Grand Unified Theory and requiring the observability of sfermion masses at the Large Hadron Collider, it follows that the Lightest Supersymmetric Particle is a gravitino with a mass of the order of 10 GeV. The analysis in the presence of R-parity shows that a typical Tree Level Gauge Mediation spectrum leads to an overabundance of the Dark Matter relic density and a tension with the constraints from Big Bang Nucleosynthesis. This suggests to relax the exact conservation of the R-parity. The underlying SO(10) Grand Unified Theory together with the bounds from proton decay provide a rationale for considering only bilinear R-parity violating operators. We finally analyze the cosmological implications of this setup by identifying the phenomenologically viable regions of the parameter space.