Gravitinos and hidden Supersymmetry at the LHC - Universität ...

List of Figures
2.1 Stability and perturbativity bounds on the Higgs mass. . . . . . . . . . . . . 12
2.2 Mass spectra of supersymmetric particles in different scenarios of supersymmetry
breaking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.1 Froggatt-Nielsen fields generating effective Yukawa coupling. . . . . . . . . . . 53
4.1 Supersymmetric µ parameter and the soft breaking term B in supergravity
models as functions of the bino mass M 1 . . . . . . . . . . . . . . . . . . . . . 57
4.2 Gravitino decay into photon and neutrino. . . . . . . . . . . . . . . . . . . . . 62
4.3 Neutralino decays into neutrino and Z boson, charged lepton and W boson,
and neutrino and the lightest Higgs boson. . . . . . . . . . . . . . . . . . . . . 65
4.4 Two functions of the neutralino mass m χ 0
1
which demonstrate that the decoupling
limit is satisfied for the boundary conditions giving bino-like neutralino
NLSP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.5 Sample Feynman diagram for the single resonant s-channel production of the
˜¯d squark in e − p collisions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.6 Exclusion limits on the λ ′ 113 coupling from the H1 experiment at HERA. . . . 76
4.7 Feynman diagrams for the two R-parity violating processes under consideration
by the ATLAS collaboration. . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
4.8 Exclusion limits on R-parity violating couplings from the ATLAS experiment
at LHC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4.9 Observed and expected 95% C.L .exclusion limits from ATLAS in bilinear R-
parity violation model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
4.10 Upper bounds on λ ′2 × BR(ẽ i , /˜ν i → jj) derived from LHC results on dijet
resonance searches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
4.11 Upper limits on the couplings (a) λ ′ 211 and (b) λ′ 222 derived from the ATLAS
search for anomalous production of prompt like-sign muon pairs assuming a
bino-like neutralino. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.12 Bounds on the gravitino lifetime from observations of charged cosmic rays and
sensitivity of forthcoming experiments. . . . . . . . . . . . . . . . . . . . . . . 83
4.13 Bounds on the gravitino lifetime from observations of the diffuse extragalactic
gamma-ray background and from photon line searches. . . . . . . . . . . . . . 84
4.14 Phase space suppression factors and branching ratios of a bino-like neutralino
as functions of the neutralino mass. . . . . . . . . . . . . . . . . . . . . . . . . 88
4.15 Higgsino-like neutralino branching ratios as functions of the neutralino mass. 90
4.16 The ˜τ-mixing angle sin 2 (θ τ ) as a function of the lightest ˜τ-mass m˜τ1 . . . . . . 91
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