Weighing the Light Gravitino Mass with Weak Lensing Surveys

Abstract

We explore the discovery potential of light gravitino mass m_{3/2} by combining future cosmology surveys and collider experiments. The former probe the imprint of light gravitinos in the cosmic matter density field, whereas the latter search signatures of a supersymmetry breaking mechanism. Free-streaming of light gravitinos suppresses the density fluctuations at galactic and sub-galactic length scales, where weak gravitational lensing can be used as a powerful probe. We perform numerical simulations of structure formation to quantify the effect. We then run realistic ray-tracing simulations of gravitational lensing to measure the cosmic shear in models with light gravitino. We forecast the possible reach of future wide-field surveys by Fisher analysis; the light gravitino mass can be determined with an accuracy of m_{3/2}=4\pm 1 eV by a combination of the Hyper Suprime Cam survey and cosmic microwave background anisotropy data obtained by Planck satellite. The corresponding accuracy to be obtained by the future Large Synoptic Survey Telescope is δm_{3/2}=0.6 eV. Data from experiments at Large Hadron Collider at 14 TeV will provide constraint at m_{3/2} \simeq 5 eV in the minimal framework of gauge-mediated supersymmetry breaking (GMSB) model. We conclude that a large class of the GMSB model can be tested by combining the cosmological observations and the collider experiments.

22 pages, 9 figures

References in corpus (12)

• Revising the Halofit Model for the Nonlinear Matter Power Spectrum
• CFHTLenS: Combined probe cosmological model comparison using 2D weak gravitational lensing
• Cosmology with Weak Lensing Surveys
• The Effect of Thermal Neutrino Motion on the Non-linear Cosmological Matter Power Spectrum
• Impact of massive neutrinos on nonlinear matter power spectrum
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: weighing the neutrino mass using the galaxy power spectrum of the CMASS sample
• Structure of Dark Matter Halos in Warm Dark Matter models and in models with Long-Lived Charged Massive Particles
• Search for Supersymmetry in Events with Large Missing Transverse Momentum, Jets, and at Least One Tau Lepton in 7 TeV Proton-Proton Collision Data with the ATLAS Detector
• Upperbound on Squark Masses in Gauge-Mediation Model with Light Gravitino
• Constraining Light Gravitino Mass from Cosmic Microwave Background
• Stability of Metastable Vacua in Gauge Mediated SUSY Breaking Models with Ultra Light Gravitino
• Studying Very Light Gravitino at the ILC

Cited by in corpus (4)

• Mock galaxy shape catalogs in the Subaru Hyper Suprime-Cam Survey
• Cosmological Constraint on the Light Gravitino Mass from CMB Lensing and Cosmic Shear
• Manifesting hidden dynamics of a sub-component dark matter
• Search for new phenomena in final states with photons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector