Detecting metastable staus and gravitinos at the ILC

Abstract

A study of various SUSY scenarios is presented in which the lightest supersymmetric particle is the gravitino $\sG$ and the next-to-lightest supersymmetric particle is a scalar tau $\stau$ with lifetimes ranging from seconds to years. Gravitinos are interesting dark matter candidates which can be produced in decays of heavier sparticles at the International Linear Collider (ILC), but remain undetected in direct searches of astrophysical experiments. We investigate the detection and measurement of metastable staus, which may be copiously produced at the ILC either directly or via cascade decays. A proper choice of the experimental conditions will allow one to stop large samples of staus in the calorimeters of the ILC detector and to study the subsequent decays $\stau\toτ\sG$. Detailed simulations show that the properties of the stau and the gravitino, such as stau mass and lifetime and gravitino mass, can be accurately determined at a future ILC and may provide direct access to the gravitational coupling, respectively Planck scale.

13 pages, 5 figures

References in corpus (2)

• Slepton Production at e+e- and e-e- Linear Colliders
• SIMDET - Version 4 A Parametric Monte Carlo for a TESLA Detector

Cited by in corpus (17)

• Dark Matter Candidates: A Ten-Point Test
• Dark Matter Candidates - Axions, Neutralinos, Gravitinos, and Axinos
• Stau-catalyzed ${}^6$Li Production in Big-Bang Nucleosynthesis
• Sweet Spot Supersymmetry
• The number density of a charged relic
• Phenomenology of the constrained NMSSM
• Collider signatures of gravitino dark matter with a sneutrino NLSP
• Measuring lifetimes of long-lived charged massive particles stopped in LHC detectors
• Probing the Reheating Temperature at Colliders and with Primordial Nucleosynthesis
• Electroweak Contributions to Thermal Gravitino Production
• Long-lived staus from strong production in a simplified model approach
• Upper Limits on the Peccei-Quinn Scale and on the Reheating Temperature in Axino Dark Matter Scenarios
• Determining the mass for an ultralight gravitino at LHC
• Determining the Mass for a Light Gravitino
• The long-lived stau as a thermal relic
• Complementarity of the CERN Large Hadron Collider and the $e^{+}{e}^{-}$ International Linear Collider
• Complementarity of LHC and ILC