Speaker
Hans-Ulrich Martyn
(RWTH Aachen & DESY)
Description
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 $\stau\to\tau\sG$. 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.
Author
Hans-Ulrich Martyn
(RWTH Aachen & DESY)
