Speaker
Description
The future electron-positron colliders offer excellent facilities for SUSY
searches. With respect to previous e+e- colliders, they increase the luminosity
and centre-of-mass energy and improve the technologies, while, with
respect to hadron colliders, they offer a cleaner environment, a known
initial state and a triggerless operation of the detectors.
Moreover, in contrast to hadron colliders, they are very well adapted to the
colour neutral SUSY sector, one of the most relevant for SUSY and explanation
of the main problemas of the Standard Model and expected, for theoretical
reasons and from results of the global fits, to have sufficiently light mass
to be observable at these colliders.
Among the colourless SUSY particles, the superpartner of the tau-lepton,
the stau, is one of the most interesting ones in SUSY searches.
The stau is likely to be the lightest of the sfermions, so the first SUSY
particle that could be observed, and it can, for good reasons, be regarded
as the worst and thus most general scenario for the searches: If one can
find the stau, then any alternative next-to-lightest SUSY particle (NLSP)
will also be findable.
In this contribution, a detailed study of the direct stau pair-production at
the International Linear Collider (ILC) has been performed, showing the
capability of this collider for determining stau exclusion/discovery limits
in a model-independent way.
The studies were done using the full detector simulation and reconstruction
procedures of the International Large Detector concept (ILD) at the ILC. The
simulation included all SM backgrounds, as well as the beam induced ones.
A detailed study of the effect of beam induced backgrounds, as
overlay-on-physics and - for the first time - overlay-only events, in the stau
limits was performed. The analysis of the worst mixing for stau searches at
the ILC conditions is also included.
We are confident that this analysis confirms that at a linear e+e- collider,
SUSY will be discovered if the NLSP mass is up to just a few GeV below
the kinematic limit of the collider.
| Collaboration / Activity | FTX-SLB SUSY searches |
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