PoS - Proceedings of Science
Volume 287 - The 25th International workshop on vertex detectors (Vertex 2016) - Session: Vertexing at future accelerators
The ILC Vertex Detector requirements
A.G. Besson* and  On behalf of SiD and ILD vertex detector R&D groups
Full text: pdf
Pre-published on: March 02, 2017
Published on: August 03, 2017
After few decades of R&D, the International Linear Collider (ILC) project has reached a level
of maturity proving the feasibility of the machine and of the detectors. The ILC physics goals
cover a very wide and ambitious program including top-quark quark physics, electroweak precision
measurements, direct and indirect searches beyond the Standard Model (BSM) like SUSY,
dark matter manifestations, exotic particles and phenomena, etc., and an extensive Higgs physics
program covering mass, couplings to fermions and bosons, quantum numbers and total width
measurements. These measurements are expected to reach an unprecedented level of precision,
which will allow probing physics BSM, since typical deviations from the Standard Model are expected
to be within the ILC sensitivity. To accomplish the ambitious physics program of the ILC,
the vertex detector will be essential for providing the necessary physics performances in terms of
flavour tagging, displaced vertex charge determination and low momentum tracking capabilities.
Taking advantage of the much less demanding running conditions at the ILC than at hadron colliders
like LHC, the vertex detector is expected to reach particularly high performances as far as
spatial resolution and material budget are concerned (typical impact parameter resolution of the
order of 5 microns and material budget in the order of 0.15-0.2 % of radiation length per layer). In
addition, the particular time structure of the beams has major consequences on the specifications
of the detectors and their read-out architecture. Finally, the beam related background of the ILC,
which translates into a high rate of low momentum-$e^{-}e^{+}$ pairs hitting the vertex detector, drives
the expected occupancy (and the related necessary read-out speed) as well as the radiation load.
This article focuses on the vertex detector requirements driven from the stringent physics and experimental
constraints of the ILC. Wherever different, the aspects to each detector concepts (SiD
and ILD) are discussed.
DOI: https://doi.org/10.22323/1.287.0047
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