RequerimientosBasicosParaElDesarrolloDeLaFisicaEnElILD < ILC

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ILC.RequerimientosBasicosParaElDesarrolloDeLaFisicaEnElILDr1.1 - 18 Sep 2009 - 08:44 - Main.iglesiastopic end

---++ 0. *El detector ILD*


---+++ 0.e. Requerimientos basicos para el desarrollo de la fisica en el ILD (Performance Requirements)

The requirements and resulting challenges for detectors at the ILC are described in the ILC Reference Design Report, RDR [[http://arxiv.org/PS_cache/arxiv/pdf/0709/0709.1893v1.pdf]]. The ILC is designed to investigate in detail the mechanism of the *electroweak symmetry breaking*, and to search for and study *new physics at energy scales up to 1TeV*. In addition, the collider will provide a wealth of *information on Standard Model* (SM) physics,for example top physics, heavy flavour physics, and physics of the Z and W bosons. 

The requirements for a detector are, therefore, that *multi-jet final states*, typical for many physics channels, can be reconstructed with high accuracy. The jet energy resolution should be sufficiently good that *the hadronic decays of the W and Z can be separated*. 

This translates into a *jet energy resolution* of sigmaE/E around 3-4% (equivalent to 30%/sqrt_E at energies below 100GeV). This requirement is one of the most challenging for ILD and has a large impact on the design of the calorimeters. It also impacts *the way the tracking system is optimised*.

Nevertheless, the reconstruction of events with high precision benefits the ILD physics programme in several ways. A more precise detector will result in smaller systematic errors for many measurements, and thus will extend the ultimate physics reach of the ILC. In addition, a more precise detector implies that the luminosity delivered by the collider is used more efficiently, making it possible to reduce the overall running costs of the facility to reach a particular accuracy.

It is difficult to anticipate the full physics programme at a new facility before the physics of the energy regime where it will operate is known. A detector for the ILC therefore needs to be designed and optimised not only in view of a limited set of benchmark reactions, but also to be as versatile and as flexible as possible. 

Nevertheless the ILC community has defined a number of challenging *benchmark physics reactions* (see the document attached), which, to the best of our current knowledge, will form an important part of the physics programme at the ILC. The benchmark reactions stress the study of the Higgs boson and Supersymmetry (SUSY) as a model for a possible new physics scenario at the ILC. They also rely on excellent lepton and flavour tagging and probe the missing energy measurement capability of the detector. These reactions give only a flavour of the physics reach of the ILC.

-- Main.iglesias - 18 Sep 2009
   * [[%ATTACHURL%/Benchmark_Reactions_for_the_ILC_LOI.pdf][Benchmark_Reactions_for_the_ILC_LOI.pdf]]: Benchmark reactions for LOI of ILD

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