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The mini-DST: a high-level LCIO format

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 Added by Shin-Ichi Kawada
 Publication date 2021
  fields Physics
and research's language is English




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A new LCIO-based data format called mini-DST has been developed, which combines Particle Flow Object (PFO) and event-level information, including the output of the most important high-level reconstruction algorithms. Originally triggered by Snowmass 2021 studies, the mini-DST is useful for beginners as a starting point of an analysis. In this note, we discuss the basics and contents of the mini-DST, how to create the mini-DST file from fully simulated MC samples, and the limitations of mini-DST.



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Almost all groups involved in linear collider detector studies have their own simulation software framework. Using a common persistency scheme would allow to easily share results and compare reconstruction algorithms. We present such a persistency framework, called LCIO (Linear Collider I/O). The framework has to fulfill the requirements of the different groups today and be flexible enough to be adapted to future needs. To that end we define an `abstract object persistency layer that will be used by the applications. A first implementation, based on a sequential file format (SIO) is completely separated from the interface, thus allowing to support additional formats if necessary. The interface is defined with the AID (Abstract Interface Definition) tool from freehep.org that allows creation of Java and C++ code synchronously. In order to make use of legacy software a Fortran interface is also provided. We present the design and implementation of LCIO.
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