servicex

What problem does it solve?

ServiceX query construction for ATLAS xAOD data (PHYSLITE/PHYS) often requires careful dataset selection, object and event filtering, and delivering results in a consistent structure. This Skill provides concise patterns, best practices, and practical references to speed up development and debugging.

Core Features & Use Cases

• Guidance on building top-level Selects for collections and singletons, applying nested Where filters, and producing a single dictionary of outputs.
• Step-by-step workflow examples for PHYSLITE and PHYS OpenData datasets, including how to classify datasets, choose appropriate queries, and handle unit conversions.
• Reusable snippets and references to xAOD data models, hints for common pitfalls, and a ready-to-adapt end-to-end example.

Quick Start

Create a minimal ServiceX query against a PHYSLITE dataset to fetch Jet pT using FuncADLQueryPHYSLITE and deliver the results.