Physics Analysis
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May 2008
– June 2012
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Actively working on and leading the Wʹ boson search
- Leading the W´ discovery effort for the 2011-12 Run by implementing a comprehensive search strategy, covering leptonic (μν, eν), hadronic (tb, ℓ Νℓ) and bosonic (WZ, Wγ) channels
- Recent public results include:
- Search for exotic resonances decaying into WZ/ZZ
in pp colliisons at √s=7 TeV. Most stringent limit
in the world with 2011 data [arXiv:1211.5779, JHEP02 (2013) 036]
- Search for exotic particles decaying in WZ in pp colliisons at √s=7 TeV. Most stringent limit in the world with 2011 data [arXiv:1206.0433, Phys. Rev. Lett. 109, 141801 (2012)]
- Search for leptonic decays of W' bosons in pp colliisons at √s=7 TeV. Most stringent limit in the world with 2011 data [arXiv:1204.4764, JHEP 08 (2012) 023]
- Search for a W' boson decaying to a muon and a neutrinoc in pp colliisons at √s=7 TeV. Most stringent limit in
the world with 2010 data (arXiv:1103.0030, Phys. Lett. B701, 160–179, 2011)
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Developed a novel method for the analytical description of the lepton (μ, e) pT spectrum in the context of Wʹ searches (CMS Analysis Note 2009/157). Method commissioned with first W→μν data for 2010 Summer conferences (CMS Conference Note PFT-10-003)
- Local research advisor for six PhD students (first CMS W→μν cross-section measurement and Wʹ searches)
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Deputy Trigger Coordinator
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July 2007 – June 2011
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- Coordinated preparation and deployment of several trigger menus for pp collision runs at 1E27 through 1E33 (√s=900 GeV, 2.36 TeV and 7 TeV). Overviewed the High-Level Trigger (HLT) commissioning with tens of millions of minimum bias events. HLT recorded more than one billion pp collision events in 2010 during the first LHC Run with minimal downtime. Collected datasets used in more than fifty papers published in refereed journals
- Coordinated the extensive testing of HLT with the preparation of trigger menus for cosmic runs (JINST 5:T03005,2010, e-Print: arXiv:0911.4889, Summer 2009). The menus were used to collect about 300M cosmic events for detector performance studies (documented in 24 refereed journals)
- Organised Trigger Reviews across CMS for the optimization of trigger menus (Winter 2008-09,CMS Note IN-2010/022)
- Planned trigger menus for large-scale MC productions (2007, 2008 CMS computing & software exercises). First HLT tests at CMS with realistic alignment/calibration detector conditions
- Worked on the revision of HLT data model for reduced memory footprint
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Online Selection Physics Group Convener
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May 2005 – June 2007
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- Coordinated the implementation of a realistic trigger menu (using simulated data produced in RAW format as expected from readout, the full Level-1 emulator and a large number of HLT paths) for the first time in CMS. Successfully demonstrated that the physics and CPU-performance of the HLT are fully consistent with the CMS physics program and resources. Report submitted to LHC Committee (CERN-LHCC 2007-021, LHCC-G-134)
- Overviewed the porting of HLT algorithms to new CMS software framework (CMSSW). Worked on HLT design (handling of partial data unpacking and regional reconstruction at HLT for improved CPU performance)
- Overviewed the compilation of a 2E33 trigger menu for Physics TDR volume 2. Editor of the trigger chapter (J.Phys.G34:995-1579, 2007, a paper with more than 500 citations)
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Physics & Data Quality Monitoring
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February 2005 – March 2007
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- Designed DQM infrastructure and worked as main developer. Implemented server-client networking, and libraries of monitoring elements, quality tests, alarms (15th International Conference CHEP 2006 Proceedings)
- Released first prototype to CMS, employed by subdetectors during Magnet Test (“Cosmic Challenge”, Fall 2006)
- Monitoring solution has been widely adopted across CMS (HLT, subdetectors, validation of software releases and physics MC production, data certification)
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