The following email has been sent to Prof. MAZUMDAR, Kajari:

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Dear Kajari Mazumdar,

The submission of your abstract has been successfully processed.

Abstract submitted: https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts.

Status of your abstract: https://indico.cern.ch/event/192695/call- for-abstracts/209/.

See below a detailed summary of your submitted abstract:

Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics

Submitted by: Prof. MAZUMDAR, Kajari

Submitted on: 10 February 2014 12:03

Title: Preparing Electrons and Photons High Level Trigger Reconstruction in CMS for Run II data taking

Abstract content The CMS experiment has been designed with a 2-level trigger system. The first level is implemented on custom-designed electronics. The second level is the so-called High Level Trigger (HLT), a streamlined version of the CMS offline reconstruction software running on a computer farm. For Run II of the Large Hadron Collider, the increase in center-of-mass energy and luminosity will raise the event rate to a level challenging for the HLT algorithm. New approaches have been studied to keep the HLT output rate manageable while maintaining thresholds low enough to cover physics analyses. The strategy mainly relies on porting online the ingredients that have been successfully applied in the offline reconstruction, thus allowing to move HLT selection closer to offline cuts. We will present such improvements in the definitions of HLT electrons and photons, focusing in particular on the deployment of a new superclustering algorithm allowing pileup mitigation, a new Particle-Flow-based isolation replacing the less powerful detector-based approach, and an electron-dedicated track fitting algorithm based on a Gaussian Sum Filter.

Summary

Primary Authors: Prof. MAZUMDAR, Kajari (Tata Inst. of Fundamental Research (IN)) kajari.mazumdar@cern.ch

Co-authors:

Abstract presenters: Prof. MAZUMDAR, Kajari

Track classification: Data-processing: 3b) Trigger and Data Acquisition Systems

Presentation type: --not specified--

Comments: Kajari Mazumdar submits the abstract on behalf of Conference committee of CMS collaboration at LHC. Name of the actual presenter will be specified later