1 / 3

Significant Challenges in ECAL/HCAL Tower Analysis: Missing Et and Event Filtering Strategies

This document discusses critical issues related to energy measurements in ECAL and HCAL towers, specifically addressing missing transverse energy (Et) and the significant drop in amplitude across various energy ranges (0-500 GeV). It highlights the necessity of filtering bad events characterized by excessive HCAL hits and proposes the creation of a hit-event blacklist to improve data quality. The insights presented, including past observations and statistical concerns, aim to facilitate further studies and enhancements in data handling and trigger rates in high-energy physics experiments.

lupita
Télécharger la présentation

Significant Challenges in ECAL/HCAL Tower Analysis: Missing Et and Event Filtering Strategies

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Title • ECAL+HCAL Tower • Et and missing Et • Pal Hidas • FNAL Batavia / RMKI Budapest

  2. High Et tail • 0-60 GeV • amplitude drops by 4 orders of magnitude • 60-500 GeV • 200 GeV is needed for drop by 1 magnitude • good events • ~100-300 HCAL hits • energy sum ~ 0.1-1.0 GeV • bad events • 1 extra giant HCAL hit, E ~1-5 GeV • come from GEANT ( bug / feature ?) • Shuichi sees them in the fz files so they come from cmsim

  3. Result & Way Out • missing Et trigger rate is fatally overestimated above 40 GeV • I think we saw this last year on hlt samples above 100 GeV • we did not see it on minimum bias because of low statistics of high Et • we need a filter • drop events of HCAL hits ( not digis) above ~0.1-1.0 GeV • one has to create a hit-event black list and fed it by the digi job • we should be able to flag those events in DB after digi production • I will try to setup a filter on digis on 1 to 3*3 tower energies • needs further studies on hlt

More Related