https://wiki.lhep.unibe.ch/index.php?action=history&feed=atom&title=BAT_SUSY_2011_-_TriggersBAT SUSY 2011 - Triggers - Revision history2026-05-14T09:22:14ZRevision history for this page on the wikiMediaWiki 1.43.8https://wiki.lhep.unibe.ch/index.php?title=BAT_SUSY_2011_-_Triggers&diff=115&oldid=prevLhep: 1 revision imported2015-03-18T07:49:24Z<p>1 revision imported</p>
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</td></tr></table>Lhephttps://wiki.lhep.unibe.ch/index.php?title=BAT_SUSY_2011_-_Triggers&diff=114&oldid=prevLhep: /* 2011 Triggers */2011-03-15T17:02:07Z<p><span class="autocomment">2011 Triggers</span></p>
<p><b>New page</b></p><div>===2011 Triggers===<br />
<br />
Goal is to study the 2011 lepton triggers and their effect on our <br />
cut flow. Efficiencies versus eta, pt, phi.<br />
<br />
To do:<br />
<ul><br />
<li>Previous studies ? </li><br />
Reproduce 2010 results with data and some MC signal.<br />
2010 main data trigger: e15_medium<br />
<li>Start with electrons, tools from egamma</li><br />
Electron triggers changing trigger cut thresholds can be reproduced from D3PDs using the egamma trigger tools:<br />
https://twiki.cern.ch/twiki/bin/viewauth/Atlas/TrigHypoCutTools<br />
<li> Study offline to electron trigger object matching </li><br />
<br />
</ul><br />
----<br />
<ul><br />
<li> Trigger notation </li><br />
L1 -> 1st level trigger (hardware)<br />
<br />
L2 -> 2nd level trigger (software, part of High Level Trigger (HLT) together with EF<br />
<br />
EF -> Event Filter, 3rd level trigger (software, part of HLT, code as similar to offline at possible) <br />
<br />
Ex.: e20_medium<br />
<br />
e -> electron<br />
<br />
20 -> minimum Et trigger threshold required at EF (EF= Event Filter, 3rd trigger level)<br />
<br />
medium -> EF cuts are the same than for offline electron IsEM medium identification.<br />
<br />
As a rule of thumb plateau is reached ~5GeV above the trigger cut. <br />
<br />
----<br />
<br />
Information on 2011 electron unprescaled triggers<br />
<li> e20_medium: </li><br />
<br />
Medium definition has changed with respect to 2011, 30% higher rejection.<br />
<br />
Trigger selection will be tightened with increasing luminosity (for sure after peak luminosity goes above ~1e33) the so-called: e20_medium1 or e20_medium_tight, the specific thresholds to be used in this trigger are not yet defined, we could provide input on the prefered/disliked cut tightening. <br />
<li> 2e12_medium </li><br />
<br />
It should be kept unprescaled through whole 2011 data taking <br />
<li>....</li><br />
</ul><br />
<br />
----<br />
<br />
USEFUL LINKS<br />
<br />
https://twiki.cern.ch/twiki/bin/view/Atlas/TrigEgamma<br />
<br />
https://twiki.cern.ch/twiki/bin/viewauth/Atlas/TrigHypoCutTools</div>Lhep