Neutral Pion Rejection at L2 using the CMS Endcap Preshower

Applying a general Artificial Neural Network approach, we have examined the possibility of neutral pion rejection at the Level 2 Trigger stage ( L2) principally using information from the CMS Endcap Preshower. We have studied both pion/photon and pion/electron discrimination. For L2 the hope was to...

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Detalles Bibliográficos
Autores principales: Kyriakis, Aristotelis, Barney, David, Loukas, Demetrios, Mousa, Jehad, Seez, Christopher
Lenguaje:eng
Publicado: 1999
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/687193
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author Kyriakis, Aristotelis
Barney, David
Loukas, Demetrios
Mousa, Jehad
Seez, Christopher
author_facet Kyriakis, Aristotelis
Barney, David
Loukas, Demetrios
Mousa, Jehad
Seez, Christopher
author_sort Kyriakis, Aristotelis
collection CERN
description Applying a general Artificial Neural Network approach, we have examined the possibility of neutral pion rejection at the Level 2 Trigger stage ( L2) principally using information from the CMS Endcap Preshower. We have studied both pion/photon and pion/electron discrimination. For L2 the hope was to achieve some useful pion/electron discrimination for a high electron efficiency. For a single electron/photon efficiency of 95% the results show that no useful rejection of neutral pions against electrons/photons can be obtained using this algorithm alone, due to the presence of tracker material. If the efficiency is lowered or information from the tracker is available, the rejection can increase dramatically. This will be the case for off-line analyses.
id cern-687193
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
record_format invenio
spelling cern-6871932019-09-30T06:29:59Zhttp://cds.cern.ch/record/687193engKyriakis, AristotelisBarney, DavidLoukas, DemetriosMousa, JehadSeez, ChristopherNeutral Pion Rejection at L2 using the CMS Endcap PreshowerDetectors and Experimental TechniquesApplying a general Artificial Neural Network approach, we have examined the possibility of neutral pion rejection at the Level 2 Trigger stage ( L2) principally using information from the CMS Endcap Preshower. We have studied both pion/photon and pion/electron discrimination. For L2 the hope was to achieve some useful pion/electron discrimination for a high electron efficiency. For a single electron/photon efficiency of 95% the results show that no useful rejection of neutral pions against electrons/photons can be obtained using this algorithm alone, due to the presence of tracker material. If the efficiency is lowered or information from the tracker is available, the rejection can increase dramatically. This will be the case for off-line analyses.CMS-NOTE-1999-076oai:cds.cern.ch:6871931999-12-16
spellingShingle Detectors and Experimental Techniques
Kyriakis, Aristotelis
Barney, David
Loukas, Demetrios
Mousa, Jehad
Seez, Christopher
Neutral Pion Rejection at L2 using the CMS Endcap Preshower
title Neutral Pion Rejection at L2 using the CMS Endcap Preshower
title_full Neutral Pion Rejection at L2 using the CMS Endcap Preshower
title_fullStr Neutral Pion Rejection at L2 using the CMS Endcap Preshower
title_full_unstemmed Neutral Pion Rejection at L2 using the CMS Endcap Preshower
title_short Neutral Pion Rejection at L2 using the CMS Endcap Preshower
title_sort neutral pion rejection at l2 using the cms endcap preshower
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/687193
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AT barneydavid neutralpionrejectionatl2usingthecmsendcappreshower
AT loukasdemetrios neutralpionrejectionatl2usingthecmsendcappreshower
AT mousajehad neutralpionrejectionatl2usingthecmsendcappreshower
AT seezchristopher neutralpionrejectionatl2usingthecmsendcappreshower

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