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Background Subtraction from the Dilepton Spectra
Properties of the background subtraction procedure commonly used for the analysis of dilepton spectra are discussed within a simple model. It is shown that a production asymmetry between positive and negative background muons and a large multiplicity of signal pairs will lead to biased results. Ther...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
2000
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/433143 |
| _version_ | 1780895320566136832 |
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| author | Gazdzicki, Marek Gorenstein, Mark I. |
| author_facet | Gazdzicki, Marek Gorenstein, Mark I. |
| author_sort | Gazdzicki, Marek |
| collection | CERN |
| description | Properties of the background subtraction procedure commonly used for the analysis of dilepton spectra are discussed within a simple model. It is shown that a production asymmetry between positive and negative background muons and a large multiplicity of signal pairs will lead to biased results. Therefore the applicability of this procedure for the analysis of nucleus-nucleus data should be reconsidered. |
| id | cern-433143 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2000 |
| record_format | invenio |
| spelling | cern-4331432023-03-14T17:58:53Zhttp://cds.cern.ch/record/433143engGazdzicki, MarekGorenstein, Mark I.Background Subtraction from the Dilepton SpectraParticle Physics - PhenomenologyProperties of the background subtraction procedure commonly used for the analysis of dilepton spectra are discussed within a simple model. It is shown that a production asymmetry between positive and negative background muons and a large multiplicity of signal pairs will lead to biased results. Therefore the applicability of this procedure for the analysis of nucleus-nucleus data should be reconsidered.A validity of a recent estimate of an upper limit of charm production in central Pb+Pb collisions at 158 AGeV is critically discussed. Within a simple model we study properties of the background subtraction procedure used for an extraction of the charm signal from the analysis of dilepton spectra. We demonstrate that a production asymmetry between positively and negatively charged background muons and a large multiplicity of signal pairs leads to biased results. Therefore the applicability of this procedure for the analysis of nucleus-nucleus data should be reconsidered before final conclusions on the upper limit estimate of charm production could be drawn.A validity of a recent estimate of an upper limit of charm production in central Pb+Pb collisions at 158 AGeV is critically discussed. Within a simple model we study properties of the background subtraction procedure used for an extraction of the charm signal from the analysis of dilepton spectra. We demonstrate that a production asymmetry between positively and negatively charged background muons and a large multiplicity of signal pairs leads to biased results. Therefore the applicability of this procedure for the analysis of nucleus-nucleus data should be reconsidered before final conclusions on the upper limit estimate of charm production could be drawn.A validity of a recent estimate of an upper limit of charm production in central Pb+Pb collisions at 158 AGeV is critically discussed. Within a simple model we study properties of the background subtraction procedure used for an extraction of the charm signal from the analysis of dilepton spectra. We demonstrate that a production asymmetry between positively and negatively charged background muons and a large multiplicity of signal pairs leads to biased results. Therefore the applicability of this procedure for the analysis of nucleus-nucleus data should be reconsidered before final conclusions on the upper limit estimate of charm production could be drawn.hep-ph/0003319IKF-HENPG-02-00oai:cds.cern.ch:4331432000-03-31 |
| spellingShingle | Particle Physics - Phenomenology Gazdzicki, Marek Gorenstein, Mark I. Background Subtraction from the Dilepton Spectra |
| title | Background Subtraction from the Dilepton Spectra |
| title_full | Background Subtraction from the Dilepton Spectra |
| title_fullStr | Background Subtraction from the Dilepton Spectra |
| title_full_unstemmed | Background Subtraction from the Dilepton Spectra |
| title_short | Background Subtraction from the Dilepton Spectra |
| title_sort | background subtraction from the dilepton spectra |
| topic | Particle Physics - Phenomenology |
| url | http://cds.cern.ch/record/433143 |
| work_keys_str_mv | AT gazdzickimarek backgroundsubtractionfromthedileptonspectra AT gorensteinmarki backgroundsubtractionfromthedileptonspectra |