Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2008.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2009
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| Online Access: | http://hdl.handle.net/1721.1/44759 |
| _version_ | 1811071304493694976 |
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| author | Mooney, Michael Ryan |
| author2 | Christoph M. E. Paus. |
| author_facet | Christoph M. E. Paus. Mooney, Michael Ryan |
| author_sort | Mooney, Michael Ryan |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2008. |
| first_indexed | 2024-09-23T08:49:04Z |
| format | Thesis |
| id | mit-1721.1/44759 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T08:49:04Z |
| publishDate | 2009 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/447592019-04-10T19:12:37Z Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector Mooney, Michael Ryan Christoph M. E. Paus. Massachusetts Institute of Technology. Dept. of Physics. Massachusetts Institute of Technology. Dept. of Physics. Physics. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2008. In title on title page, "[mu]" appears as lower case Greek letter; and, double underscored "l" and "e" appear as script. Includes bibliographical references (p. 61-64). We perform multiple analyses using generator-level information in the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). In particular, we carry out three central investigations: the determination of electron efficiencies, electron fake rates, and ZZ -->4l(e, [mu]) cross sections. Reconstructed Z boson decays are used as a benchmark in association with our cut-based analysis. In the Z-->2e channel we find an overall electron efficiency of 77.0%± 1.3%, and electron fake rates are calculated to be (1.7 ± 0.5) . 10-3 and (0.6 ± 0.2) 10-3 for the photon jet and QCD channels, respectively. We calculate an expected total of 17 counts/fb-1 for ZZ-->4l, which we find to have a cross section of [sigma]zz-->4l = 180 ± 45 ± 6 fb (with statistical uncertainty listed before systematic uncertainty). From our analysis using generatorlevel information, we obtain a set of reconstruction-level techniques that will be useful once the LHC starts delivering pp collisions sometime in 2008. by Michael Ryan Mooney. S.B. 2009-03-16T19:39:34Z 2009-03-16T19:39:34Z 2008 2008 Thesis http://hdl.handle.net/1721.1/44759 299063878 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 64 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Physics. Mooney, Michael Ryan Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector |
| title | Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector |
| title_full | Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector |
| title_fullStr | Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector |
| title_full_unstemmed | Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector |
| title_short | Electron identification and ZZ -->4l̳ (e̳, [mu]) cross section measurement with the CMS detector |
| title_sort | electron identification and zz 4l e mu cross section measurement with the cms detector |
| topic | Physics. |
| url | http://hdl.handle.net/1721.1/44759 |
| work_keys_str_mv | AT mooneymichaelryan electronidentificationandzz4lemucrosssectionmeasurementwiththecmsdetector |