Search for anomalous production of events with a high energy lepton and photon at the Tevatron

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We present results of a search for the anomalous production of events containing a high-transverse momentum charged lepton ({ell}, either e or {mu}) and photon ({gamma}), accompanied by missing transverse energy (E{sub T}), and/or additional leptons and photons, and jets (X). We use the same kinematic selection criteria as in a previous CDF search, but with a substantially larger data set, 305 pb{sup -1}, a p{bar p} collision energy of 1.96 TeV, and the upgraded CDF II detector. We find 42 {ell}{gamma}E{sub T} events versus a standard model expectation of 37.3 {+-} 5.4 events. The level of excess observed in ... continued below

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157 pages

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Loginov, Andrey Borisovich & /Moscow, ITEP January 1, 2006.

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Description

We present results of a search for the anomalous production of events containing a high-transverse momentum charged lepton ({ell}, either e or {mu}) and photon ({gamma}), accompanied by missing transverse energy (E{sub T}), and/or additional leptons and photons, and jets (X). We use the same kinematic selection criteria as in a previous CDF search, but with a substantially larger data set, 305 pb{sup -1}, a p{bar p} collision energy of 1.96 TeV, and the upgraded CDF II detector. We find 42 {ell}{gamma}E{sub T} events versus a standard model expectation of 37.3 {+-} 5.4 events. The level of excess observed in Run I, 16 events with an expectation of 7.6 {+-} 0.7 events (corresponding to a 2.7 {sigma} effect), is not supported by the new data. In the signature of {ell}{ell}{gamma} + X we observe 31 events versus an expectation of 23.0 {+-} 2.7 events. In this sample we find no events with an extra photon or E{sub T} and so find no events like the one ee{gamma}{gamma} E{sub T} event observed in Run I.

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157 pages

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  • Report No.: FERMILAB-THESIS-2006-48
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/900361 | External Link
  • Office of Scientific & Technical Information Report Number: 900361
  • Archival Resource Key: ark:/67531/metadc889776

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 7, 2016, 9 p.m.

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Loginov, Andrey Borisovich & /Moscow, ITEP. Search for anomalous production of events with a high energy lepton and photon at the Tevatron, thesis or dissertation, January 1, 2006; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc889776/: accessed December 10, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.