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| Título: | Search for new heavy particles decaying to ZZ→llll, lljj in pp̅ collisions at √s=1.96 TeV |
Autor: | Aaltonen, T.; Álvarez González, B.; Casal, Bruno CSIC; Cuevas, Javier CSIC ORCID; Gómez, Gervasio CSIC ORCID ; Palencia, Enrique CSIC ORCID; Rodrigo, Teresa CSIC ORCID ; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Vila, Iván CSIC ORCID; Vilar Cortabitarte, R. CSIC ORCID; Vizán, J. CSIC ORCID | Fecha de publicación: | jun-2011 | Editor: | American Physical Society | Citación: | Physical Review D 83(11): 112008 (2011) | Resumen: | We report on a search for anomalous production of Z boson pairs through a massive resonance decay in data corresponding to 2.5–2.9 fb-1 of integrated luminosity in pp̅ collisions at √s=1.96 TeV using the CDF II detector at the Fermilab Tevatron. This analysis, with more data and channels where the Z bosons decay to muons or jets, supersedes the 1.1 fb-1 four-electron channel result previously published by CDF. In order to maintain high efficiency for muons, we use a new forward tracking algorithm and muon identification requirements optimized for these high signal-to-background channels. Predicting the dominant backgrounds in each channel entirely from sideband data samples, we observe four-body invariant mass spectra above 300 GeV/c2 that are consistent with background. We set limits using the acceptance for a massive graviton resonance that are 7–20 times stronger than the previously published direct limits on resonant ZZ diboson production. | Descripción: | 18 páginas, 22 figuras, 17 tablas.-- PACS numbers: 12.60.Cn, 13.85.Rm, 14.70.Hp.-- CDF Collaboration: et al. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevD.83.112008 | URI: | http://hdl.handle.net/10261/46592 | DOI: | 10.1103/PhysRevD.83.112008 | ISSN: | 1550-7998 | E-ISSN: | 1550-2368 |
| Aparece en las colecciones: | (IFCA) Artículos |
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| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| e112008.pdf | 1,76 MB | Adobe PDF |  Visualizar/Abrir |
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