A search for narrow, high-mass resonances decaying to electron or muon pairs has been performed using pp collision data collected at s=7TeV by the CMS experiment in 2011. The data sample corresponds to an integrated luminosity of approximately 5 fb-1. The event yields observed in the signal regions are consistent with predictions of the standard model backgrounds, and upper limits on the cross section times branching fraction for a resonance decaying to dileptons are extracted from a shape analysis of the dilepton invariant mass distribution. The resulting mass limits at 95% confidence level are 2330 GeV for the Z' in the Sequential Standard Model, 2000 GeV for the superstring-inspired Zψ' resonance, 890 (540) GeV for the Stueckelberg extension ZSt' with the mass parameter ε=0.06 (0.04), and 2140 (1810) GeV for Kaluza-Klein gravitons with the coupling parameter k/M-Pl of 0.10 (0.05). These limits are the most stringent to date.

Search for narrow resonances in dilepton mass spectra in pp collisions at s=7TeV / Chatrchyan, S., Khachatryan, V., Sirunyan, A.m., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Ero, J., Fabjan, C., Friedl, M., Fruhwirth, R., Ghete, V.m., Hammer, J., Hormann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Krammer, M., Liko, D., Mikulec, I., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 714:2-5(2012), pp. 158-179. [10.1016/j.physletb.2012.06.051]

Search for narrow resonances in dilepton mass spectra in pp collisions at s=7TeV

CREANZA, Donato Maria;DE FILIPPIS, Nicola;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;MY, Salvatore;PUGLIESE, Gabriella Maria Incoronata;
2012

Abstract

A search for narrow, high-mass resonances decaying to electron or muon pairs has been performed using pp collision data collected at s=7TeV by the CMS experiment in 2011. The data sample corresponds to an integrated luminosity of approximately 5 fb-1. The event yields observed in the signal regions are consistent with predictions of the standard model backgrounds, and upper limits on the cross section times branching fraction for a resonance decaying to dileptons are extracted from a shape analysis of the dilepton invariant mass distribution. The resulting mass limits at 95% confidence level are 2330 GeV for the Z' in the Sequential Standard Model, 2000 GeV for the superstring-inspired Zψ' resonance, 890 (540) GeV for the Stueckelberg extension ZSt' with the mass parameter ε=0.06 (0.04), and 2140 (1810) GeV for Kaluza-Klein gravitons with the coupling parameter k/M-Pl of 0.10 (0.05). These limits are the most stringent to date.
2012
Search for narrow resonances in dilepton mass spectra in pp collisions at s=7TeV / Chatrchyan, S., Khachatryan, V., Sirunyan, A.m., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Ero, J., Fabjan, C., Friedl, M., Fruhwirth, R., Ghete, V.m., Hammer, J., Hormann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Krammer, M., Liko, D., Mikulec, I., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 714:2-5(2012), pp. 158-179. [10.1016/j.physletb.2012.06.051]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/1676
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