Benvenuti nell'Anagrafe della Ricerca d'Ateneo
La valutazione delle attività di ricerca che si svolgono nelle università ha assunto un'importanza rilevante sia per l'intero sistema universitario sia all'interno di ogni singolo ateneo. Roma Tre si è quindi dotata di idonei strumenti informativi in grado di supportare al meglio le azioni di monitoraggio e di valutazione delle attività di ricerca svolte nei propri dipartimentied ha realizzato una Anagrafe della Ricerca di Ateneo.
English"This Letter presents a search for tb resonances in 1.04 fb(-1) of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the invariant mass of the corresponding final state is reconstructed. The search exploits the shape of the tb invariant mass distribution compared to the expected standard model backgrounds. The model of a right-handed W'(R) with standard model-like couplings is chosen as the benchmark model for this search. No statistically significant excess of events is observed in the data, and upper limits on the cross section times the branching ratio of W'(R) resonances at 95% C.L. lie in the range of 6.1-1.0 pb for W'(R) masses ranging from 0.5 to 2.0 TeV. These limits are translated into a lower bound on the allowed right-handed W'(R) mass, giving mW'(R) > 1.13 TeV at 95% C.L. RI Wemans, Andre\/A-6738-2012; Fazio, Salvatore \/G-5156-2010; Fabbri, Laura\/H-3442-2012; Villa, Mauro\/C-9883-2009; Jones, Roger\/H-5578-2011; de Groot, Nicolo\/A-2675-2009; valente, paolo\/A-6640-2010; Takai, Helio\/C-3301-2012; Delmastro, Marco\/I-5599-2012; Livan, Michele\/D-7531-2012"
| Titolo: | Search for tb Resonances in Proton-Proton Collisions at root s=7 TeV with the ATLAS Detector |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Rivista: | |
| Abstract: | "This Letter presents a search for tb resonances in 1.04 fb(-1) of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the invariant mass of the corresponding final state is reconstructed. The search exploits the shape of the tb invariant mass distribution compared to the expected standard model backgrounds. The model of a right-handed W'(R) with standard model-like couplings is chosen as the benchmark model for this search. No statistically significant excess of events is observed in the data, and upper limits on the cross section times the branching ratio of W'(R) resonances at 95% C.L. lie in the range of 6.1-1.0 pb for W'(R) masses ranging from 0.5 to 2.0 TeV. These limits are translated into a lower bound on the allowed right-handed W'(R) mass, giving mW'(R) > 1.13 TeV at 95% C.L. RI Wemans, Andre\/A-6738-2012; Fazio, Salvatore \/G-5156-2010; Fabbri, Laura\/H-3442-2012; Villa, Mauro\/C-9883-2009; Jones, Roger\/H-5578-2011; de Groot, Nicolo\/A-2675-2009; valente, paolo\/A-6640-2010; Takai, Helio\/C-3301-2012; Delmastro, Marco\/I-5599-2012; Livan, Michele\/D-7531-2012" |
| Handle: | http://hdl.handle.net/11590/131947 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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