dc.creator | Aad, G. | |
dc.creator | Abajyan, T. | |
dc.creator | Abbott, B. | |
dc.creator | Abdallah, J. | |
dc.creator | Abdel Khalek, S. | |
dc.creator | Alonso, Francisco | |
dc.creator | Anduaga, Xabier Sebastian | |
dc.creator | Dova, Maria Teresa | |
dc.creator | González Silva, María Laura | |
dc.creator | Monticelli, Fernando Gabriel | |
dc.creator | Otero y Garzon, Gustavo Javier | |
dc.creator | Piegaia, Ricardo Nestor | |
dc.creator | Romeo, Gaston Leonardo | |
dc.creator | Tripiana, Martin Fernando | |
dc.creator | Zhuang, X. | |
dc.creator | Zhuravlov, V. | |
dc.creator | Zieminska, D. | |
dc.creator | Zimin, N. I. | |
dc.creator | Zimmermann, R. | |
dc.creator | Zimmermann, S. | |
dc.creator | Zimmermann, S. | |
dc.creator | Ziolkowski, M. | |
dc.creator | Zitoun, R. | |
dc.creator | Živković, L. | |
dc.creator | Zmouchko, V. V. | |
dc.creator | Zobernig, G. | |
dc.creator | Zoccoli, A. | |
dc.creator | zur Nedden, M. | |
dc.creator | Zutshi, V. | |
dc.creator | Zwalinski, L. | |
dc.date.accessioned | 2017-11-30T18:22:18Z | |
dc.date.accessioned | 2018-11-06T14:13:23Z | |
dc.date.available | 2017-11-30T18:22:18Z | |
dc.date.available | 2018-11-06T14:13:23Z | |
dc.date.created | 2017-11-30T18:22:18Z | |
dc.date.issued | 2013-07 | |
dc.identifier | Aad, G.; Abajyan, T.; Abbott, B.; Abdallah, J.; Abdel Khalek, S.; et al.; A search for ttbar resonances in the lepton plus jets final state with ATLAS using 4.7 fb-1 of pp collisions at √s = 7 TeV; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 88; 1; 7-2013; 12004-12024 | |
dc.identifier | 1550-7998 | |
dc.identifier | http://hdl.handle.net/11336/29361 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1884065 | |
dc.description.abstract | A search for new particles that decay into top quark pairs (ttbar) is performed with the ATLAS experiment at the LHC using an integrated luminosity of 4.7 fb^-1 of proton-proton (pp) collision data collected at a center-of-mass energy sqrt(s)=7 TeV. In the ttbar --> WbWb decay, the lepton plus jets final state is used, where one W boson decays leptonically and the other hadronically. The ttbar system is reconstructed using both small-radius and large-radius jets, the latter being supplemented by a jet substructure analysis. A search for local excesses in the number of data events compared to the Standard Model expectation in the ttbar invariant mass spectrum is performed. No evidence for a ttbar resonance is found and 95% credibility-level limits on the production rate are determined for massive states predicted in two benchmark models. The upper limits on the cross section times branching ratio of a narrow Z' resonance range from 5.1 pb for a boson mass of 0.5 TeV to 0.03 pb for a mass of 3 TeV. A narrow leptophobic topcolor Z' resonance with a mass below 1.74 TeV is excluded. Limits are also derived for a broad color-octet resonance with Gamma/m = 15.3%. A Kaluza-Klein excitation of the gluon in a Randall-Sundrum model is excluded for masses below 2.07 TeV. | |
dc.language | eng | |
dc.publisher | American Physical Society | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prd/abstract/10.1103/PhysRevD.88.012004 | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevD.88.012004 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1305.2756 | |
dc.rights | https://creativecommons.org/licenses/by/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | ATLAS | |
dc.subject | LHC | |
dc.title | A search for ttbar resonances in the lepton plus jets final state with ATLAS using 4.7 fb-1 of pp collisions at √s = 7 TeV | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |