Search for t(t)over-bar resonances in the lepton plus jets final state with ATLAS using 4.7 fb(-1) of pp collisions at root s=7 TeV
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Search for t(t)over-bar resonances in the lepton plus jets final state with ATLAS using 4.7 fb(-1) of pp collisions at root s=7 TeV

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Search for t(t)over-bar resonances in the lepton plus jets final state with ATLAS using 4.7 fb(-1) of pp collisions at root s=7 TeV

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dc.contributor.author ATLAS Collaboration
dc.contributor.author Cabrera Urbán, Susana
dc.contributor.author Castillo Giménez, María Victoria
dc.contributor.author Costa Mezquita, María José
dc.contributor.author Fassi, Farida
dc.contributor.author Ferrer Soria, Antonio
dc.contributor.author Fiorini, Luca
dc.contributor.author Fuster Verdú, Juan A.
dc.contributor.author García García, Carmen
dc.contributor.author García Navarro, José Enrique
dc.contributor.author González de la Hoz, Santiago
dc.contributor.author Hernández Jiménez, Yesenia
dc.contributor.author Higón Rodríguez, Emilio
dc.contributor.author Irles Quiles, Adrián
dc.contributor.author Kaci, Mohammed
dc.contributor.author Lacasta Llácer, Carlos
dc.contributor.author Lacuesta Miquel, Vicente
dc.contributor.author March Ruiz, Luis
dc.contributor.author Martí García, Salvador
dc.contributor.author Miñano Moya, Mercedes
dc.contributor.author Mitsou, Vasiliki
dc.contributor.author Moles Valls, Regina
dc.contributor.author Moreno Llácer, María
dc.contributor.author Oliver García, Elena
dc.contributor.author Pedraza López, Sebastián
dc.contributor.author Pérez García-Estañ, María Teresa
dc.contributor.author Romero Adam, E.
dc.contributor.author Ros Martínez, Eduardo
dc.contributor.author Salt Cairols, José
dc.contributor.author Sánchez Martínez, Victoria
dc.contributor.author Soldevila, U.
dc.contributor.author Sánchez Martínez, Javier
dc.contributor.author Torró Pastor, Emma
dc.contributor.author Valero Biot, Alberto
dc.contributor.author Valladolid Gallego, E.
dc.contributor.author Valls Ferrer, Juan Antonio
dc.contributor.author Villaplana Pérez, Miguel
dc.contributor.author Vos, Marcel
dc.date.accessioned 2014-09-18T08:26:45Z
dc.date.available 2014-09-18T08:26:45Z
dc.date.issued 2013
dc.identifier.uri http://hdl.handle.net/10550/37985
dc.description.abstract A search for new particles that decay into top quark pairs (t (t) over bar) 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 root s = 7 TeV. In the t (t) over bar) -> WbWb decay, the lepton plus jets final state is used, where one W boson decays leptonically and the other hadronically. The t (t) over bar) 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 t (t) over bar) invariant mass spectrum is performed. No evidence for a t (t) over bar) 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 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.iso eng
dc.relation.ispartof Physical Review D, 2013, vol. 88, num. 1, p. 012004-1-012004-28
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source ATLAS Collaboration Cabrera Urbán, Susana Castillo Giménez, María Victoria Costa Mezquita, María José Fassi, Farida Ferrer Soria, Antonio Fiorini, Luca Fuster Verdú, Juan A. García García, Carmen García Navarro, José Enrique González de la Hoz, Santiago Hernández Jiménez, Yesenia Higón Rodríguez, Emilio Irles Quiles, Adrián Kaci, Mohammed Lacasta Llácer, Carlos Lacuesta Miquel, Vicente March, L. Martí García, Salvador Miñano Moya, Mercedes Mitsou, Vasiliki Moles Valls, Regina Moreno Llácer, María Oliver García, Elena Pedraza López, Sebastián Pérez García-Estañ, María Teresa Romero Adam, E. Ros Martínez, Eduardo Salt Cairols, José Sánchez Martínez, V. Soldevila, U. Sánchez, J. Torró Pastor, Emma Valero, A. Valladolid Gallego, E. Valls Ferrer, Juan Antonio Villaplana Pérez, Miguel Vos, Marcel 2013 Search for t(t)over-bar resonances in the lepton plus jets final state with ATLAS using 4.7 fb(-1) of pp collisions at root s=7 TeV Physical Review D 88 1 012004-1 012004-28
dc.subject Física nuclear
dc.title Search for t(t)over-bar resonances in the lepton plus jets final state with ATLAS using 4.7 fb(-1) of pp collisions at root s=7 TeV
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-09-18T08:26:45Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.88.012004
dc.identifier.idgrec 091419

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