Search for resonant t(t)over-bar production in lepton plus jets events in pp collisions at root s=7 TeV

Torna indietro

Abstract

A model-independent search for the production of heavy resonances decaying into top-antitop quark pairs is presented. The search is based on events containing one lepton (muon or electron) and at least two jets selected from data samples corresponding to an integrated luminosity of 4.4-5.0 fb(-1) collected in pp collisions at root s = 7 TeV. Results are presented from the combination of two dedicated searches optimized for boosted production and production at threshold. No excess of events is observed over the expected yield from the standard model processes. Topcolor Z' bosons with narrow (wide) width are excluded at 95% confidence level for masses below 1.49 (2.04) TeV and an upper limit of 0.3 (1.3) pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV. Kaluza-Klein excitations of a gluon with masses below 1.82 TeV (at 95% confidence level) in the Randall-Sundrum model are also excluded, and an upper limit of 0.7 pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV. RI Lokhtin, Igor/D-7004-2012; Novaes, Sergio/D-3532-2012; Wulz, Claudia-Elisabeth/H-5657-2011; Fruhwirth, Rudolf/H-2529-2012; Tinoco Mendes, Andre David/D-4314-2011; Flix, Josep/G-5414-2012; Rolandi, Luigi (Gigi)/E-8563-2013; Montanari, Alessandro/J-2420-2012; Della Ricca, Giuseppe/B-6826-2013; Petrushanko, Sergey/D-6880-2012; Raidal, Martti/F-4436-2012; Tomei, Thiago/E-7091-2012; Zalewski, Piotr/H-7335-2013; Mundim, Luiz/A-1291-2012; Ivanov, Andrew/A-7982-2013 OI Novaes, Sergio/0000-0003-0471-8549; Tinoco Mendes, Andre David/0000-0001-5854-7699; Rolandi, Luigi (Gigi)/0000-0002-0635-274X; Della Ricca, Giuseppe/0000-0003-2831-6982; Mundim, Luiz/0000-0001-9964-7805; Ivanov, Andrew/0000-0002-9270-5643

Autore Pugliese

Tutti gli autori

  • POMPILI A.;MARANGELLI B.;CALABRIA C.;SELVAGGI G.;SINGH G.;LUSITO L.;BARBONE L.;ABBRESCIA M.;DE PALMA M.;PACIFICO N.;VENDITTI R.;MY S.;NUZZO S.V.;CHHIBRA S.S

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2012

ISSN

1029-8479

ISBN

Non Disponibile

Numero di citazioni Wos

3

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile