The results of a search for an excited bottom-quark b* in pp collisions at root s = 7 TeV, using 4.7 fb(-1) of data collected by the ATLAS detector at the LHC are presented. In the model studied, a single b*-quark is produced through a chromomagnetic interaction and subsequently decays to a W boson and a top quark. The search is performed in the dilepton and lepton + jets final states, which are combined to set limits on b*-quark couplings for a range of b*-quark masses. For a benchmark with unit size chromomagnetic and Standard Model-like electroweak b* couplings, b* quarks with masses less than 870 GeV are excluded at the 95% credibility level. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.

Search for single b*-quark production with the ATLAS detector at root s=7 TeV / G., A., T., A., B., A., J., A., S. A., K., A. A., A., O., A., R., A., B., A., M., A., O. S., A., H., A., H., A., M. I., O., B. S., A., L., A., D. L., A., T. N., A., J., A., S., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 721:(2013), pp. 171-189. [10.1016/j.physletb.2013.03.016]

Search for single b*-quark production with the ATLAS detector at root s=7 TeV

BAGNAIA, Paolo;BINI, Cesare;DIONISI, Carlo;GAUZZI, Paolo;GENTILE, Simonetta;GIAGU, Stefano;LACAVA, Francesco;LUCI, Claudio;MESSINA, Andrea;MONZANI, SIMONE;SOLFAROLI CAMILLOCCI, ELENA;VERDUCCI, MONICA;
2013

Abstract

The results of a search for an excited bottom-quark b* in pp collisions at root s = 7 TeV, using 4.7 fb(-1) of data collected by the ATLAS detector at the LHC are presented. In the model studied, a single b*-quark is produced through a chromomagnetic interaction and subsequently decays to a W boson and a top quark. The search is performed in the dilepton and lepton + jets final states, which are combined to set limits on b*-quark couplings for a range of b*-quark masses. For a benchmark with unit size chromomagnetic and Standard Model-like electroweak b* couplings, b* quarks with masses less than 870 GeV are excluded at the 95% credibility level. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.
2013
b*; excited quark; single top-quark; atlas
01 Pubblicazione su rivista::01a Articolo in rivista
Search for single b*-quark production with the ATLAS detector at root s=7 TeV / G., A., T., A., B., A., J., A., S. A., K., A. A., A., O., A., R., A., B., A., M., A., O. S., A., H., A., H., A., M. I., O., B. S., A., L., A., D. L., A., T. N., A., J., A., S., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 721:(2013), pp. 171-189. [10.1016/j.physletb.2013.03.016]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/555852
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