A search for tt resonance in the lepton plus jets channel with ATLAS using 14 fb super(-1) of proton-proton collisions at [radical]s = 8 TeV

The search for tt resonances allows the Investigation of a wide range of physics beyond the Standard Model. For a high mass resonance, the top quark is produced with a transverse momentum that is large, compared to its mass, and the decay of such a highly boosted top often leads to a topology that d...

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Bibliographic Details
Published inEPJ Web of conferences Vol. 60; p. np
Main Author Benjamin, Dechenaux
Format Journal Article
LanguageEnglish
Published 01.01.2013
Subjects
Benchmarking
Bosons
Channels
Collisions
Decay
Jets
Quarks
Searching
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Summary:The search for tt resonances allows the Investigation of a wide range of physics beyond the Standard Model. For a high mass resonance, the top quark is produced with a transverse momentum that is large, compared to its mass, and the decay of such a highly boosted top often leads to a topology that differs in several respects from that encountered when the top quarks are produced approximately at rest. The search is performed with the ATLAS experiment at the LHC using an integrated luminosity of 14 fb super(-1) of proton-proton collisions data collected at center-of-mass energy [radical]s = 8 TeV. No evidence for a tt resonance is found and 95% CL limits on the production rate are determined for massive states in two benchmark models. A narrow leptophobic topcolor lor Z' boson with a mass below 1.8 TeV is excluded and a Kaluza-Klein excitation of the gluon in a Randall-Sundrum model is excluded for masses below 2.0 TeV.
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ISSN:2100-014X
DOI:10.1051/epjconf/20136020044