Hollow cone sieve for top

A method of top tagging is introduced. Using the anti-kt algorithm to define jets, events with nj=2 fat jets of cone size R=1.5 are decomposed into R=0.6 subjets and retained if nj(R=0.6) ⩾4. One pair of subjets reconstructs the W mass and another two subjets are tagged as a b-jet, as necessary for...

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Bibliographic Details
Published inPhysics letters. B Vol. 708; no. 3-5; pp. 296 - 299
Main Authors Barger, Vernon, Huang, Peisi
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier B.V 28.02.2012
Elsevier
Subjects
Algorithms
Computer simulation
Decomposition
Elementary particles
Exact sciences and technology
Jets
Marking
Nuclear physics
Origins
Physics
Sieves
The physics of elementary particles and fields
LHC collider
Jets
Algorithms
Partons
Quantum chromodynamics
Online AccessGet full text
ISSN0370-2693
1873-2445
DOI10.1016/j.physletb.2012.01.056

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Summary:A method of top tagging is introduced. Using the anti-kt algorithm to define jets, events with nj=2 fat jets of cone size R=1.5 are decomposed into R=0.6 subjets and retained if nj(R=0.6) ⩾4. One pair of subjets reconstructs the W mass and another two subjets are tagged as a b-jet, as necessary for hadronic or semileptonic events of tt¯ origin. This “hollow cone” method distinguishes the tt¯ events from the light parton QCD dijet events. Our simulations are made for the LHC at 7 TeV. The sieve allows for top identification at lower pT than other proposed methods and thus allows a higher signal retention.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2012.01.056