W-Jet Tagging: Optimizing the Identification of Boosted Hadronically-Decaying W Bosons

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W-Jet Tagging: Optimizing the Identification of Boosted Hadronically-Decaying W Bosons

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dc.contributor.author Cui, Yanou
dc.contributor.author Han, Zhenyu
dc.contributor.author Schwartz, Matthew D
dc.date.accessioned 2012-01-30T19:19:25Z
dc.date.issued 2011
dc.identifier.citation Cui, Yanou, Zhenyu Han, and Matthew D. Schwartz. 2011. W-jet tagging: optimizing the identification of boosted hadronically-decaying W bosons. Physical Review D 83(7): 074023. en_US
dc.identifier.issn 1550-7998 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:8063806
dc.description.abstract A method is proposed for distinguishing highly boosted hadronically-decaying \(W's\) \((W jets)\) from QCD-jets using jet substructure. Previous methods, such as the filtering/mass-drop method, can give a factor of \(\sim 2\) improvement in \(S/\sqrt{B}\) for jet \(p_T \ge 200  GeV\). In contrast, a multivariate approach including new discriminants such as \(R\) cores, which characterize the shape of the \(W\) jet, subjet planar flow, and grooming-sensitivities is shown to provide a much larger factor of \(\sim 5\) improvement in \(S/\sqrt{B}\). For longitudinally polarized \(W's\), such as those coming from many new physics models, the discrimination is even better. Comparing different Monte Carlo simulations, we observe a sensitivity of some variables to the underlying event; however, even with a conservative estimates, the multivariate approach is very powerful. Applications to semileptonic \(WW\) resonance searches and all-hadronic \(W+jet\) searches at the LHC are also discussed. Code implementing our \(W-je\)t tagging algorithm is publicly available at http://jets.physics.harvard.edu/wtag. en_US
dc.description.sponsorship Physics en_US
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.relation.isversionof 10.1103/PhysRevD.83.074023 en_US
dc.relation.hasversion http://arxiv.org/abs/1012.2077 en_US
dash.license OAP
dc.subject high energy physics en_US
dc.subject phenomenology en_US
dc.title W-Jet Tagging: Optimizing the Identification of Boosted Hadronically-Decaying W Bosons en_US
dc.type Journal Article en_US
dc.description.version Accepted Manuscript en_US
dc.relation.journal Physical Review D en_US
dash.depositing.author Schwartz, Matthew D
dc.date.available 2012-01-30T19:19:25Z

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  • FAS Scholarly Articles [7078]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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