Jet trimming

Krohn, David; Thaler, Jesse; Wang, Lian-Tao

doi:10.1007/jhep02(2010)084

Cited by 580 publications

(567 citation statements)

References 29 publications

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“…through the use of a set of jet reconstruction and identi cation methods that exploit the internal structure of jets, known as jet substructure techniques [73]. The Higgs boson candidate is reconstructed as a single anti − k T R = 1.0 jet, trimmed with subjet radius parameter R sub = 0.3 and subjet transverse momentum fraction p Ti /p jet T < 0.05, where p Ti is the transverse momentum of the i-th subjet and p jet T is the p T of the untrimmed jet [74]. This R = 1.0 jet must be associated with two b-tagged anti − k T R = 0.3 jets reconstructed only from charged particle tracks (track-jets) [75].…”

Section: Eft Modelsmentioning

confidence: 99%

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS

Cheng

2017

Springer Theses

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Section: Eft Modelsmentioning

confidence: 99%

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS

Cheng

2017

Springer Theses

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“…To reduce the impact of soft radiation and pileup, the large-radius jets are groomed using reclustered jet trimming, where constituents with p T less than 5% of the ungroomed jet p T are removed [111][112][113][114]. Electrons and muons are not included in the reclustering, since it was found that including them increases the background acceptance more than the signal efficiency.…”

Section: Event Reconstruction and Selectionmentioning

confidence: 99%

Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum ins=13 TeVpp
Aaboud
¹
,
Bergeås
²
,
Brenner
³

et al. 2016
Phys. Rev. D
54
0
32
0
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The results of a search for the top squark, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, jets, and missing transverse momentum are reported. The search uses the 2015 LHC pp collision data at a center-of-mass energy of ffiffi ffi s p ¼ 13 TeV recorded by the ATLAS detector and corresponding to an integrated luminosity of 3.2 fb −1 . The analysis targets two types of signal models: gluino-mediated pair production of top squarks with a nearly mass-degenerate top squark and neutralino and direct pair production of top squarks, decaying to the top quark and the lightest neutralino. The experimental signature in both signal scenarios is similar to that of a top quark pair produced in association with large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits on gluino and top squark masses are set at 95% confidence level. The results extend the LHC run-1 exclusion limit on the gluino mass up to 1460 GeV in the gluino-mediated scenario in the high gluino and low top squark mass region and add an excluded top squark mass region from 745 to 780 GeV for the direct top squark model with a massless lightest neutralino. The results are also reinterpreted to set exclusion limits in a model of vectorlike top quarks.

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“…Large-radius jets have trimming [18] applied. Trimming allows the mitigation of pile-up in large-radius jets.…”

Section: Object Selectionmentioning

confidence: 99%

A search for $t\bar t$ resonance in the lepton plus jets channel with ATLAS using 14 fb⁻¹of proton-proton collisions at √s= 8 TeV

Benjamin

2013

EPJ Web of Conferences

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Abstract. 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 di↵ers 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 1 of proton-proton collisions data collected at center-of-mass energy p 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 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. IntroductionThis note reports on an ATLAS experiment [1] search for the production of top quark pair resonances, such as a leptophobic Z' or a Kaluza-Klein gluon, produced in protonproton collisions at a center-of-mass energy of 8 TeV using data collected in 2012 with an integrated luminosity of 14.3 fb 1 [2]. This search is carried out in the lepton plus jets decay channel, where one of the W bosons from a top quark decays leptonically (to an electron or a muon and a neutrino) and the other decays hadronically. The tt invariant mass spectrum is tested for any local excess of events that may stem from a resonance decaying into tt. The events are reconstructed using a combination of resolved and boosted reconstruction methods. In the former, the hadronically decaying top quark is identified by two or three distinct small-radius jets. In the latter, the hadronically decaying top quark is identified by reconstructing one large-radius jet with a substructure consistent with the decay products of a W boson and a b quark. High momentum top quark decays are indeed reconstructed more e ciently using boosted reconstruction techniques. For both reconstruction methods, the semileptonically decaying top quark is identified by a lepton, one small-radius jet and missing transverse momentum.Both ATLAS [2] and CMS [3] have used two specific theoretical models as benchmarks to test the production of narrow and broad resonances as compared to the detector resolution, which is of the order of 7%. The narrow resonance benchmark is a topcolor, leptophobic Z' given by model IV of Harris et al. [4] with a width of a e-mail: dechenaux@lpsc.in2p3.fr Z 0 /m Z 0 = 1.2%. The broad resonance benchmark is related to Kaluza-Klein (KK) excitation states of the gluon as predicted in Randall-Sundrum models with a warped extra-dimension and where all the standard model fields can propagate in the five dimensions. A resonance width of g KK /m g KK = 15.3% is used. Details on the tested models can be found in previous ATLAS studies [5]. Data and Monte Carlo samplesOnly data recorded under stable beam conditions and operationnal ATLAS subdetect...

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Jet trimming

Cited by 580 publications

References 29 publications

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS

Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum ins=13 TeVpp
Aaboud
¹
,
Bergeås
²
,
Brenner
³

et al. 2016
Phys. Rev. D
54
0
32
0
View full text Add to dashboard Cite

A search for $t\bar t$ resonance in the lepton plus jets channel with ATLAS using 14 fb⁻¹of proton-proton collisions at √s= 8 TeV

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Jet trimming

Cited by 580 publications

References 29 publications

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS

Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum ins=13 TeVppAaboud1, Bergeås2, Brenner3 et al. 2016Phys. Rev. D540320View full textAdd to dashboardCite

A search for $t\bar t$ resonance in the lepton plus jets channel with ATLAS using 14 fb−1of proton-proton collisions at √s= 8 TeV

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Product

Resources

About

Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum ins=13 TeVpp
Aaboud
¹
,
Bergeås
²
,
Brenner
³

et al. 2016
Phys. Rev. D
54
0
32
0
View full text Add to dashboard Cite

A search for $t\bar t$ resonance in the lepton plus jets channel with ATLAS using 14 fb⁻¹of proton-proton collisions at √s= 8 TeV